Electronic Expansion Valves and Drivers

By Anonymous -
Technology
The ExV family valves manage refrigerant expansion through a variable valve port, created by a fixed calibrated opening and a canonical movable element.
The linear movement of the closing element is achieved trough the combined action of a stepper motor and a worm screw transmission, which produces precise and regular movement by minimising friction.
Control precision and stability are ensured by rotating elements supported by stainless steel ball bearings. The entire mechanism is very robust, thanks to the motor block suspended on harmonic steel springs, and a technopolymer chassis that guarantees high mechanical performance and light weight.
All this is made possible my careful construction, the use of quality materials, and a production process with final testing on each and every product, in accordance with the highest quality standards.

Performance
The care paid to the design and  production of our valves ensure market-leading performance:
  • high maximum operating pressure (Ps)
  • extended operating temperature range
  • operation guaranteed in both directions so as to simplify refrigerant circuit layout non reverse-cycle heat pumps and reduce installation costs: just the one valve is required, without needing to install non-return valves.
In addition, thanks to the effect combined of:
  • Teflon gasket for perfect tightness;
  • calibrated spring and extra closing steps to ensure tightness seal even with high pressure differentials;
  • ultracap to guarantee closing even in the event of blackouts.
ExV sistema is the only solution available on the market that can fully carry out the function of solenoid valve.

Energy saving and precision
The extended range of operation and precision in terms of control (from 10 to 100% of rated capacity) allows significant energy savings.

The extended control range of the ExV allows refrigeration unit operation with floating condensing pressure, significantly increasing compressor COP at medium and low room temperatures. This special function- only available with electronic expansion valves- brings considerable energy savings in all refrigeration applications.
ExV sistema provides excellent control performance, with a typical control curve that ensures, high control precision in all applications, even at low flow-rates. This feature is very useful in circuits featuring compressors managed by inverters, and in general on circuits with variable flow-rates.

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