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Balanced Valve

IP.com Disclosure Number: IPCOM000098642D
Original Publication Date: 1959-Aug-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Durbeck, RC: AUTHOR [+2]

Abstract

In a device which requires the selective application of either a higher or lower than atmospheric pressure to a vent, a solenoid operated valve is used for selection purposes. Former valves have utilized the solenoid to move the valve in one direction and used the difference in pressure, present when the solenoid is deenergized, to move the valve in the other direction.

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Balanced Valve

In a device which requires the selective application of either a higher or lower than atmospheric pressure to a vent, a solenoid operated valve is used for selection purposes. Former valves have utilized the solenoid to move the valve in one direction and used the difference in pressure, present when the solenoid is deenergized, to move the valve in the other direction.

The drawings illustrate valves which operate faster and with smaller solenoids because of the utilization of structure which balances the pressures on the valves.

The upper drawing shows a fully balanced valve supported by two end diaphragms. The sum of atmospheric pressures acting at the outside of the two end diaphragms is zero in the axial direction of the stem.

The sum of the high pressures acting on the poppet and the inside of the end diaphragm is zero in the axial direction. Similarly, the sum of the low pressures produces no axial component. A bi-directional solenoid is used to move the balanced valve.

The lower drawing shows a valve, in which the atmospheric pressure acts on an end diaphragm to partially balance the high pressure in the axial direction. While this version is not as fast acting as the valve shown in the upper drawing, it uses a uni-directional solenoid which is less expensive than a bi-directional solenoid.

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