Modular thermal expansion valve and cartridge therefor

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

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/68 (2006.01) F16K 31/00 (2006.01) F25B 41/06 (2006.01)

Patent

CA 2271532

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.

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