QBY4-15 - Air pump Vevor - Free user manual and instructions

Product Type	Double diaphragm pneumatic pump
Brand	Vevor
Model	QBY4-15
Pump Type	Air-operated diaphragm pump
Operating Principle	Compressed air actuates the diaphragms via an air distributor, creating reciprocating motion to suck and discharge fluid
Main Applications	Transfer of corrosive, viscous, flammable, explosive, toxic liquids, sludges, slurries, etc.
Compatible Fluids	Acids, bases, solvents, paints, glues, ceramic slurries, bilge water, etc.
Construction Materials (wetted parts)	Stainless steel, aluminum alloy, cast iron, engineering plastic
Diaphragm Material	NBR, Viton, Neoprene, PTFE
Maximum Suction Lift	7 m
Maximum Discharge Head	50 m
Discharge Pressure	Greater than 6 kgf/cm²
Maximum Particle Diameter	10 mm
Power Supply	Compressed air (2 to 8 kgf/cm²)
Self-priming	Yes, no need for priming water
Safety	No electricity, can be submerged, self-protection against sudden stops, suitable for explosive areas
Maintenance	Clean the connecting rod and copper bushing when replacing the diaphragm, avoid damaging the PTFE seal
Wear Parts	Diaphragm, ball valves, seals
Repairability	Simple structure, parts can be replaced without special tools
Technical Support	www.vevor.com/support

Frequently Asked Questions - QBY4-15 Vevor

What is the required compressed air pressure to operate the QBY4-15 pump?

The recommended air pressure is between 2 and 8 kgf/cm². Continuous adjustment of flow rate and discharge head is possible via the pneumatic valve.

Can this pump handle viscous liquids like paints or glues?

Yes, the pump can transfer fluids with viscosity below 10,000 centipoises, such as paints, pigments, glues, and adhesives.

How to install the QBY4-15 pump?

Installation is simple: connect the compressed air inlet, suction and discharge hoses. If the compressed air is dirty, install a pneumatic triplet (filter, regulator, lubricator). Since vibration is low, foundation bolts are generally not required.

Is the pump suitable for flammable or explosive liquids?

Yes, because it operates on compressed air without electricity, making it safe in explosive atmospheres. Moreover, the diaphragms completely isolate the fluid from mechanical parts, preventing leaks.

How to replace the pump diaphragm?

Disassemble the pump body, remove the old diaphragm, clean the connecting rod and copper bushing, then install the new diaphragm. Be careful not to damage the white PTFE seal. Reassemble in reverse order.

What is the maximum suction lift of the pump?

The suction lift can reach 7 meters dry (self-priming), and the discharge head can reach up to 50 meters.

What to do if the pump does not start or malfunctions?

First check the pressure and cleanliness of the compressed air. If the air is dirty, install a pneumatic triplet. Ensure the inlet and outlet valves are not blocked. If the problem persists, clean or replace the diaphragm and check valves.

Can the pump be used for liquids containing solids?

Yes, the pump can handle particles up to 10 mm in diameter without damage, making it suitable for sludges, slurries, and other laden media.

Does the pump require lubrication?

No, the pump operates without lubricating oil. It can even run dry without damage, which is an advantage for applications where fluid supply is irregular.

Where can I find spare parts and technical support?

Support and warranty are available at www.vevor.com/support. Wear parts (diaphragms, check valves, seals) are generally available from the manufacturer or authorized dealers.

USER MANUAL QBY4-15 Vevor

Technical Support and E-Warranty Certificate www.vevor.com/support

Air Operated Double Diaphragm Pump Instructions

MODEL: QBK-40L / QBY4-50L / QBY4-25L / QBY4-25LF46 / QBY-15PP / QBK-15P / QBK-15

We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only represent of savings you might benefit from buying certain tools with us compared to top brands and does not necessarily mean to cover all categories of tools offered are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.

VEVOR®

TOUGH TOOLS, HALF PRICE

Air Operated Double Diaphragm Pump

MODEL: QBK-40L/QBY4-50L/QBY4-25L/QBY4-25LF46/QBY-15PP/QBK-15P/QBK-15

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

Technical Support and E-Warranty Certificate www.vevor.com/support

This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.

PRODUCT PRESENTATION

This series of diaphragm pumps are the latest model at home. They are functioned to take out and suck in various corrosive liquid containing granules, viscous, volatile, inflammable, explosive or poisonous liquid, porcelain slurry, mashed fruit, flue. The reclamation of residual oil in tanker. temporary reversion of tanker, etc, The performance parameters of this series are close to that of German WLLDENPUMPS and American MARI0-WPUMPS. The components in contact with flow are made of stainless steel. aluminium alloy, cast iron and nineerina plastics. While diaphragm may be NBR. viton. neoprene or PTFE.

MAIN APPLICATION

1. The pump can handle peanuts, pickles, tomatoes, slurry, red sausages, chocolate, hops, and syrup, etc.
2. The pump can handle paint, pigment, glue, and adhesive, etc.
3. The pump can handle various glazed slurries of tile, porcelain, brick, and chinaware, etc.
4. The pump can handle various grinding materials, corrosive agents, and oil dirt, etc.
5. The pump can handle various toxic, flammable, or volatile liquids.
6. The pump can handle various brackish water, cement slurry, and mortar.
7. The pump can handle various strong acids, alkalis, and corrosive liquids, etc.
8. It can be used as a front-end transmission device for solid-liquid separation equipment.

INSTALLATION METHOD

PERFORMANCE CHARACTERISTICS

Air-operated double diaphragm pumps can not only discharge flowing liquids but also convey some difficult-to-flow media, with the advantages of self-priming pumps, submersible pumps, shield pumps, slurry pumps, and impurity pumps, etc.

1. No need to prime with water; the suction lift reaches 7 meters, the delivery lift reaches 50 meters, and the outlet pressure is >6 kgf/cm².
2. Wide flow path and good performance. The maximum particle size allowed to pass is 10 mm. The pump suffers very little damage when handling slurry and impurities.
3. The delivery rate and flow can be infinitely adjusted via the pneumatic valve (the pneumatic pressure adjustment range is 2-8 kgf/cm²).
4. This pump has no rotating parts and no bearing seals. The diaphragm completely separates the pumped medium from the pump's operating parts and working medium. The conveyed medium cannot leak out, thus preventing environmental pollution and safety hazards to personnel when handling toxic, flammable, or corrosive media.
5. No electricity: It is safe and reliable to use in flammable and explosive places.
6. It can be soaked in the medium.
7. It is convenient to use and reliable to work. Only open or close the valve body when starting or stopping. Even if it operates without medium or pauses suddenly for a long time due to accidents, the pump will not be damaged. Once overloaded, the pump will automatically stop and possess a self-protection function. When the load recovers normally, it can also start automatically.

8. Simple structure and fewer wearing parts. This pump is simple in structure, installation, and maintenance. The medium conveyed by the pump will not touch the matched pneumatic valve and coupling lever, etc., unlike other kinds of pumps, whose performance will drop down gradually because of the damage to rotors, gears, and vanes.

1. It can transmit adhesive (with viscosity below 10,000 centipoise).
2. This pump does not need oil lubrication. Even if idling, it has no influence on the pump. This is a characteristic of this pump.

OPERATIONAL PRINCIPLE

There is a diaphragm installed in each of the two aligned working cavities (A) and (B), which are connected together by a central coupling lever. The compressed air enters the air distribution valve from the air entrance of the pump. The compressed air enters the cavity through the air distribution mechanism, pushing the diaphragm to move in the cavity. The gas in the other cavity will be drained. Once reaching the stroke terminal, the air distribution mechanism will automatically draw the compressed air into the other working cavity, pushing the diaphragm to move in the opposite direction, so as to make the two diaphragms continuously reciprocate in synchronism.

