Confirm the exact configuration
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
186451
Pressure regulator LR-1/4-D-MIDI
The Festo 186451 is a Midi-sized D-series directly controlled diaphragm regulator featuring a rotary knob with detent for actuator locking and primary pressure compensation. It delivers a normal nominal flow rate of 2100 l/min across an operating pressure of 0 bar to 16 bar and a pressure regulation range of 0.5 bar to 12 bar with secondary exhausting. The unit includes a pressure gauge, operates with compressed air or inert gases within a temperature range of -10 °C to 60 °C, and weighs 720 g with front panel mounting, in-line installation, or accessory mounting capabilities. Submit the exact part number, quantity, and application requirements to receive a quote.
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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
- 186451
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 186451.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Size
- Midi
- Series
- D
- Actuator lock
- Rotary knob with detent
- Mounting position
- Any
- Structural design
- Directly controlled diaphragm regulator
- Controller function
- Constant output pressure | With primary pressure compensation | With secondary exhausting
- Pressure gauge
- with pressure gauge
- Operating pressure
- 0 MPa...1.6 MPa | 0 bar...16 bar
- Pressure regulation range
- 0.5 bar...12 bar
- Max. pressure hysteresis
- 0.02 MPa | 0.2 bar | 2.9 psi
- Normal nominal ow rate (normalized to DIN 1343)
- 2100 l/min
- Operating medium
- Compressed air as per ISO 8573-1:2010 [7:4:4] | Inert gases
- Information on operating and pilot media
- Operation with oil lubrication possible (required for further use)
- Corrosion resistance class (CRC)
- 2 - Moderate corrosion stress
- LABS (PWIS) conformity
- VDMA24364-B1/B2-L
- Air quality class at the output
- Compressed air as per ISO 8573-1:2010 [7:4:4] | Inert gases
- Temperature of medium
- -10 °C...60 °C
- Ambient temperature
- -10 °C...60 °C
- Product weight
- 720 g
- Type of mounting
- Front panel mounting | In-line installation | With accessories
- Pneumatic connection 1
- G1/4
- Pneumatic connection 2
- G1/4
- Note on materials
- RoHS compliant
- Material of sub-base
- Die-cast zinc
- Seals material
- NBR
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 186451. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.