Humphrey 250A-3-10-20 Diaphragm Poppet Air Piloted Valves
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).
| Media | Air, Inert Gas |
| Valve Function | Single Pilot, Normally Closed |
| 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 | 1.97 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) | 0-125 |
| At Valved Pressure of: Recommended Pilot Pressure (psi): | <=30 PSI60 PSI90 PSI120 PSI22467195 |
| Operating Speed (cycles/min) | 600 |
| Ambient Temperature Range (⁰F) | -20~225 |
| Wetted Materials | Zinc diecast, Brass, SST, Buna N |
| Weight (oz) | 8.0 |