The compressed air enters the air distribution valve from (E) as shown in the diagram, causing the diaphragm to move towards the right. The suction force in chamber (A) allows the medium to flow in from the inlet (C), pushing the ball valve (2) to enter chamber (A), while ball valve (4) is locked due to the suction force. The medium in chamber (B) is pressed out through ball valve (3) and flows out from the outlet (D). Meanwhile, valve (I) is closed to prevent backflow. This cyclic movement allows the medium to be continuously sucked in from inlet (C) and discharged from outlet (D).

CONNECTION SCHEMATIC DIAGRAM

Note: Due to the stability of the gas supply and environmental factors, the parameters may have slight fluctuations or errors, which is normal.

Model	Cmax(GPM)	Hmax(m)	pressuse(kgf/cm2)	suckedlift(m)	Max grainDia(mm)	Max pressure(kgf/cm2)	MWP(pSI)	Air inletSize	Inlet andoutlet size
	08K-40L	44	69	6.9	5	4.5	7	115	1.5"
08Y4-50L	75	75	8.0	7	8.0	8	113	FNPT 1/4"	2.0"
08Y4-25L	22	73	8.0	7	4.0	8	100	FNPT 1/4"	1.0"
08Y4-25LF46	24	70	8.0	7	4.0	8	100	FNPT 1/4"	1.0"
08Y-15PP	2.5	50	6.0	5	1.0	7	80	FNPT 1/4"	1/2"
08K-15P	3	60	6.9	5	1.0	7	90	FNPT 1/4"	1/2"
08K-15	3	60	6.9	5	1.0	7	90	FNPT 1/4"	1/2"

QBY-10 Structural drawing
01.Outlet pipe	02.Ball sealer
03.Seal seat	04.Diaphragm vane
05.Intermediate	06.Connecting components
07.Copperroads	08.Pump body
09.Inlet pipe	10.Valve pluy
12.Admilion piece	13.Air distribution valve

FLANGE CONNECTION TYPE

QBY-50~100 Structural drawing
01. Admi Ion piece	02. Air distribution valve
03. Air distribution valve	04.Bail sealor
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inft pipe
11. Air outlet	12. Outlet pipe

Model	A	B	D5	D6	C	H	H1	H2	DHI	DN2	N-D1	N-D2	D3	D4	E	N-d4	Outside diameter or ink	Materials
OBY-10 (ZL104) (ICR18N9TI) (pp)		53	/	190	235	35	220	3/8"Threaded	/	/	/	/	/	12	/	8	(HT200)
OBY-15	135	53	/	190	235	35	220	1/2"Threaded	/	/	/	/	/	12	/	8
OBY-25	255	150	100	380	530	70		1"Threaded	4-Φ11	4-Φ11	75	75	55	4-Φ10	10	10
OBY-40	255	150	130	120	380	530	70		11/2"Threaded	4-Φ13.5	4-Φ13.5	100	90	55	4-Φ10	10
OBY-25	220	160	100	370	460	50	410	1"Threaded	4-Φ11	4-Φ11	75	75	80	4-Φ12	10
OBY-40	220	160	130	120	370	460		410	11/2"Threaded	11/4"Threaded	4-Φ13.5	100	90		4-Φ12	10
OBY-50	340	215	140	140	550	715	95		2"Range	4-Φ13.5	4-Φ13.5	110	110	145	4-Φ17.5	12
OBY-65	340	215	160	140	550	715	95		21⁄2"Range	4-Φ13.5	4-Φ13.5	130	130	145	4-Φ17.5	12
OBY-80	360	260	190	190	580	950	100		3"Range	4-Φ17.5	4-Φ17.5	150	150	130	4-Φ17.5	12
OBY-100	360	260	210	190	580	950	100		4"Range	3"Range	4-Φ17.5	4-Φ17.5	170	170	130	4-Φ17.5	12

Note: For QBY-10 and 15 models, the inlet and outlet of cast iron, aluminum, stainless steel, and plastic materials are threaded connections, not flanged. For QBY-25 and 40 models, the inlet and outlet of stainless steel and plastic materials are threaded connections, not flanged, while cast iron and aluminum alloy versions have both flanged and threaded connections. QBY-50/65/80/100 models are flanged only, with no threaded connections. (Please refer to the actual product catalog pictures.)

STRUCTURE DRAWING AND PARTS LIST

No.	Name	Qty	Material
1	Inlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
2	Outlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
3	Pump body	2	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
4	Pump chamber	2	Aluminium alloy, cast iron
5	Intermediate	1	Aluminium alloy
6	Diaphragm vane	2	PTFE
7	Diaphragm vane	2	Acrylonitrile butadiene rubber, polychloroprene
8	ntermediate sealgasket	2	Acrylonitrile butadiene rubber
9	Driving shaft housing	2	Plastic
10	Connecting rod shaft housing	2	Plastic
11	Piston bush	2	Plastic
12	Piston	2	Plastic
13	Slipper block	1	Aluminium alloy
14	Slipper block	1	Chromium-plated steel
15	Sealing slip ring	1	Plastic
16	Driving slipper block	1	Plastic
17	Cover plate	1	Aluminium alloy
18	Cover plate gasket	1	Rubber
19	Muffler	1	Plastic
20	Seal seat	4	Rubber
21	Seal seat	4	PTFE
22	Clamping bar	4	Stainless steel, carbon steel
23	Connecting rod	1	Stainless steel
24	Compression spring	1	Copper
25	Driving shaft	1	Stainless steel
26	Seal ring of driving shaft	2	Rubber
27	Y-type O-ring	4	Rubber
28	O-ring	1	Rubber
29	Butterfly-type O-ring	1	Rubber
30	Inlet nozzle	1	Copper
31	Ball sealer	4	Rubber
32	Ball sealer	4	Stainless steel, ceramic, PTFE

MATTERS NEEDING ATTENTION

1. If the pump vibration is very slight, there is generally no need to install foundation bolts. If the compressed air is mixed with dirt, it may affect the normal start of the pump. It is recommended that users install a pneumatic triple unit (filter, regulator, lubricator) additionally.
2. When pumping media that may easily freeze or deposit, please install a valve at the pump inlet. If the pump is to be stopped, first close the valve, then run the pump for a few minutes to empty the media inside and clean any accumulated liquid in time, to avoid difficulties in starting the pump next time.
3. When replacing the diaphragm, clean the connecting rod, the inner cavity, and the copper bush of the pump. Avoid damaging the white PTFE seal ring. Reassemble as originally, and the pump can be used.

Malfunction forms	Causes	Troubleshooting
No water comes out from the pump or the flow is insufficient.	1、The air pressure is insufficient.2、The flow channel of the pump cavity is blocked3、The valve is not opened	1、Add the air pressure 2、Open the pump cavity for cleaning 3、Open the valve
The pump stops its operation	1、The air distribution valve is damaged2、The diaphragm is damaged3、The muffler is blocked4、Air leakage occurs in the conn-eciting rod seal	1、Repair or replace the air distribution valve2、Replace the diaphragm3、Clean the muffler.4、Replace the connecting rod seal
The lift is too low	1、The suction valve is damaged2、The flow is too high3、The air pressure is too low	1、Shotten the pipe and reduce elbows2、Turn down the drain valve.3、Add the air pressure
The noise is too low	1、The muffler is broken	1、Add the air pressure.

Made In China

VEVOR®

TOUGH TOOLS, HALF PRICE

Technical Support and E-Warranty Certificate

www.vevor.com/support

VEVOR®

TOUGH TOOLS, HALF PRICE

We continue to be committed to providing you with tools at competitive prices. "Save Half", "Half Price", or any other similar expressions used by us only represent an estimate of savings you might benefit from buying certain tools with us compared to top brands, and does not necessarily mean that all categories of tools offered are covered. We kindly remind you to verify carefully when placing an order with us whether you are actually saving half in comparison with the top major brands.

