×
The Humphrey 250A-3-11-20 is a 3-way, 2-position, air-piloted diaphragm poppet valve designed for reliable performance in pneumatic systems. This normally open valve is part of Humphrey's 250A Series, known for its compact design and efficient operation.
- Diaphragm poppet design: Ensures a bubble-tight seal in both states.
- Air-spring return: Allows reliable shifting without external springs.
- Compact construction: Enables close mounting and fast cycling.
- Versatile media compatibility: Works with air and inert gases.
- Maintenance-free operation: Long service life without lubrication needed.
| Valve Function | Single Pilot, Normally Open |
| Operation Type | Air Piloted |
| Number of Ports | 3 |
| Number of Positions | 2 |
| Port Size | 1/4 NPSF (Pilot Port: 1/8 NPSF) |
| Orifice Size | 0.215 in (5.45 mm) |
| Flow Capacity | 60 SCFM @ 100 psig (Cv = 0.83) |
| Pressure Range | 10 to 125 psi |
| Recommended Pilot Pressure | 28 psi @ 30 psi valve pressure, up to 86 psi @ 120 psi valve pressure |
| Operating Speed | Up to 600 cycles per minute |
| Ambient Temperature Range | -20F to 225F (-29C to 107C) |
| Media Compatibility | Air, Inert Gas |
| Lubrication | Not Required |
| Wetted Materials | Zinc Diecast, Brass, Stainless Steel, Buna N |
| Dimensions (HxW) | 2.78 in x 1.63 in diameter |
| Weight | 8.0 oz |