Expansion Valves
Expansion Valves are devices used to control the refrigerant flow in a refrigeration system. They help to facilitate the change of higher pressure of liquid refrigerant in the condensing unit to lower pressure gas refrigerant in the evaporator.
In direct expansion circuits the two main types are thermostatic expansion valves and Electronic Expansion Valves. The thermostatic functionality of both internal equalization and external equalization is described with reference to diagrams. Electronic types are divided into categories of pulse width modulated and continuous modulation. Further types that use a fixed orifice are found in small systems and are either capillary tubes or restrictors. The flow of liquid into a flooded evaporator can be controlled by a float valve. This may be a high- or low-pressure type. Low-pressure types are use in low-pressure receiver circuits. Other level controllers are briefly covered.
The term “low side” is used to indicate the part of the system that operates under low pressure, in this case the evaporator. The “high side” is used to indicate the part of the system that operates under high pressure, in this case the condenser.
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Valves
VAL12001 Expansion Valve
Trane VAL12001 Valve; Expansion
The SEHI are Electronically Operated Step Motor flow control valves, intended for the precise control of liquid refrigerant flow. Synchronized signals to the motor provide discrete angular movement, which translate into precise linear positioning of the valve piston.
(0 reviews)$1,850.00 Add to cart -
Valves
VAL1065E Expansion Valve
Trane VAL1065E Valve; Electronic Expansion Valve
The SEHI 175 Expansion Valves are Electronically Operated Step Motor flow control valves, intended for the precise control of liquid refrigerant flow.
(0 reviews)$2,200.00 Add to cart -
Valves
VAL05959 Expansion Valve
Trane VAL05959 Expansion Valve (X05409 GT-5773)
Alco Control Take-apart Thermo™ – Expansion Valves are designed for air conditioning, chillers, rooftops, close control units.
(0 reviews)$780.00 Add to cart -
Valves
VAL11996 Expansion Valve
Trane VAL11996 Expansion Valve (X15111285160)
The SER(I) series valves are step motor electric expansion valves. Step motors provide discrete segments of angular motion, or rotation, in response to an electronically generated signal. The advantages of step motors in valve applications are high resolution, repeatability and reliability with low hysteresis. Feedback loops not required, simplifying controller design and circuitry.
(0 reviews)$1,230.00 Add to cart