VEVOR®

TOUGH TOOLS, HALF PRICE

Air Operated Double

Diaphragm Pump

MODEL: QBK-40L/QBY4-50L/QBY4-25L/QBY4-25LF46 /

QBY-15PP/QBK-15P/QBK-15

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

Technical Support and E-Warranty Certificate

www.vevor.com/support

This is the original instruction. Please read all manual instructions carefully before operating. VEVOR reserves a clear interpretation of the user manual. The appearance of the product shall be subject to the product you received. Please forgive us that we won't inform you of any technology or software updates on our product.

PRODUCT PRESENTATION

PERFORMANCE CHARACTERISTICS

Note: Affected by the stability of gas supply and the environment, the parameters may have certain fluctuations or errors, which is a normal phenomenon.

Model	Cmax(GPM)	Hmax(m)	pressuse(kgf/cm2)	suckedlift(m)	MaxgainDia(kgf/cm2)	Max pressure(pSI)	MWP	Pump
	(6PM)	(m)	(kgf/cm2)	(m)	(mm)
AIR Inlet outlet size							1.5"
OBK-40L	44	69	6.9	5	4.5	7	115	1.5"
OBY4-50L	75	75	8.0	7	8.0	8	113	2.0"
OBY4-25L	22	73	8.0	7	4.0	8	100	1.0"
OBY4-25L	24	70	8.0	7	4.0	8	100	1.0"
OBY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15P	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15P	3	60	6.9	5	1.0	7	90	1/2"
OBY-15P	3	60	6.9	5	1.0	7	90	1/2"
OBY-15	3	60	6.9	5	1.0	7	90	1/2"

QBK INSTALLATION SIZE CHART

QBY-10Structural drawing
01. Outlet pipe	02. Ball sealer
03. Seal seat	04. Diaphragm vane
05. Intermediate	06. Connecting components
07. Copperroads	08. Pump body
09. Inlet pipe	10. Valve play
12. Admi Ion piece	13. Air distribution valve

FLANGE CONNECTION TYPE

GBY-50~100 Structural drawing
01. Admi Ion piece	02. Air distribution valve
03. Air distribution valve	04.Bail sealar
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inft pipe
11. Air outlet	12. Outlet pipe

Model	A	B	D5	D6	C	H	H1	H2	DHI	DN2	N-D1	N-D2	D3	D4	E	N-d4	Outside diameter or ink	Materials
OBY-10 (ZL104) (ICR18N9TI) (pp)		53	/	190	235	35	220	3/8"Threaded	/	/	/	/	/	12	/	8	(HT200)
OBY-15	135	53	/	190	235	35	220	1/2"Threaded	/	/	/	/	/	12	/	8
OBY-25	255	150	100	380	530	70		1"Threaded	4-Φ11	4-Φ11	75	75	55	4-Φ10	10	10
OBY-40	255	150	130	120	380	530	70		11/2"Threaded	4-Φ13.5	4-Φ13.5	100	90	55	4-Φ10	10
OBY-25	220	160	100	370	460	50	410	1"Threaded	4-Φ11	4-Φ11	75	75	80	4-Φ12	10
OBY-40	220	160	130	120	370	460		410	11/2"Threaded	11/4"Threaded	4-Φ13.5	100	90		4-Φ12	10
OBY-50	340	215	140	140	550	715	95		2"Range	4-Φ13.5	4-Φ13.5	110	110	145	4-Φ17.5	12
OBY-65	340	215	160	140	550	715	95		21⁄2"Range	4-Φ13.5	4-Φ13.5	130	130	145	4-Φ17.5	12
OBY-80	360	260	190	190	580	950	100		3"Range	4-Φ17.5	4-Φ17.5	150	150	130	4-Φ17.5	12
OBY-100	360	260	210	190	580	950	100		4"Range	3"Range	4-Φ17.5	4-Φ17.5	170	170	130	4-Φ17.5	12

STRUCTURE DRAWING AND PARTS LIST

No.	Name	Qty	Material
1	Inlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
2	Outlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
3	Pump body	2	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
4	Pump chamber	2	Aluminium alloy, cast iron
5	Intermediate	1	Aluminium alloy
6	Diaphragm vane	2	PTFE
7	Diaphragm vane	2	Acrylonitrile butadiene rubber, polychloroprene
8	ntermediate sealgasket	2	Acrylonitrile butadiene rubber
9	Driving shaft housing	2	Plastic
10	Connecting rod shaft housing	2	Plastic
11	Piston bush	2	Plastic
12	Piston	2	Plastic
13	Slipper block	1	Aluminium alloy
14	Slipper block	1	Chromium-plated steel
15	Sealing slip ring	1	Plastic
16	Driving slipper block	1	Plastic
17	Cover plate	1	Aluminium alloy
18	Cover plate gasket	1	Rubber
19	Muffler	1	Plastic
20	Seal seat	4	Rubber
21	Seal seat	4	PTFE
22	Clamping bar	4	Stainless steel, carbon steel
23	Connecting rod	1	Stainless steel
24	Compression spring	1	Copper
25	Driving shaft	1	Stainless steel
26	Seal ring of driving shaft	2	Rubber
27	Y-type O-ring	4	Rubber
28	O-ring	1	Rubber
29	Butterfly-type O-ring	1	Rubber
30	Inlet nozzle	1	Copper
31	Ball sealer	4	Rubber
32	Ball sealer	4	Stainless steel, ceramic, PTFE

MATTERS NEED ATTENTION

Malfunction forms	Causes	Troubleshooting
No water comes out from the pump or the flow is insufficient.	1、The air pressure is insufficient.2、The flow channel of the pump cavity is blocked3、The valve is not opened	1、Add the air pressure 2、Open the pump cavity for cleaning 3、Open the valve
The pump stops its operation	1、The air distribution valve is damaged2、The diaphragm is damaged3、The muffler is blocked4、Air leakage occurs in the conn-eciting rod seal	1、Repair or replace the air distribution valve2、Replace the diaphragm3、Clean the muffler.4、Replace the connecting rod seal
The lift is too low	1、The suction valve is damaged2、The flow is too high3、The air pressure is too low	1、Shotten the pipe and reduce elbows2、Turn down the drain valve.3、Add the air pressure
The noise is too low	1、The muffler is broken	1、Add the air pressure.

Made in China

VEVOR®

TOUGH TOOLS, HALF PRICE

We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only represent of savings you might benefit from buying certain tools with us compared to top brands and does not necessarily mean to cover all categories of tools offered are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.

VEVOR®

TOUGH TOOLS, HALF PRICE

Air Operated Double Diaphragm Pump

MODEL: QBK-40L/QBY4-50L/QBY4-25L/QBY4-25LF46 / QBY-15PP/QBK-15P/QBK-15

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

Technical Support and E-Warranty Certificate www.vevor.com/support

This is the original instruction. Please read all manual instructions carefully before operating. VEVOR reserves a clear interpretation of the user manual. The appearance of the product shall be subject to the product you received. Please forgive us that we won't inform you if there are any technology or software updates on our product.

PRODUCT PRESENTATION

PERFORMANCE CHARACTERISTICS

Note: Affected by the stability of gas supply and the environment, the parameters may have certain fluctuations or errors, which is a normal phenomenon.

