Humphrey Product
Description
250A Series 1/4 pipe Air Pilot Valves feature the classic Humphrey diaphragm poppet principle. The unbalanced, air-spring return design assures reliable shifting and bubble-tight sealing actuated, and unactuated. Compact design permits close proximity mounting to work and fast cycling/quick exhaust. Rugged 2- or 3- way valves are available normally closed or normally open, in standard or optional brass body construction (for alternate media).
Specifications
Media: Air, Inert Gas
Valve Function: Single Pilot, Normally Open
Piping Type: Inline, Direct Piping
Port Size: 1/4 NPSF (Pilot Port: 1/8 NPSF)
Number of Ports: 3 ports
Number of Positions: 2 positions
Size (in) HxWxD: 2.78 x 1.63 DIA
Type of Operation: Air Piloted
Flow - SCFM @ 100 psig: 60
Flow - LPM @ 6.9 bar: 1699
ESEOD (orifice) - in (mm): 0.215 (5.45)
Flow Coefficient (Cv): 0.83
Lubrication: Not required
Pressure Range (psi): 10-125
At Valved Pressure of: <=30 PSI 60 PSI 90 PSI 120 PSI
Recommended Pilot Pressure (psi): 28 48 67 86
Operating Speed (cycles/min): 600
Ambient Temperature Range (°F): -20~225
Wetted Materials: Zinc diecast, Brass, SST, Buna N
Weight (oz): 8.0
*Please note that image representation may only represent a product series with particular items. The buyers responsibility is to ensure the product SKU matches their specifications before purchase.
Shipping
We can ship to virtually any address worldwide. Some products carry shipping restrictions, and certain items cannot be shipped to international destinations.
Unless otherwise noted, all shipments are FOB Shipping Point.
Shipping rates for many items are weight-based. Item weights are rounded up to the next full pound, consistent with our carriers' policies.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We will also cover return shipping costs if the return is the result of our error — for example, if you received an incorrect or defective item.
Refunds are typically issued within four weeks of the date you give your package to the return shipper. This period covers:
● Transit time for the returned item to reach us (5–10 business days)
● Processing time once we receive your return (3–5 business days)
● Time for your bank to process the refund (5–10 business days)
If you need to return an item, please contact us with your order number and details about the product you would like to return. We will respond promptly with instructions for returning the item.
All returns require prior approval and a Return Merchandise Authorization (RMA) number issued by Flow Dynamics & Automation, Inc.. Returns made outside the 30-day window described above, or that are not the result of our error, must be new and unopened and are subject to a 25% restocking fee.
