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).
| Number of Ports | 2 ports | ||||||||
| Number of Positions | 2 positions | ||||||||
| Valve Function | Single Pilot, Normally Closed | ||||||||
| Piping Type | Inline, Direct Piping | ||||||||
| Size (in) HxWxD | 1.97 x 1.63 DIA | ||||||||
| Options Included | Mounting base | ||||||||
| Media | Air, Inert Gas | ||||||||
| Type of Operation | Air Piloted | ||||||||
| Flow Capacity (Cv) | 0.83 | ||||||||
| Port Size | 1/4 NPSF (Pilot Port: 1/8 NPSF) | ||||||||
| Lubrication | Not required | ||||||||
| Pressure Range (psi) | 0-125 | ||||||||
| At Valved Pressure of: Recommended Pilot Pressure (psi): |
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| Operating Speed (cycles/min) | 600 | ||||||||
| Ambient Temperature Range (⁰F) | -20~225 | ||||||||
| Wetted Materials | Zinc diecast, Brass, SST, Buna N | ||||||||
| Weight (oz) | 8.0 |
ID #: 166330
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Video Transcript
A two-way valve is the simplest of all valves. You can have a two-way valve in pretty much any pneumatic system. They're the most simple. In our example, we're going to simply take a two-way push button valve. Two-way just means there is only two things that can be happening. It's either on or it's off.
And the push button, well, that's just the way we're going to make that happen. We could have a, a lever, we could have electricity, we could have any sorts of ways to make it happen. But all we're doing with the push button is simply actuating, making the valve change from one state to the other, and it's a two-way valve.
So the only two states, state number one is off, means the air is going to the valve, but it's not going through the valve. state two as I come along and I push the button, sit on the button, kick the button, whatever, and now the air is going through the valve and downstream to wherever we've got our tubing going to.
It could be going to a balloon, it could be going to all sorts of other things, but that's all the two-way valve is. It's either on or it is off.
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