Model	Cmax(GPM)	Hmax(m)	pressuse(kgf/cm2)	suckedlift(m)	MaxgainDia(kgf/cm2)	Max pressure(pSI)	MWP	Pump
	(6PM)	(perssuse(m)	(kgf/cm2)	Dia(mm)
AIR Inletoutlet size							1.5"
OBS-40L	44	69	6.9	5	4.5	7	115	1.5"
OBSY4-50L	75	75	8.0	7	8.0	8	113	2.0"
OBSY4-25L	22	73	8.0	7	4.0	8	100	1.0"
OBSY4-25LF46	24	70	8.0	7	4.0	8	100	1.0"
OBSY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBSK-15P	3	60	6.9	5	1.0	7	90	1/2"
OBSK-15	3	60	6.9	5	1.0	7	90	1/2"

QBK INSTALLATION SIZE CHART

QBY-10Structural drawing
01. Outlet pipe	02. Ball sealer
03. Seal seat	04. Diaphragm vane
05. Intermediate	06. Connecting components
07. Copperroads	08. Pump body
09. Inlet pipe	10. Valve play
12. Admi Ion piece	13. Air distribution valve

FLANGE CONNECTION TYPE

GBY-50~100 Structural drawing
01. Admi Ion piece	02. Air distribution valve
03. Air distribution valve	04.Bail sealar
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inft pipe
11. Air outlet	12. Outlet pipe

Model	A	B	D5	D6	C	H	H1	H2	DHI	DN2	N-D1	N-D2	D3	D4	E	N-d4	Outside diameter or ink	Materials
OBY-10 (ZL104) (ICR18N9TI) (pp)		53	/	190	235	35	220	3/8"Threaded	/	/	/	/	/	12	/	8	(HT200)
OBY-15	135	53	/	190	235	35	220	1/2"Threaded	/	/	/	/	/	12	/	8
OBY-25	255	150	100	380	530	70		1"Threaded	4-Φ11	4-Φ11	75	75	55	4-Φ10	10	10
OBY-40	255	150	130	120	380	530	70		11/2"Threaded	4-Φ13.5	4-Φ13.5	100	90	55	4-Φ10	10
OBY-25	220	160	100	370	460	50	410	1"Threaded	4-Φ11	4-Φ11	75	75	80	4-Φ12	10
OBY-40	220	160	130	120	370	460		410	11/2"Threaded	11/4"Threaded	4-Φ13.5	100	90		4-Φ12	10
OBY-50	340	215	140	140	550	715	95		2"Range	4-Φ13.5	4-Φ13.5	110	110	145	4-Φ17.5	12
OBY-65	340	215	160	140	550	715	95		21⁄2"Range	4-Φ13.5	4-Φ13.5	130	130	145	4-Φ17.5	12
OBY-80	360	260	190	190	580	950	100		3"Range	4-Φ17.5	4-Φ17.5	150	150	130	4-Φ17.5	12
OBY-100	360	260	210	190	580	950	100		4"Range	3"Range	4-Φ17.5	4-Φ17.5	170	170	130	4-Φ17.5	12

STRUCTURE DRAWING AND PARTS LIST

No.	Name	Qty	Material
1	Inlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
2	Outlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
3	Pump body	2	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
4	Pump chamber	2	Aluminium alloy, cast iron
5	Intermediate	1	Aluminium alloy
6	Diaphragm vane	2	PTFE
7	Diaphragm vane	2	Acrylonitrile butadiene rubber, polychloroprene
8	ntermediate sealgasket	2	Acrylonitrile butadiene rubber
9	Driving shaft housing	2	Plastic
10	Connecting rod shaft housing	2	Plastic
11	Piston bush	2	Plastic
12	Piston	2	Plastic
13	Slipper block	1	Aluminium alloy
14	Slipper block	1	Chromium-plated steel
15	Sealing slip ring	1	Plastic
16	Driving slipper block	1	Plastic
17	Cover plate	1	Aluminium alloy
18	Cover plate gasket	1	Rubber
19	Muffler	1	Plastic
20	Seal seat	4	Rubber
21	Seal seat	4	PTFE
22	Clamping bar	4	Stainless steel, carbon steel
23	Connecting rod	1	Stainless steel
24	Compression spring	1	Copper
25	Driving shaft	1	Stainless steel
26	Seal ring of driving shaft	2	Rubber
27	Y-type O-ring	4	Rubber
28	O-ring	1	Rubber
29	Butterfly-type O-ring	1	Rubber
30	Inlet nozzle	1	Copper
31	Ball sealer	4	Rubber
32	Ball sealer	4	Stainless steel, ceramic, PTFE

MATTERS NEED ATTENTION

Malfunction forms	Causes	Troubleshooting
No water comes out from the pump or the flow is insufficient.	1、The air pressure is insufficient.2、The flow channel of the pump cavity is blocked3、The valve is not opened	1、Add the air pressure 2、Open the pump cavity for cleaning 3、Open the valve
The pump stops its operation	1、The air distribution valve is damaged2、The diaphragm is damaged3、The muffler is blocked4、Air leakage occurs in the conn-eciting rod seal	1、Repair or replace the air distribution valve2、Replace the diaphragm3、Clean the muffler.4、Replace the connecting rod seal
The lift is too low	1、The suction valve is damaged2、The flow is too high3、The air pressure is too low	1、Shotten the pipe and reduce elbows2、Turn down the drain valve.3、Add the air pressure
The noise is too low	1、The muffler is broken	1、Add the air pressure.

www.vevor.com/support

VEVOR®

TOUGH TOOLS, HALF PRICE

We continue to be committed to providing you with tools at competitive prices. "Save Half", "Half Price" or any other similar expressions used by us only represent an estimate of savings you might benefit from buying certain tools with us compared to top brands and does not necessarily mean to cover all categories of tools offered. We kindly remind you to verify carefully when placing an order with us that you are actually saving half in comparison with the top major brands.

VEVOR®

TOUGH TOOLS, HALF PRICE

Air Operated Double

Diaphragm Pump

MODEL: QBK-40L/QBY4-50L/QBY4-25L/QBY4-25LF46 /

QBY-15PP/QBK-15P/QBK-15

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

Technical Support and E-Warranty Certificate

www.vevor.com/support

This is the original instruction. Please read all manual instructions carefully before operating. VEVOR reserves the right to interpret the user manual. The appearance of the product shall be subject to the product you received. Please forgive us that we won't inform you of any technology or software updates on our product.

PRODUCT PRESENTATION

PERFORMANCE CHARACTERISTICS

Note: Affected by the stability of gas supply and the environment, the parameters may have certain fluctuations or errors, which is a normal phenomenon.

Model	Cmax(GPM)	Hmax(m)	pressuse(kgf/cm2)	suckedlift(m)	MaxgainDia(kgf/cm2)	Max pressure(pSI)	MWP	Pump
	(6PM)	(m)	(kgf/cm2)	(m)	(mm)
AIR Inlet outlet size							1.5"
OBK-40L	44	69	6.9	5	4.5	7	115	1.5"
OBY4-50L	75	75	8.0	7	8.0	8	113	2.0"
OBY4-25L	22	73	8.0	7	4.0	8	100	1.0"
OBY4-25L	24	70	8.0	7	4.0	8	100	1.0"
OBY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15P	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15P	3	60	6.9	5	1.0	7	90	1/2"
OBY-15P	3	60	6.9	5	1.0	7	90	1/2"
OBY-15	3	60	6.9	5	1.0	7	90	1/2"

QBK INSTALLATION SIZE CHART

QBY-10Structural drawing
01. Outlet pipe	02. Ball sealer
03. Seal seat	04. Diaphragm vane
05. Intermediate	06. Connecting components
07. Copperroads	08. Pump body
09. Inlet pipe	10. Valve play
12. Admi Ion piece	13. Air distribution valve

FLANGE CONNECTION TYPE

GBY-50~100 Structural drawing
01. Admi Ion piece	02. Air distribution valve
03. Air distribution valve	04.Bail sealar
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inft pipe
11. Air outlet	12. Outlet pipe

