SOLENOID EXPANSION VALVE PWM SERIES 2028

Product catalog summary

Overview: The Solenoid Expansion Valve PWM Series 2028 is designed to regulate the flow of refrigerant liquid to the evaporator by modulating the shutter's opening time. This allows for a wide range of power variations and improves system efficiency. It is compatible with HFC, HCFC refrigerants, and carbon dioxide (R744).

Specifications: The valve features seven interchangeable orifices with nominal flow rates from 1 kW to 18 kW. It must be paired with an HM4 coil and controlled by a microprocessor or driver. The valve operates with a minimum working time of 1 second and can handle temperatures from -40°C to 100°C.

Operating Principles: The PWM (Pulse Width Modulating) principle is used to optimize refrigerant injection, improve superheating control, and reduce the risk of liquid backflow to the compressor. The valve is hermetically sealed and does not require a solenoid valve installation.

Applications: The valve is suitable for commercial refrigeration in hypermarkets, supermarkets, grocers, hotels, and restaurants, as well as industrial refrigeration and domestic air conditioning systems.

Energy Efficiency: The PWM 2028 valve ensures minimal superheating and allows the cooling system to operate at low condensation temperatures, resulting in significant energy savings. An enthalpy diagram shows a 12% reduction in energy absorption compared to conventional thermostatic valves.

Payback: The additional cost of a driver with a temperature probe and pressure transducer is offset within a few months, depending on energy costs and operating conditions.

Configurations: The valve can operate in a "stand-alone" mode controlled by digital input or in a "monitoring and recording" mode via USB connection for configuration and function monitoring.

Catalog excerpts

SOLENOID EXPANSION VALVE PWM SERIES 2028-2

PIEGA FORATURA Example of possible congurations PWM SERIES 2028 Solenoid expansion valve with interchangeable orice –“Stand alone” operation: a driver controls the PWM valve by digital input –“Monitoring and recording”: by USB connection there is the possibility to congure the driver, monitoring and recording the function of the valve PWM. THERMOSTAT DRIVER Energy saving Pay Back 350 Installing the PWM 2028 valve not only guarantees minimal superheating but permits use of the cooling system with low condensation temperatures, saving considerable amounts of energy. e enthalpy diagram below compares...

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