Control is performed via a nozzle with a travel of over 14 mm on around 500 steps of the built-in motor:the correct balance between the theoretical and mechanical resolution guarantees significant stability in controlling the superheat value at the set point and a rapid response to transient situations.
The proportional control function also ensures the absence of pressure pulsation in the refrigerant lines and greater control over the return of liquid to the compressor/compressors.
The standard configuration of the E2V requires a pressure probe and a temperature probe to be installed at the evaporator outlet, so as to control the refrigerant superheat value. The Electronic Expansion Valve driver allows the user to select from different operation Modes such as: Super Heat Control, Back Pressure EPR, Hot Gas Bypass by Temp., Hot Gas Bypass by Pressure, Transcritical CO2, Superheat regulation with 2 temp probes, Control with Emerson Digital Scroll, Analogue Positioner (4..20mA, 0..10Vdc),
The E2V is available in different sizes up to cooling capacities of 50 kW, for air-conditioning applications, and up to 30 kW for refrigeration applications.
Versions can be selected with welded copper fittings (ODF) or brass connectors (SAE).The most suitable size can be easily chosen according to specific requirements by using the E2V SELECTION software, or alternatively by referring to the quick selection tables.
Carel Electronic Expansion Valves are suitable for R22, R134a, R404A, R407C,R410A, R744, R507A, R417A, R717