Model	A	B	D5	D6	C	H	H1	H2	DHI	DN2	N-D1	N-D2	D3	D4	E	N-d4	Outside diameter or ink	Materials
OBY-10 (ZL104) (ICR18N9TI) (pp)		53	/	190	235	35	220	3/8"Threaded	/	/	/	/	/	12	/	8	(HT200)
OBY-15	135	53	/	190	235	35	220	1/2"Threaded	/	/	/	/	/	12	/	8
OBY-25	255	150	100	380	530	70		1"Threaded	4-Φ11	4-Φ11	75	75	55	4-Φ10	10	10
OBY-40	255	150	130	120	380	530	70		11/2"Threaded	4-Φ13.5	4-Φ13.5	100	90	55	4-Φ10	10
OBY-25	220	160	100	370	460	50	410	1"Threaded	4-Φ11	4-Φ11	75	75	80	4-Φ12	10
OBY-40	220	160	130	120	370	460		410	11/2"Threaded	11/4"Threaded	4-Φ13.5	100	90		4-Φ12	10
OBY-50	340	215	140	140	550	715	95		2"Range	4-Φ13.5	4-Φ13.5	110	110	145	4-Φ17.5	12
OBY-65	340	215	160	140	550	715	95		21⁄2"Range	4-Φ13.5	4-Φ13.5	130	130	145	4-Φ17.5	12
OBY-80	360	260	190	190	580	950	100		3"Range	4-Φ17.5	4-Φ17.5	150	150	130	4-Φ17.5	12
OBY-100	360	260	210	190	580	950	100		4"Range	3"Range	4-Φ17.5	4-Φ17.5	170	170	130	4-Φ17.5	12

STRUCTURE DRAWING AND PARTS LIST

No.	Name	Qty	Material
1	Inlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
2	Outlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
3	Pump body	2	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
4	Pump chamber	2	Aluminium alloy, cast iron
5	Intermediate	1	Aluminium alloy
6	Diaphragm vane	2	PTFE
7	Diaphragm vane	2	Acrylonitrile butadiene rubber, polychloroprene
8	ntermediate sealgasket	2	Acrylonitrile butadiene rubber
9	Driving shaft housing	2	Plastic
10	Connecting rod shaft housing	2	Plastic
11	Piston bush	2	Plastic
12	Piston	2	Plastic
13	Slipper block	1	Aluminium alloy
14	Slipper block	1	Chromium-plated steel
15	Sealing slip ring	1	Plastic
16	Driving slipper block	1	Plastic
17	Cover plate	1	Aluminium alloy
18	Cover plate gasket	1	Rubber
19	Muffler	1	Plastic
20	Seal seat	4	Rubber
21	Seal seat	4	PTFE
22	Clamping bar	4	Stainless steel, carbon steel
23	Connecting rod	1	Stainless steel
24	Compression spring	1	Copper
25	Driving shaft	1	Stainless steel
26	Seal ring of driving shaft	2	Rubber
27	Y-type O-ring	4	Rubber
28	O-ring	1	Rubber
29	Butterfly-type O-ring	1	Rubber
30	Inlet nozzle	1	Copper
31	Ball sealer	4	Rubber
32	Ball sealer	4	Stainless steel, ceramic, PTFE

MATTERS NEED ATTENTION

Malfunction forms	Causes	Troubleshooting
No water comes out from the pump or the flow is insufficient.	1、The air pressure is insufficient.2、The flow channel of the pump cavity is blocked3、The valve is not opened	1、Add the air pressure 2、Open the pump cavity for cleaning 3、Open the valve
The pump stops its operation	1、The air distribution valve is damaged2、The diaphragm is damaged3、The muffler is blocked4、Air leakage occurs in the conn-eciting rod seal	1、Repair or replace the air distribution valve2、Replace the diaphragm3、Clean the muffler.4、Replace the connecting rod seal
The lift is too low	1、The suction valve is damaged2、The flow is too high3、The air pressure is too low	1、Shotten the pipe and reduce elbows2、Turn down the drain valve.3、Add the air pressure
The noise is too low	1、The muffler is broken	1、Add the air pressure.

Made in China

VEVOR®

TOUGH TOOLS, HALF PRICE

www.vevor.com/support

VEVOR®

TOUGH TOOLS, HALF PRICE

We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only represent of savings you might benefit from buying certain tools with us compared to top brands and does not necessarily mean to cover all categories of tools offered are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.

VEVOR®

TOUGH TOOLS, HALF PRICE

Air Operated Double

Diaphragm Pump

MODELO: QBK-40L/QBY4-50L/QBY4-25L/QBY4-25LF46 /

QBY-15PP/QBK-15P/QBK-15

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

Technical Support and E-Warranty Certificate

www.vevor.com/support

This is the original instruction. Please read all manual instructions carefully before operating. VEVOR reserves a clear interpretation of the user manual. The appearance of the product shall be subject to the product you received. Please forgive us that we won't inform you if there are any technology or software updates on our product.

PRODUCT PRESENTATION

PERFORMANCE CHARACTERISTICS

Note: Affected by the stability of gas supply and the environment, the parameters may have certain fluctuations or errors, which is a normal phenomenon.

Model	Cmax(GPM)	Hmax(m)	pressuse(kgf/cm2)	suckedlift(m)	MaxgainDia(kgf/cm2)	Max pressure(pSI)	MWP	Pump
	(6PM)	(perssuse(m)	(kgf/cm2)	(Dia(mm))	(kgf/cm2)
OBR-40L	44	69	6.9	5	4.5	7	115	1.5"
OBR4-50L	75	75	8.0	7	8.0	8	113	2.0"
OBR4-25L	22	73	8.0	7	4.0	8	100	1.0"
OBRY4-25LF46	24	70	8.0	7	4.0	8	100	1.0"
OBRY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBR-15P	3	60	6.9	5	1.0	7	90	1/2"
OBR-15	3	60	6.9	5	1.0	7	90	1/2"

QBK INSTALLATION SIZE CHART

QBY-10Structural drawing
01. Outlet pipe	02. Ball sealer
03. Seal seat	04. Diaphragm vane
05. Intermediate	06. Connecting components
07. Copperroads	08. Pump body
09. Inlet pipe	10. Valve play
12. Admi Ion piece	13. Air distribution valve

FLANGE CONNECTION TYPE

GBY-50~100 Structural drawing
01. Admi Ion piece	02. Air distribution valve
03. Air distribution valve	04.Bail sealar
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inft pipe
11. Air outlet	12. Outlet pipe

Model	A	B	D5	D6	C	H	H1	H2	DHI	DN2	N-D1	N-D2	D3	D4	E	N-d4	Outside diameter or ink	Materials
OBY-10 (ZL104) (ICR18N9TI) (pp)		53	/	190	235	35	220	3/8"Threaded	/	/	/	/	/	12	/	8	(HT200)
OBY-15	135	53	/	190	235	35	220	1/2"Threaded	/	/	/	/	/	12	/	8
OBY-25	255	150	100	380	530	70		1"Threaded	4-Φ11	4-Φ11	75	75	55	4-Φ10	10	10
OBY-40	255	150	130	120	380	530	70		11/2"Threaded	4-Φ13.5	4-Φ13.5	100	90	55	4-Φ10	10
OBY-25	220	160	100	370	460	50	410	1"Threaded	4-Φ11	4-Φ11	75	75	80	4-Φ12	10
OBY-40	220	160	130	120	370	460		410	11/2"Threaded	11/4"Threaded	4-Φ13.5	100	90		4-Φ12	10
OBY-50	340	215	140	140	550	715	95		2"Range	4-Φ13.5	4-Φ13.5	110	110	145	4-Φ17.5	12
OBY-65	340	215	160	140	550	715	95		21⁄2"Range	4-Φ13.5	4-Φ13.5	130	130	145	4-Φ17.5	12
OBY-80	360	260	190	190	580	950	100		3"Range	4-Φ17.5	4-Φ17.5	150	150	130	4-Φ17.5	12
OBY-100	360	260	210	190	580	950	100		4"Range	3"Range	4-Φ17.5	4-Φ17.5	170	170	130	4-Φ17.5	12

