Electronic expansion valve

EEVs control the flow of refrigerant entering a direct expansion evaporator. They do this in response to signals sent to them by an electronic controller. A small motor is used to open and close the valve port. The motor is called a step or stepper motor. They are much more sophisticated and allow the refrigeration system to operate much more accurately and efficiently.

You’ll usually see electronic expansion valves listed with the acronym of either EEV or EXV.

The Danfoss series of electric expansion valves called ETS, can offer you efficient and reliable operation, covering any air conditioning system requirements. Electronic Expansion Valve. The valve supports automatic adjustment of refrigerant flow rate and makes the system work under optimized conditions for the purpose of fast cooling or heating, precise temperature control and energy saving. Parker-Sporlan’s SER(I) valves are stepper motor actuated electric expansion valves intended for use in direct expansion refrigeration and air conditioning applications.

The SER valve is suited for a wide range of applications due to its compatibility with HCFC, HFC, HFO and HC refrigerants and Mineral, Alkylbenzene and Polyolester Oils. Low superheat, higher evaporating pressure, and better COP The advantages of an electronic superheat controller are obvious. The evaporator is always optimally filled with refrigerant.

Sporlan electric valves are designed for compatibility with all current halocarbon refrigerants (HCFCs and HFCs including R-410A), in addition to subcritical CO 2. System conditions will dictate which product is necessary to control the application.

Specific details can be reviewed with your Sporlan Sales Engineer. Featuring high resolution actuator assemblies, these valves provide unmatched control capability across a wide range of applications and loads. The electronic expansion valve with electronic control, the stepper motor. When sleeve attached to the shaft moves up, it provides more accounting slots. It increases the flow of the refrigerant in the evaporator.

When he moves down, it covers slots, thus reducing the flow and cooling capacity. ELECTRONIC EXPANSION VALVE : Depending on the refrigerant and the measured overheating, the controller calculates the opening and closing of the expansion valve. See previous images) Depending on the evaporator loa the difference between the stable overheating and the actual overheating is regular.

ETS is a series of electric expansion valves for precise liquid injection in evaporators for air conditioning and refrigeration applications. The valve piston and linear positioning design is fully balance providing bi-flow feature as well as solenoid tight shut-off function in both flow directions. And with nine valves that cover a capacity range of 4Tons, valve selection and SKU reduction are simplified. The EXD-Uis a universal driver that enables the operation of Emerson stepper motor driven valves used in applications such as solenoid valves , electronic expansion valves , hot gas bypass or evaporator pressure regulator as capacity control, crankcase pressure regulator, heat reclaim regulator, and liquid level control. Moreover, these also have statistical advantages again of several percent as the electronic system guarantees optimum calibration at all times, unlike mechanical devices that needs to be adjusted manually and periodically.

The valve controls the automatic adjustment of refrigerant flow rate and makes the system work under optimized conditions for the purpose of fast cooling or heating, precise temperature control and energy saving. In addition, flash gas in the liquid line is less damaging to the operation of the system because the relatively large port and large stroke of the EXV allows them to open wide, purge the flash gas, and then re-establish the desired superheat. It is in the transitional regimes (temperature changing) within blast-chilling or deep-freezing that the efficiency of the refrigeration process becomes interesting. Compressor drives that do not provide KW feedback can use the RLA parameter as a rough equivalent.

The refrigerant gas itself is harmless, but it may generate toxic gases if it comes into contact with flames.

Do not repair the electrical components with wet hands. Working on the equipment with wet hands may cause an electrical shock.