DFPC-125 - Pneumatic actuator Festo - Free user manual and instructions

Product Type	Double-acting pneumatic cylinder
Bore Diameter	125 mm
Stroke Range	Up to 2000 mm (depending on variant)
Operating Pressure	0.6 to 12 bar
Temperature Range	-20 to +80 °C
Weight (approximate)	5 kg (basic variant)
Cushioning	Adjustable pneumatic cushioning at both ends
Piston Rod Thread	M36x2
Pneumatic Connection	G1/2
Medium	Compressed air as per ISO 8573-1:2010 [7:4:4]
Position Sensing	Proximity switch compatible (slot type)
Materials	Barrel: aluminum; Piston rod: stainless steel; Seals: NBR
Maintenance	Check seals and cushioning periodically; no additional lubrication required if using lubricated air
Safety	Ensure residual pressure released before maintenance; use appropriate accessories
Spare Parts	Contact Festo service for spare parts kits

Frequently Asked Questions - DFPC-125 Festo

What is the maximum operating pressure for the Festo DFPC-125?

The maximum operating pressure is 12 bar. Ensure your air supply is regulated to avoid damaging the cylinder.

How do I adjust the cushioning on the DFPC-125?

Use the adjusting screws at both end caps. Turn clockwise to reduce cushioning effect, counterclockwise to increase. Adjust while the cylinder is in motion.

What type of sensors can be used with this cylinder?

The cylinder has slots for proximity switches. Use Festo SME/SMT type sensors or compatible alternatives. Ensure correct slot orientation.

What is the weight of the DFPC-125?

The weight depends on the stroke length. For a standard 500 mm stroke, it is approximately 5 kg. Refer to the datasheet for exact weight.

Can the DFPC-125 be used in food industry applications?

Standard seals are NBR. For food applications, use optional seals with FDA compliance. Check the Festo catalog for appropriate variants.

What maintenance is required for the DFPC-125?

Periodically check for leaks, cushioning performance, and seal condition. No routine lubrication is needed if the compressed air is lubricated. Replace seals if damaged.

What is the temperature range for the cylinder?

The operating temperature range is -20 to +80 °C. For extreme temperatures, special seal materials are available.

How do I install the DFPC-125 cylinder?

Mount the cylinder securely using the threaded holes or flanges. Align the piston rod with the load to avoid side loads. Connect air lines to the ports (G1/2). Test for leaks before operation.

What is the stroke length of this model?

The stroke length varies based on the configuration. Standard strokes up to 2000 mm are available. Check the product label or order documentation for the exact stroke.

Where can I find spare parts for the DFPC-125?

Contact Festo customer service or an authorized distributor. Provide the cylinder serial number for correct spare part identification.

USER MANUAL DFPC-125 Festo

Operating instructions

8165883

2021-10b

[8165885]

8165883

Translation of the original instructions

© 2021 all rights reserved to Festo SE & Co. KG

1 Applicable Documents

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All available documents for the product → www.festo.com/sp.

2 Safety

2.1 Safety instructions

• Take into account the ambient conditions at the location of use.
  -Only use the product in its original condition without unauthorised modifications.
• Observe the identifications on the product.
• Before switching off the compressed air supply: secure the load on the piston rod.
  –Prior to assembly, installation and maintenance work: switch off the compressed air supply and secure it against being switched back on.
• Keep the travel path of the piston rod clear.

2.2 Intended use

The intended use of the product is to implement linear movements in a compressed air machine in an industrial environment.

2.3 Training of qualified personnel

Work on the product may only be carried out by qualified personnel who can evaluate the work and detect dangers. The qualified personnel have skills and experience in dealing with pneumatic (open-loop) control technology.

3 Additional information

Contact the regional Festo contact if you have technical problems

→ www.festo.com.

4 Product design

1 Pneumatic port 2
2 Cylinder barrel
3 Extended tie rod (only for DFPC-...-LB2)
4 Piston rod
5 Pneumatic port 1
6 Bearing cap
7 End cap

Fig. 1: Product design

5 Function

Pressurising and exhausting the cylinder chambers causes the piston rod connected to the piston to move back and forth.

Fig. 2: Function

6 Transport and storage

Store the product in a cool, dry environment protected from UV and corrosion. Keep storage times short.

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Do not use the tie rods as a transport aid.

7 Assembly

• Fasten the linear drive to one of the mounting interfaces.
  Potential mounting interfaces:
  -Mounting thread on the bearing cap
  -Extended tie rods (only for DFPC-...-LB2)

8 Pneumatic Installation

1. Remove the plugs at the pneumatic connections.
2. To set the travel speed, use one-way flow control valves.
3. Screw the fittings into the pneumatic connections 1 and 2.

9 Commissioning

Requirements

• The linear drive is fully mounted and connected.
  -The permissible impact energy at the end stop must not be exceeded 14 Technical data.
  –The piston rod or the piston rod bearing must not be subjected to transverse loads. The dead weight of the piston rod must be absorbed.
• Take the permissible buckling load into account
  → 14.1 Permissible buckling load.

Permissible impact energy at end stop

The permissible impact energy at the end stop is dependent on the impact velocity and the mass of the moving payload.

