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Festo
8157634
One-way flow control valve VFOE-LE-T-R38-Q8-F1A
This Festo industrial component, part number 8157634, features an exhaust air flow control non-return function with a QS-8 pneumatic connection 1 and an R3/8 pneumatic connection 2. Actuated manually via a rotary knob with a latch, the unit has a PBT housing, a 21 mm width across flats, and supports screw-in mounting in any position. It delivers a standard nominal flow rate of 720 l/min in the flow control direction and 600 l/min to 900 l/min in the non-return direction across an operating pressure range of 0.02 MPa to 1 MPa. The component is rated for ATEX Zone 1, 2, 21, and 22 environments, operates within an ambient temperature range of -10 °C to 60 °C, and excludes specific copper, zinc, or nickel metals from use. Submit the exact part number, quantity, and application requirements to receive a formal quotation.
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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
- 8157634
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 8157634.
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Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Valve function
- Exhaust air ow control non-return function
- Pneumatic connection 1
- QS-8
- Pneumatic connection 2
- R3/8
- Actuation type
- Manual
- Adjusting element
- Rotary knob with latch
- Type of mounting
- Screw-in
- Standard nominal ow rate in ow control direction
- 720 l/min
- Standard nominal ow rate in non-return direction
- 600 l/min...900 l/min
- Ambient temperature
- -10 °C...60 °C
- Housing material
- PBT
- Explosion prevention and protection
- Observe the information on the certicate | Zone 1 (ATEX) | Zone 2 (ATEX) | Zone 21 (ATEX) | Zone 22 (ATEX)
- Mounting position
- Any
- Width across ats
- 21 mm
- Rotatability
- 360 deg/continuous swiveling not permissible
- Variants
- Metals with copper, zinc or nickel by mass as main constituent are | excluded from use. Exceptions are nickel in steel, chemically nickel- | plated surfaces, printed circuit boards, cables, electrical plug connectors | and coils.
- Operating pressure for entire temperature range
- 0.02 MPa...1 MPa | 0.2 bar...10 bar | 2.9 psi...145 psi
- Standard ow rate in ow control direction 6 -> 0 bar
- 1150 l/min
- Standard ow rate in non-return direction at 6 -> 0 bar
- 1300 l/min...1500 l/min
- Operating medium
- Compressed air as per ISO 8573-1:2010 [7:4:4]
- Information on operating and pilot media
- Operation with oil lubrication possible (required for further use)
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 8157634. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.