STRUCTURE DRAWING AND PARTS LIST

No.	Name	Qty	Material
1	Inlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
2	Outlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
3	Pump body	2	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
4	Pump chamber	2	Aluminium alloy, cast iron
5	Intermediate	1	Aluminium alloy
6	Diaphragm vane	2	PTFE
7	Diaphragm vane	2	Acrylonitrile butadiene rubber, polychloroprene
8	ntermediate sealgasket	2	Acrylonitrile butadiene rubber
9	Driving shaft housing	2	Plastic
10	Connecting rod shaft housing	2	Plastic
11	Piston bush	2	Plastic
12	Piston	2	Plastic
13	Slipper block	1	Aluminium alloy
14	Slipper block	1	Chromium-plated steel
15	Sealing slip ring	1	Plastic
16	Driving slipper block	1	Plastic
17	Cover plate	1	Aluminium alloy
18	Cover plate gasket	1	Rubber
19	Muffler	1	Plastic
20	Seal seat	4	Rubber
21	Seal seat	4	PTFE
22	Clamping bar	4	Stainless steel, carbon steel
23	Connecting rod	1	Stainless steel
24	Compression spring	1	Copper
25	Driving shaft	1	Stainless steel
26	Seal ring of driving shaft	2	Rubber
27	Y-type O-ring	4	Rubber
28	O-ring	1	Rubber
29	Butterfly-type O-ring	1	Rubber
30	Inlet nozzle	1	Copper
31	Ball sealer	4	Rubber
32	Ball sealer	4	Stainless steel, ceramic, PTFE

MATTERS NEED ATTENTION

Malfunction forms	Causes	Troubleshooting
No water comes out from the pump or the flow is insufficient.	1、The air pressure is insufficient.2、The flow channel of the pump cavity is blocked3、The valve is not opened	1、Add the air pressure 2、Open the pump cavity for cleaning 3、Open the valve
The pump stops its operation	1、The air distribution valve is damaged2、The diaphragm is damaged3、The muffler is blocked4、Air leakage occurs in the conn-eciting rod seal	1、Repair or replace the air distribution valve2、Replace the diaphragm3、Clean the muffler.4、Replace the connecting rod seal
The lift is too low	1、The suction valve is damaged2、The flow is too high3、The air pressure is too low	1、Shotten the pipe and reduce elbows2、Turn down the drain valve.3、Add the air pressure
The noise is too low	1、The muffler is broken	1、Add the air pressure.

Made in China

VEVOR®

TOUGH TOOLS, HALF PRICE

www.vevor.com/support

VEVOR®

TOUGH TOOLS, HALF PRICE

We continue to be committed to providing you with tools at competitive prices. "Save Half", "Half Price", or any other similar expressions used by us only represent an estimate of savings you might benefit from buying certain tools with us compared to top brands, and does not necessarily mean that all categories of tools offered are covered. We kindly remind you to verify carefully when placing an order with us that you are actually saving half in comparison with the top major brands.

VEVOR®

TOUGH TOOLS, HALF PRICE

Air Operated Double Diaphragm Pump

MODEL: QBK-40L/QBY4-50L/QBY4-25L/QBY4-25LF46 / QBY-15PP/QBK-15P/QBK-15

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

Technical Support and E-Warranty Certificate www.vevor.com/support

This is the original instruction. Please read all manual instructions carefully before operating. VEVOR reserves the right to interpret the user manual. The appearance of the product shall be subject to the product you received. Please forgive us that we won't inform you of any technology or software updates on our product.

PRODUCT PRESENTATION

PERFORMANCE CHARACTERISTICS

Note: Affected by the stability of gas supply and the environment, the parameters may have certain fluctuations or errors, which is a normal phenomenon.

Model	Cmax(GPM)	Hmax(m)	pressuse(kgf/cm2)	suckedlift(m)	MaxgainDia(kgf/cm2)	Max pressure(pSI)	MWP	Pump
	(6PM)	(perssuse(m)	(kgf/cm2)	(Dia(mm))	(kgf/cm2)
OBR-40L	44	69	6.9	5	4.5	7	115	1.5"
OBR4-50L	75	75	8.0	7	8.0	8	113	2.0"
OBR4-25L	22	73	8.0	7	4.0	8	100	1.0"
OBRY4-25LF46	24	70	8.0	7	4.0	8	100	1.0"
OBRY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBR-15P	3	60	6.9	5	1.0	7	90	1/2"
OBR-15	3	60	6.9	5	1.0	7	90	1/2"

QBK INSTALLATION SIZE CHART

QBY-10Structural drawing
01. Outlet pipe	02. Ball sealer
03. Seal seat	04. Diaphragm vane
05. Intermediate	06. Connecting components
07. Copperroads	08. Pump body
09. Inlet pipe	10. Valve play
12. Admi Ion piece	13. Air distribution valve

FLANGE CONNECTION TYPE

GBY-50~100 Structural drawing
01. Admi Ion piece	02. Air distribution valve
03. Air distribution valve	04.Bail sealar
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inft pipe
11. Air outlet	12. Outlet pipe

Model	A	B	D5	D6	C	H	H1	H2	DHI	DN2	N-D1	N-D2	D3	D4	E	N-d4	Outside diameter or ink	Materials
OBY-10 (ZL104) (ICR18N9TI) (pp)		53	/	190	235	35	220	3/8"Threaded	/	/	/	/	/	12	/	8	(HT200)
OBY-15	135	53	/	190	235	35	220	1/2"Threaded	/	/	/	/	/	12	/	8
OBY-25	255	150	100	380	530	70		1"Threaded	4-Φ11	4-Φ11	75	75	55	4-Φ10	10	10
OBY-40	255	150	130	120	380	530	70		11/2"Threaded	4-Φ13.5	4-Φ13.5	100	90	55	4-Φ10	10
OBY-25	220	160	100	370	460	50	410	1"Threaded	4-Φ11	4-Φ11	75	75	80	4-Φ12	10
OBY-40	220	160	130	120	370	460		410	11/2"Threaded	11/4"Threaded	4-Φ13.5	100	90		4-Φ12	10
OBY-50	340	215	140	140	550	715	95		2"Range	4-Φ13.5	4-Φ13.5	110	110	145	4-Φ17.5	12
OBY-65	340	215	160	140	550	715	95		21⁄2"Range	4-Φ13.5	4-Φ13.5	130	130	145	4-Φ17.5	12
OBY-80	360	260	190	190	580	950	100		3"Range	4-Φ17.5	4-Φ17.5	150	150	130	4-Φ17.5	12
OBY-100	360	260	210	190	580	950	100		4"Range	3"Range	4-Φ17.5	4-Φ17.5	170	170	130	4-Φ17.5	12

