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Hardware Knowledge Hall: Shuttle valve introduction and its principle
Shuttle valve is a straight stroke valve, valve and actuator are combined into one valve. The advantages of small size, easy installation All shuttle valve principle of work is about the same. Shuttle valve example: Italy OMALVIP shuttle valve: When the "A" hole into the air ("B" hole exhaust), the piston moves to the "D" port and pressed on the seat seal, then the valve closed single-action Closed spring installed in the "A" side of the chamber. In non-controlled, the piston is pressed on the valve seat, so the most commonly used is the closed position. Switch process: compressed air from a hole in two holes into the piston axis to move, changing the original state of the valve on or off, normally closed, closed by spring force, normally open, open by spring force, on or off Less than a second of time. Open the valve: When the "B" hole into the air ("A" hole exhaust), the piston shaft from the valve seat to the "C" mouth direction and stop at the end of the stroke, when the valve is open. A single-acting, normally-open spring is mounted in the "B" chamber. When not in control, the piston shaft is away from the seat, so the most common is the open position. Typical applications: gas technology, oxygen, nitrogen machine, vacuum applications, sanitary ware industry, refrigeration. Shuttle valve has two IN, one outlet OUT. When an input in the import, exports have output. If the two import pressure range, the high-pressure import and export connectivity. If the two import pressure is equivalent, then the first import pressure and export port connected. Shuttle valve is equivalent to two one-way valve combination of the valve, its role is equivalent to "or". Shuttle valve has two intake ports P1 and P2, an exit A, which P1 and P2 can communicate with the A port, but P1 and P2 are not connected. Any one of P1 and P2 has a signal input, and A has output. If P1 and P2 have signal input, the first side of the signal pressure or high side of the gas signal through the A output, the other side is blocked, only when no signal input P1 and P2, A no signal output. Shuttle valve in the pneumatic system is widely used, it can order control signals input to the implementation of components, common manual and automatic control of the parallel circuit shuttle valve is used. Series: Chen Shasha This article Keywords: valve