QBY4-50L - Air pump Vevor - Free user manual and instructions

Product Type	Pneumatic double diaphragm pump
Model	QBY4-50L
Brand	Vevor
Operating principle	Pneumatic double diaphragm, no rotating parts
Inlet/Outlet	50 mm (flange)
Max suction height	7 m
Max discharge height	50 m
Max outlet pressure	> 6 kgf/cm²
Max particle diameter	10 mm
Max fluid viscosity	10,000 cP
Compressed air pressure	2 to 8 kgf/cm²
Materials in contact with fluid	Stainless steel, aluminum alloy, cast iron, engineering plastic
Diaphragm materials	NBR, Viton, Neoprene, PTFE
Power supply	Compressed air (no electricity)
Self-priming	Yes, up to 7 m
Main applications	Transfer of corrosive, viscous, flammable liquids, sludges, foodstuffs (chocolate, syrup), paint, glue, etc.
Maintenance	Clean the interior cavity and copper bushing when replacing the diaphragm
Safety	Spark-free, usable in explosive atmospheres
Spare parts	Diaphragms, valves, seals available from the manufacturer
Repairability	Simple structure, easy replacement of diaphragms and valves

Frequently Asked Questions - QBY4-50L Vevor

How to install the QBY4-50L?

Install the pump on a stable surface. If vibrations are low, foundation bolts are not necessary. Connect the compressed air inlet with a filter and regulator (pneumatic triplex recommended). Ensure that the suction and discharge pipes are properly connected.

What type of fluid can be pumped?

This pump can handle corrosive, viscous, flammable, explosive, toxic liquids, as well as sludges, purees, pigments, glues, strong acids and alkalis. It is also suitable for food products like chocolate, syrup or sausages.

How to adjust flow and pressure?

The flow and outlet pressure are adjusted by adjusting the inlet compressed air valve. The air pressure must be between 2 and 8 kgf/cm². Higher pressure increases flow and discharge pressure.

What to do if the pump does not start?

Check that compressed air is connected and pressure is sufficient (min 2 kgf/cm²). Ensure that the valves (ball valves) are not obstructed. If the air is dirty, install a filter. Also check that the pump is not seized by dried residues.

How to maintain the pump?

Before each use, check for leaks. After use with liquids that may freeze or deposit, empty the pump by running it dry for a few minutes. Regularly clean the interior cavity and copper bushing when replacing the diaphragms.

When to replace the diaphragms?

Replace the diaphragms if you notice a drop in performance, leaks or visible damage. The diaphragm is a wear part. Follow the instructions in the manual for disassembly and reassembly.

Can the pump be used in explosive atmospheres?

Yes, because the pump operates on compressed air and does not produce sparks. It is therefore safe for use in flammable or explosive environments.

How to drain the pump before prolonged shutdown?

Close the suction valve, then run the pump empty for a few minutes to evacuate remaining fluid. Then clean the inside of the pump to avoid any deposit or corrosion.

Where to find spare parts?

Spare parts (diaphragms, valves, seals) are available on the official Vevor website: www.vevor.com/support. Use model numbers QBK-40L, QBY4-50L, etc., to order.

What is the warranty of this device?

Vevor provides an electronic warranty certificate. To activate the warranty, go to the technical support website: www.vevor.com/support and follow the instructions.

USER MANUAL QBY4-50L Vevor

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 the 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 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:

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.

Warning - To reduce the risk of injury, user must read instructions manual carefully.

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 WILDEN PUMPS and American MARIO-W PUMPS. The components in contact with flow are made of stainless steel, aluminium alloy, cast iron and engineering 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, pigments, glue, and adhesives, 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 muddy 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-step 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. It is unnecessary to pour priming water; the suction lift reaches 7 meters, the delivery lift reaches 50 meters, and the outlet pressure is >6 kgf/cm².
2. Wide flow and good performance. The diameter of particles allowed to pass reaches 10 mm. The damage to the pump is very minimal when handling slurry and impurities.
3. The delivery life and flow can be adjusted steplessly by opening the pneumatic valve (the pneumatic pressure adjustment is between 2-8 kgf/cm²).
4. This pump has no rotating parts and no bearing seals. The diaphragm completely separates the exhausted medium from the pump's running parts and working medium. The conveyed medium cannot leak outside. Thus, it will not cause environmental pollution or endanger human safety while exhausting 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 by this. Once overloaded, the pump will automatically stop and possess self-protection function. When the load recovers normally, it can also start automatically.