Impact velocity and mass of the moving payload

Permissible impact velocity		v_perm = 2 · E_permm_own + m_load
Permissible mass of the moving payload		m_load = 2 · E_permv^2 - m_own
E_perm	Max. impact energy
mIntrinsic	Moving mass (drive) 14 Technical data m Intrinsic = moving mass with 0 mm stroke + added moving mass per 10 mm stroke
mLoad	Permissible mass of the moving payload
v Operating velocity
V perm	Permissible impact velocity

Tab. 1: Impact velocity and mass of the moving payload

Commissioning the linear drive

1. Pressurise the product slowly. A soft start valve is used for the gradual startup pressurisation.
2. Screw the one-way flow control valves all the way in on both sides, then loosen by one turn.
3. Exhaust the cylinder on one side.
   The piston rod moves to an end position.
4. Start a test run.
5. During the test run, check the velocity of the moving mass and the end stop.

10 Operation

WARNING

Risk of injury due to unexpected movement of components.

Body parts in the movement range of the piston rod can be crushed or severed.

• Protect the positioning range from unwanted intervention.
• Keep foreign objects out of the positioning range.
• Observe the operating conditions.
• Observe the permissible limit values.

11 Maintenance

If used as intended, the product is maintenance-free.

12 Fault clearance

Fault description Cause Remedy
Piston rod does not move in the desired direction	Tubing lines reversed at the ports	Correct the tubing lines at the ports.
Uneven movement of the piston	Input pressure too low Keep tubing	lines short. Select suitable cross sections.
		Select correct pressure.
	Transverse loads are applied to the piston rod	Avoid transverse loads on the piston rod.
	Piston seal or piston rod seal faulty	Replace product.
Piston does not move to end position	Cylinder barrel damaged Replace	product.
	Piston rod damaged
	Foreign matter in the product Re	place product.
		Filter compressed air.

Tab. 2: Fault clearance

13 Disassembly

1. Secure the load to the piston rod.
2. Depressurise the product.
3. Disconnect the attachment from the piston rod.
4. Loosen the screws on the mounting interface.

14 Technical data

DFPC-... 80 100 125 160 200 250 320
Design Piston, piston rod, tie rod, cylinder barrel
Mode of operation Double-acting
Pneumatic Connection		G1/8			G1/4
Stroke [mm]		10 ... 1600
Cushioning		Elastic cushioning rings at both end positions
Type of mounting		DFPC-... (on flange in accordance with ISO 5210)DFPC-...LB2 (based on ISO 15552 with spacer bolts on the bearing cap)
Flange hole pattern ISO 5210		F07	F07	F10	F10	F10	F10/F14	F10/F14
Thread size Tie rod		M8	M8	M10	M12	M16	M20	M20
Thread length of tie rod [mm]DFPC-...-LB2		10 120^1)					10 140^1)
Mounting position		Any (transverse loads not permitted)
Position sensing		Suitable for proximity switches
Solenoid valve connec-tion		Via accessories VDI/VDE 3845 adapter plate
Max. impact energy at [J]the end positions		1.4 0.94	1.1	3.3 4.8 6.0	12.6
Operating and ambient conditions
Operating medium		Compressed air to ISO 8573-1:2010 [7:4:4]
Information on the oper-ating medium		lubricated operation possible, in which case lubricated operation will always be required
Operating pressure [MPa]		0.06 ... 0.8
		[bar]	0.6 ... 8
		[psi]	9 ... 116
Nominal operating pres-sure [MPa]		0.6
		[bar]	6
		[psi]	87
Ambient temperature [°C]		-20 ... +80
Vibration and shock resistance		Severity level 1 in accordance with IEC 60068^2)
Materials
Cylinder barrel		Wrought aluminium alloy, smooth anodised
Cover		Gravity die-cast aluminium					Aluminium
Tie rod High-alloy stainless steel
Piston rod		High-alloy stainless steel
Piston		Wrought aluminium alloy			Gravity die-cast aluminium
Wiper seal piston rod		TPE-U (PU)
Static seals		NBR
Forces and air consumption
Theoretical force at [N]6 bar, advance	3016	4712	7363	12064	18850	29452	48255
Theoretical force at [N]6 bar, return	2827	4524	7069	11581	18096	28698	47077
Theoretical air con-sumption at 6 bar per 10 mm, advance [l]	0.35	0.55	0.86	1.41	2.20	3.44	5.63
Theoretical air con-sumption at 6 bar per 10 mm, return [l]	0.33	0.53	0.83	1.35	2.11	3.35	5.49

1) Variable value: thread length from bearing surface of bearing cap
2) The vibration and shock resistance is applicable up to a maximum stroke length of 400 mm.
3) For moving masses, added weights and basic weights: tolerance ± 15%
Tab. 3: Technical data

Type of severity level (SL)

Vibration load
Frequency range [Hz]		Acceleration [m/s2]		Deflection [mm]
SL1	SL2	SL1	SG2	SL1	SL2
2 ... 8	2 ... 8	-	-	±3.5	±3.5
8 ... 27	8 ... 27	10	10	-	-
27 ... 58	27 ... 60	-	-	±0.15	±0.35
58 ... 160	60 ... 160	20	50	-	-
160 ... 200	160 ... 200	10	10	-	-
Shock load
Acceleration [m/s2]		Duration [ms]		Shocks per direction
SL1	SL2	SL1	SL2	SL1	SL2
±150	±300	11	11	5	5
Continuous shock load
Acceleration [m/s2]		Duration [ms]		Shocks per direction
±150		6		1000

Tab. 4: Type of severity level (SL)

14.1 Permissible buckling load

Fig. 3: Permissible buckling load

• F [N] = permissible buckling load
• l [mm] = stroke + piston rod extension E + piston rod thread extension L