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Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
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Festo
153521
Differential pressure regulator LRL-1/2-QS-12
The Festo 153521 is a directly controlled piston regulator providing constant differential pressure with a return flow characteristic and continuous compressed air supply. Featuring an R1/2 pneumatic connection 1, a QS-12 pneumatic connection 2, a screw-in mounting type, and a PBT-reinforced housing with a nickel-plated brass screwed plug, this 110 g component operates within an inlet pressure range of 0 bar to 9 bar and a pressure regulation range of 2 bar to 6 bar. It achieves a nominal flow rate of 760 l/min open and 730 l/min closed while functioning with compressed air conforming to ISO 8573-1:2010 [7:-:-] at ambient temperatures between 0 °C and 60 °C. Submit the exact part number, quantity, and application requirements to receive a quote.
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Request a QuoteWhy no listed price?
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.
- Manufacturer
- Festo
- Part number
- 153521
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 153521.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Controller function
- Constant differential pressure | With return ow characteristic
- Pneumatic connection 1
- R1/2
- Pneumatic connection 2
- QS-12
- Type of mounting
- Screw-in
- Nominal ow rate, open
- 760 l/min
- Pressure regulation range
- 2 bar...6 bar
- Inlet pressure 1 MPa
- 0 MPa...0.9 MPa
- Inlet pressure 1
- 0 bar...9 bar
- Inlet pressure 1 psi
- 0 psi...130.5 psi
- Ambient temperature
- 0 °C...60 °C
- Housing material
- PBT-reinforced
- Operating medium
- Compressed air as per ISO 8573-1:2010 [7:-:-]
- Actuator lock
- Counter-locking
- Mounting position
- Any
- Structural design
- Directly controlled piston regulator | with continuous compressed air supply
- Nominal ow rate, closed
- 730 l/min
- Information on operating and pilot media
- Operation with oil lubrication possible (required for further use)
- LABS (PWIS) conformity
- VDMA24364-B1/B2-L
- Product weight
- 110 g
- Material of screwed plug
- Brass, nickel-plated
- Note on materials
- RoHS compliant
- Material of threaded seal
- PTFE
Engineering context
Identification and RFQ Guidance
What to include in your RFQ
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Technical verification
Our sourcing response is prepared against Festo 153521. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.