8. Simple structure and few 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. The performance will drop down gradually because of the damages of rotor, gear, and vane, etc.

1. It can transmit adhesive (viscosity below 10000 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

Each diaphragm is installed in both aligned working cavities (A) and (B), which can be connected together with a central coupling lever. The compressed air enters the air distribution valve from the air inlet of the pump, then 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 end, 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 that both 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 to the right. The suction force in chamber (A) lets the medium flow in from inlet (C), pushing the ball valve (2) to open and enter chamber (A), while ball valve (4) is closed 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 from inlet (C) and discharged from outlet (D).

CONNECTION SCHEMATIC DIAGRAM

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)	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	(PP) Impacts and exports are facing the edge
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	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	4-Φ13.5	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: QBY-10 and 15 cast iron/aluminum/stainless steel/plastic material import and export are threaded connections, not flanged. QBY-25 and 40 stainless steel/plastic material import and export are threaded connections, not flanged, while cast iron/aluminum alloy import and export are flanged, and threaded connections are dual-use. QBY-50/65/80/100 are flanged, no threaded. (Please refer to the actual sample 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 NEED ATTENTION

1. If the pump vibration is very slight, there is generally no need to install foundation bolts. 2. If the compressed air is mixed with dirty things, normal starting of the pump will be influenced. It is suggested that users should additionally install the pneumatic triplex parts.
2. When pumping media that will easily freeze or deposit, please install a valve at the inlet of the pump. If the pump is to be stopped, please firstly close the valve, and then run the pump for several minutes to empty the media inside the pump and clean accumulated liquid inside the pump in time, so as to avoid any difficulties in starting the pump next time.
3. When replacing the diaphragm, please clean the connecting rod, the inner cavity, and the copper bush of the pump. And avoid damaging the white PTFE seal ring. Make the reassembly as original, 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 tools with 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 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 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(pms)(kgf/cm2)	MWP(pSI)	Air InletSIZE
	OBR-40L	44	69	6.9	5	4.5	115
OBRY4-50L	75	75	8.0	7	8.0	8	113
OBRY4-25L	22	73	8.0	7	4.0	8	100
OBRY4-25LF46	24	70	8.0	7	4.0	8	100
OBRY-15PP	2.5	50	6.0	5	1.0	7	80
OBRK-15P	3	60	6.9	5	1.0	7	90
OBRK-15	3	60	6.9	5	1.0	7	90

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	(PP) Impacts and exports are facing the edge
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	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	4-Φ13.5	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 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 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

MODELL: 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	(PP) Impacts and exports are facing the edge
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	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	4-Φ13.5	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 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

QBY-50~100 Structural drawing
01. Admi! Ion piece	02. Air distribution valve
03. Air distribution valve	04.Ball sealor
05. Seal seal	06. Diaphragm vane
07. Connecting components	08. Copper roads
09. Intermediate	10. Inlt 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	(PP) Impacts and exports are facing the edge
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	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	4-Φ13.5	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 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 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.

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 will actually save you half compared to the top major brands. Please verify carefully when placing an order with us.

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 provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only represent 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 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(pms)(kgf/cm2)	MWP(pSI)	Air InletSIZE
	OBR-40L	44	69	6.9	5	4.5	115
OBRY4-50L	75	75	8.0	7	8.0	8	113
OBRY4-25L	22	73	8.0	7	4.0	8	100
OBRY4-25LF46	24	70	8.0	7	4.0	8	100
OBRY-15PP	2.5	50	6.0	5	1.0	7	80
OBRK-15P	3	60	6.9	5	1.0	7	90
OBRK-15	3	60	6.9	5	1.0	7	90

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	(PP) Impacts and exports are facing the edge
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	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	4-Φ13.5	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 tools with 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 to ensure 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(pms)(kgf/cm2)	MWP(pSI)	Air InletSIZE
	OBR-40L	44	69	6.9	5	4.5	115
OBRY4-50L	75	75	8.0	7	8.0	8	113
OBRY4-25L	22	73	8.0	7	4.0	8	100
OBRY4-25LF46	24	70	8.0	7	4.0	8	100
OBRY-15PP	2.5	50	6.0	5	1.0	7	80
OBRK-15P	3	60	6.9	5	1.0	7	90
OBRK-15	3	60	6.9	5	1.0	7	90

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	(PP) Impacts and exports are facing the edge
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	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	4-Φ13.5	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