Product Details
250-4AA Series, 1/4 pipe 4-Way Air Pilot Valve features the classic Humphrey diaphragm-poppet principle, while incorporating an internal compensating orifice to achieve faster response times, or a "momentary signal, maintained position" function. The unbalanced, air-spring return design assures reliable shifting and bubble-tight sealing actuated, or unactuated. Compact design permits close proximity mounting to work. Excellent choice to operate up to 4 inch bore, double acting pneumatic cylinders.
| Media | Air, Inert Gas |
| Valve Function | 4-way, Single Air Pilot, Spring Return |
| Piping Type | Inline, Direct Piping |
| Port Size | 1/4 NPSF (Pilot Port: 1/8 NPSF) |
| Number of Ports | 4 ports |
| Number of Positions | 2 positions |
| Size (in) HxWxD | 2.88 x 3.5 x 2.31 |
| Options Included | Internal compensating orifice, Mtg base |
| Type of Operation | Air Piloted, w/Bleed |
| 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:
Recommended Pilot Pressure (psi): | | <=30 PSI | 60 PSI | 90 PSI | 120 PSI | | 28 | 44 | 58 | 73 |
|
| Operating Speed (cycles/min) | 600 |
| Ambient Temperature Range (⁰F) | 0~225 |
| Wetted Materials | Zinc diecast, Brass, SST, Buna N |
| Weight (oz) | 38.0 |
