Tech Tid Bits > Y1037 Temperature Responsive Expansion Valve (TREV)

Y1037 Temperature Responsive Expansion Valve (TREV)
02 Jan 2009

The type Y1037 TREV was developed in response to the refrigeration industry’s move to R-22 as a refrigerant for medium and low temperature refrigeration.

Since R-22 refrigeration systems run higher compressor discharge temperatures than comparable R-12 and R-502 systems, a need has been required for an expansion valve which will prevent excessive discharge temperatures from occurring on these systems.

The Y1037 TREV solves this problem by modulating refrigerant flow in response to bulb temperature only.

Specifications and Operation

1. The Y1037 TREV uses the F body and a thermostatic element consisting of a sensing bulb and a bellows assembly similar to the direct acting ORI and CRO pressure regulating valves. The element is charged with a hydrostatic fluid which expands as its temperature increases.



2. The Y1037 TREV modulates the flow of refrigerant in response to bulb temperature only. The valve does not have an equalization connection and is not influenced by pressure.



3. The Y1037 TREV modulates the flow of refrigerant in response to bulb temperature only. The valve does not have an equalization connection and is not influenced by pressure.

   Installation and Service
   
   

   1. When brazing solder type connections, it is recommended that a wet rag, chill block, or some other means be used to prevent excessive heating of the valve body.
   
   
   
   2. Internal parts kits or replacement elements will not be available for the Y1037 TREV. The valve, however, may be dissassembled for inspection and cleaning when necessary.
   
   
   DO NOT REMOVE THE ELEMENT
   
   For capacity ratings and selection of valve and other pertinent information, please refer to Bulletin 10-10-2
   
   Thanks to Sporlan Valve Co. (Division of Parker Hannifin Corporation) for the information supplied.
   
   
   
   
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   Figure 1. Y1037 TREV.
   
   
   

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