250B31021VAI : Humphrey Roller Ball Operated Valves (250B 3 10 21 VAI)
250B Series 1/4 pipe Roller Ball type mechanical valve features the classic Humphrey diaphragm poppet principle. The unbalanced, air-spring return design assures bubble-tight sealing actuated, and unactuated. Rugged 2 or 3-way valves are available normally closed or normally open. Standard or optional brass body suitable for inline or base mounting.
| Number of Ports | 3 ports | ||||
| Number of Positions | 2 positions | ||||
| Valve Function | Normally closed | ||||
| Piping Type | Inline, Direct piping | ||||
| Options Included | Mounting base | ||||
| Approx Size (in) HxWxD | 2.38 x 1.56 DIA | ||||
| Media | Air, Inert Gas | ||||
| Type of Operation | Roller Ball | ||||
| Flow Capacity (Cv) | 0.83 | ||||
| Port Size | 1/4 NPSF | ||||
| Lubrication | Not required | ||||
| Media Filtration | Not required | ||||
| Pressure Range (psi) | 0-125 | ||||
| At Valved Pressure of: Force to Actuate (lbs): |
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| Ambient Temperature Range (⁰F) | 0~400 | ||||
| Wetted Materials | Zinc diecast, Brass, FKM | ||||
| Weight (oz) | 9.0 |