Automatic temperature and humidity regulation – Thermostatic – With pressure control
Patent
1984-12-26
1986-06-24
Tapolcai, William E.
Automatic temperature and humidity regulation
Thermostatic
With pressure control
236102, 251 614, 2513353, 251 612, G05D 2700
Patent
active
045963606
ABSTRACT:
To eliminate the effect of variables such as pressure and temperature on the operation of a pilot operated, pressure regulating valve, a poppet (30) is disposed between two ports (20), (34) in a valve body (14) and is biased towards a seat (26) by a pair of bellows (50), (58) which in turn are selectively compressed by an elongated rod (68). The bellows (50), (58) are disposed in opposing relation and have their interiors vented to eliminate the effect of ambient pressure while the body (14) and the rod (68) are made of materials having differing coefficients of thermal expansion to provide for temperature compensation.
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Sunstrand Corporation
Tapolcai William E.
LandOfFree
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