STRUCTURE DRAWING AND PARTS LIST

No.	Name	Qty	Material
1	Inlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
2	Outlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
3	Pump body	2	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
4	Pump chamber	2	Aluminium alloy, cast iron
5	Intermediate	1	Aluminium alloy
6	Diaphragm vane	2	PTFE
7	Diaphragm vane	2	Acrylonitrile butadiene rubber, polychloroprene
8	ntermediate sealgasket	2	Acrylonitrile butadiene rubber
9	Driving shaft housing	2	Plastic
10	Connecting rod shaft housing	2	Plastic
11	Piston bush	2	Plastic
12	Piston	2	Plastic
13	Slipper block	1	Aluminium alloy
14	Slipper block	1	Chromium-plated steel
15	Sealing slip ring	1	Plastic
16	Driving slipper block	1	Plastic
17	Cover plate	1	Aluminium alloy
18	Cover plate gasket	1	Rubber
19	Muffler	1	Plastic
20	Seal seat	4	Rubber
21	Seal seat	4	PTFE
22	Clamping bar	4	Stainless steel, carbon steel
23	Connecting rod	1	Stainless steel
24	Compression spring	1	Copper
25	Driving shaft	1	Stainless steel
26	Seal ring of driving shaft	2	Rubber
27	Y-type O-ring	4	Rubber
28	O-ring	1	Rubber
29	Butterfly-type O-ring	1	Rubber
30	Inlet nozzle	1	Copper
31	Ball sealer	4	Rubber
32	Ball sealer	4	Stainless steel, ceramic, PTFE

MATTERS NEED ATTENTION

Malfunction forms	Causes	Troubleshooting
No water comes out from the pump or the flow is insufficient.	1、The air pressure is insufficient.2、The flow channel of the pump cavity is blocked3、The valve is not opened	1、Add the air pressure 2、Open the pump cavity for cleaning 3、Open the valve
The pump stops its operation	1、The air distribution valve is damaged2、The diaphragm is damaged3、The muffler is blocked4、Air leakage occurs in the conn-eciting rod seal	1、Repair or replace the air distribution valve2、Replace the diaphragm3、Clean the muffler.4、Replace the connecting rod seal
The lift is too low	1、The suction valve is damaged2、The flow is too high3、The air pressure is too low	1、Shotten the pipe and reduce elbows2、Turn down the drain valve.3、Add the air pressure
The noise is too low	1、The muffler is broken	1、Add the air pressure.

www.vevor.com/support

VEVOR®

TOUGH TOOLS, HALF PRICE

Technical Support and e-Warranty Certificate www.vevor.com/support

We continue to be committed to providing you with tools at competitive prices. "Save Half," "Half Price," or any other similar expressions used by us only represent the savings you might benefit from buying certain tools with us compared to top brands and do not necessarily mean to cover all categories of tools offered. We kindly remind you to verify carefully when placing an order with us whether you are actually saving half in comparison with the top major brands.

VEVOR®

TOUGH TOOLS, HALF PRICE

Air Operated Double Diaphragm Pump

MODEL: QBK-40L/QBY4-50L/QBY4-25L/QBY4-25LF46 / QBY-15PP/QBK-15P/QBK-15

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

Technical Support and E-Warranty Certificate www.vevor.com/support

This is the original instruction. Please read all manual instructions carefully before operating. VEVOR reserves a clear interpretation of the user manual. The appearance of the product shall be subject to the product you received. Please forgive us that we won't inform you of any technology or software updates on our product.

PRODUCT PRESENTATION

PERFORMANCE CHARACTERISTICS

Note: Affected by the stability of gas supply and the environment, the parameters may have certain fluctuations or errors, which is a normal phenomenon.

Model	Cmax(GPM)	Hmax(m)	pressuse(kgf/cm2)	suckedlift(m)	MaxgainDia(kgf/cm2)	Max pressure(pSI)	MWP	Pump
	(6PM)	(perssuse(m)	(kgf/cm2)	(Dia(mm))	(kgf/cm2)
OBR-40L	44	69	6.9	5	4.5	7	115	1.5"
OBR4-50L	75	75	8.0	7	8.0	8	113	2.0"
OBR4-25L	22	73	8.0	7	4.0	8	100	1.0"
OBRY4-25LF46	24	70	8.0	7	4.0	8	100	1.0"
OBRY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBR-15P	3	60	6.9	5	1.0	7	90	1/2"
OBR-15	3	60	6.9	5	1.0	7	90	1/2"

QBK INSTALLATION SIZE CHART

QBY-10Structural drawing
01. Outlet pipe	02. Ball sealer
03. Seal seat	04. Diaphragm vane
05. Intermediate	06. Connecting components
07. Copperroads	08. Pump body
09. Inlet pipe	10. Valve play
12. Admi Ion piece	13. Air distribution valve

FLANGE CONNECTION TYPE

GBY-50~100 Structural drawing
01. Admi Ion piece	02. Air distribution valve
03. Air distribution valve	04.Bail sealar
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inft pipe
11. Air outlet	12. Outlet pipe

Model	A	B	D5	D6	C	H	H1	H2	DHI	DN2	N-D1	N-D2	D3	D4	E	N-d4	Outside diameter or ink	Materials
OBY-10 (ZL104) (ICR18N9TI) (pp)		53	/	190	235	35	220	3/8"Threaded	/	/	/	/	/	12	/	8	(HT200)
OBY-15	135	53	/	190	235	35	220	1/2"Threaded	/	/	/	/	/	12	/	8
OBY-25	255	150	100	380	530	70		1"Threaded	4-Φ11	4-Φ11	75	75	55	4-Φ10	10	10
OBY-40	255	150	130	120	380	530	70		11/2"Threaded	4-Φ13.5	4-Φ13.5	100	90	55	4-Φ10	10
OBY-25	220	160	100	370	460	50	410	1"Threaded	4-Φ11	4-Φ11	75	75	80	4-Φ12	10
OBY-40	220	160	130	120	370	460		410	11/2"Threaded	11/4"Threaded	4-Φ13.5	100	90		4-Φ12	10
OBY-50	340	215	140	140	550	715	95		2"Range	4-Φ13.5	4-Φ13.5	110	110	145	4-Φ17.5	12
OBY-65	340	215	160	140	550	715	95		21⁄2"Range	4-Φ13.5	4-Φ13.5	130	130	145	4-Φ17.5	12
OBY-80	360	260	190	190	580	950	100		3"Range	4-Φ17.5	4-Φ17.5	150	150	130	4-Φ17.5	12
OBY-100	360	260	210	190	580	950	100		4"Range	3"Range	4-Φ17.5	4-Φ17.5	170	170	130	4-Φ17.5	12

STRUCTURE DRAWING AND PARTS LIST

No.	Name	Qty	Material
1	Inlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
2	Outlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
3	Pump body	2	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
4	Pump chamber	2	Aluminium alloy, cast iron
5	Intermediate	1	Aluminium alloy
6	Diaphragm vane	2	PTFE
7	Diaphragm vane	2	Acrylonitrile butadiene rubber, polychloroprene
8	ntermediate sealgasket	2	Acrylonitrile butadiene rubber
9	Driving shaft housing	2	Plastic
10	Connecting rod shaft housing	2	Plastic
11	Piston bush	2	Plastic
12	Piston	2	Plastic
13	Slipper block	1	Aluminium alloy
14	Slipper block	1	Chromium-plated steel
15	Sealing slip ring	1	Plastic
16	Driving slipper block	1	Plastic
17	Cover plate	1	Aluminium alloy
18	Cover plate gasket	1	Rubber
19	Muffler	1	Plastic
20	Seal seat	4	Rubber
21	Seal seat	4	PTFE
22	Clamping bar	4	Stainless steel, carbon steel
23	Connecting rod	1	Stainless steel
24	Compression spring	1	Copper
25	Driving shaft	1	Stainless steel
26	Seal ring of driving shaft	2	Rubber
27	Y-type O-ring	4	Rubber
28	O-ring	1	Rubber
29	Butterfly-type O-ring	1	Rubber
30	Inlet nozzle	1	Copper
31	Ball sealer	4	Rubber
32	Ball sealer	4	Stainless steel, ceramic, PTFE

MATTERS NEED ATTENTION

Malfunction forms	Causes	Troubleshooting
No water comes out from the pump or the flow is insufficient.	1、The air pressure is insufficient.2、The flow channel of the pump cavity is blocked3、The valve is not opened	1、Add the air pressure 2、Open the pump cavity for cleaning 3、Open the valve
The pump stops its operation	1、The air distribution valve is damaged2、The diaphragm is damaged3、The muffler is blocked4、Air leakage occurs in the conn-eciting rod seal	1、Repair or replace the air distribution valve2、Replace the diaphragm3、Clean the muffler.4、Replace the connecting rod seal
The lift is too low	1、The suction valve is damaged2、The flow is too high3、The air pressure is too low	1、Shotten the pipe and reduce elbows2、Turn down the drain valve.3、Add the air pressure
The noise is too low	1、The muffler is broken	1、Add the air pressure.

