Modular thermal expansion valve and cartridge therefor

Details Modular thermal expansion valve and cartridge therefor Modular thermal expansion valve and cartridge therefor

1998-05-20

2000-05-16

Tapolcai, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, F25B 4104

Patent

active

060624841

ABSTRACT:
An improved thermally responsive expansion valve for use in controlling flow of refrigerant in a circulating system has a cartridge sub-assembly with a fluid charged diaphragm capsule, an operating rod mechanism, a valve seat and captured valve obturator. A tubular extension with the valve seat is adjustably threaded onto the capsule. The cartridge subassembly may be thermally pre-calibrated before installation in a blind bore in a valve body. During calibration, the tubular extension is rotated to adjust the diaphragm and operating rod mechanism to provide the desired obturator movement from the valve seat at the calibration temperature.

REFERENCES:
patent: 4819443 (1989-04-01), Watanabe et al.
patent: 4979372 (1990-12-01), Tanaka
patent: 5127237 (1992-07-01), Sendo et al.
patent: 5257737 (1993-11-01), Vestergaard
patent: 5555739 (1996-09-01), Kujirai et al.
patent: 5931377 (1999-08-01), Kang et al.

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