We continue to be committed to providing you with tools at competitive prices. "Save Half", "Half Price", or any other similar expressions used by us only represent savings you might benefit from buying certain tools with us compared to top brands, and do not necessarily mean that all categories of tools offered are covered. We kindly remind you to verify carefully when placing an order with us that you are actually saving half in comparison with the top major brands.

VEVOR®

TOUGH TOOLS, HALF PRICE

Air Operated Double Diaphragm Pump

MODEL: QBK-40L/QBY4-50L/QBY4-25L/QBY4-25LF46 / QBY-15PP/QBK-15P/QBK-15

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

Technical Support and E-Warranty Certificate www.vevor.com/support

This is the original instruction. Please read all manual instructions carefully before operating. VEVOR reserves the right to interpret the user manual. The appearance of the product shall be subject to the product you received. Please forgive us that we won't inform you of any technology or software updates on our product.

PRODUCT PRESENTATION

PERFORMANCE CHARACTERISTICS

Note: Affected by the stability of gas supply and the environment, the parameters may have certain fluctuations or errors, which is a normal phenomenon.

Model	Cmax(GPM)	Hmax(m)	pressuse(kgf/cm2)	suckedlift(m)	MaxgainDia(kgf/cm2)	Max pressure(pSI)	MWP	Pump
	(6PM)	(m)	(kgf/cm2)	(m)	(mm)
AIR Inlet outlet size							1.5"
OBK-40L	44	69	6.9	5	4.5	7	115	1.5"
OBY4-50L	75	75	8.0	7	8.0	8	113	2.0"
OBY4-25L	22	73	8.0	7	4.0	8	100	1.0"
OBY4-25L	24	70	8.0	7	4.0	8	100	1.0"
OBY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15PP	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15P	2.5	50	6.0	5	1.0	7	80	1/2"
OBY-15P	3	60	6.9	5	1.0	7	90	1/2"
OBY-15P	3	60	6.9	5	1.0	7	90	1/2"
OBY-15	3	60	6.9	5	1.0	7	90	1/2"

QBK INSTALLATION SIZE CHART

QBY-10Structural drawing
01. Outlet pipe	02. Ball sealer
03. Seal seat	04. Diaphragm vane
05. Intermediate	06. Connecting components
07. Copperroads	08. Pump body
09. Inlet pipe	10. Valve play
12. Admi Ion piece	13. Air distribution valve

FLANGE CONNECTION TYPE

GBY-50~100 Structural drawing
01. Admi Ion piece	02. Air distribution valve
03. Air distribution valve	04.Bail sealar
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inft pipe
11. Air outlet	12. Outlet pipe

Model	A	B	D5	D6	C	H	H1	H2	DHI	DN2	N-D1	N-D2	D3	D4	E	N-d4	Outside diameter or ink	Materials
OBY-10 (ZL104) (ICR18N9TI) (pp)		53	/	190	235	35	220	3/8"Threaded	/	/	/	/	/	12	/	8	(HT200)
OBY-15	135	53	/	190	235	35	220	1/2"Threaded	/	/	/	/	/	12	/	8
OBY-25	255	150	100	380	530	70		1"Threaded	4-Φ11	4-Φ11	75	75	55	4-Φ10	10	10
OBY-40	255	150	130	120	380	530	70		11/2"Threaded	4-Φ13.5	4-Φ13.5	100	90	55	4-Φ10	10
OBY-25	220	160	100	370	460	50	410	1"Threaded	4-Φ11	4-Φ11	75	75	80	4-Φ12	10
OBY-40	220	160	130	120	370	460		410	11/2"Threaded	11/4"Threaded	4-Φ13.5	100	90		4-Φ12	10
OBY-50	340	215	140	140	550	715	95		2"Range	4-Φ13.5	4-Φ13.5	110	110	145	4-Φ17.5	12
OBY-65	340	215	160	140	550	715	95		21⁄2"Range	4-Φ13.5	4-Φ13.5	130	130	145	4-Φ17.5	12
OBY-80	360	260	190	190	580	950	100		3"Range	4-Φ17.5	4-Φ17.5	150	150	130	4-Φ17.5	12
OBY-100	360	260	210	190	580	950	100		4"Range	3"Range	4-Φ17.5	4-Φ17.5	170	170	130	4-Φ17.5	12

STRUCTURE DRAWING AND PARTS LIST

No.	Name	Qty	Material
1	Inlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
2	Outlet pipe	1	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
3	Pump body	2	Stainless steel, cast iron, aluminium alloy, plastic, inner lining FEP
4	Pump chamber	2	Aluminium alloy, cast iron
5	Intermediate	1	Aluminium alloy
6	Diaphragm vane	2	PTFE
7	Diaphragm vane	2	Acrylonitrile butadiene rubber, polychloroprene
8	ntermediate sealgasket	2	Acrylonitrile butadiene rubber
9	Driving shaft housing	2	Plastic
10	Connecting rod shaft housing	2	Plastic
11	Piston bush	2	Plastic
12	Piston	2	Plastic
13	Slipper block	1	Aluminium alloy
14	Slipper block	1	Chromium-plated steel
15	Sealing slip ring	1	Plastic
16	Driving slipper block	1	Plastic
17	Cover plate	1	Aluminium alloy
18	Cover plate gasket	1	Rubber
19	Muffler	1	Plastic
20	Seal seat	4	Rubber
21	Seal seat	4	PTFE
22	Clamping bar	4	Stainless steel, carbon steel
23	Connecting rod	1	Stainless steel
24	Compression spring	1	Copper
25	Driving shaft	1	Stainless steel
26	Seal ring of driving shaft	2	Rubber
27	Y-type O-ring	4	Rubber
28	O-ring	1	Rubber
29	Butterfly-type O-ring	1	Rubber
30	Inlet nozzle	1	Copper
31	Ball sealer	4	Rubber
32	Ball sealer	4	Stainless steel, ceramic, PTFE

MATTERS NEED ATTENTION

Malfunction forms	Causes	Troubleshooting
No water comes out from the pump or the flow is insufficient.	1、The air pressure is insufficient.2、The flow channel of the pump cavity is blocked3、The valve is not opened	1、Add the air pressure 2、Open the pump cavity for cleaning 3、Open the valve
The pump stops its operation	1、The air distribution valve is damaged2、The diaphragm is damaged3、The muffler is blocked4、Air leakage occurs in the conn-eciting rod seal	1、Repair or replace the air distribution valve2、Replace the diaphragm3、Clean the muffler.4、Replace the connecting rod seal
The lift is too low	1、The suction valve is damaged2、The flow is too high3、The air pressure is too low	1、Shotten the pipe and reduce elbows2、Turn down the drain valve.3、Add the air pressure
The noise is too low	1、The muffler is broken	1、Add the air pressure.

Made in China

VEVOR®

TOUGH TOOLS, HALF PRICE

www.vevor.com/support