Danfoss upgrades solenoid valves


05 March 2018
Danfoss says its latest range of EVR v2 solenoid valves is compatible with more refrigerants and a broader range of applications, delivering reduced running costs without compromising on reliability from cold rooms to chillers and heat pumps.

The EVR range is aimed at a wide range of air conditioning and refrigeration applications and the company says key features have been applied to enhance design robustness s, increase functionality and make service easier.
Air conditioning:
Danfoss says the superior max. OPD and min. OPD (Opening Pressure Differential) deliver greater performance in high temperature applications (105 °C) and are optimised for variable refrigerant flow conditions (example variable speed systems) or use with variable speed technology. Designed to stand higher Maximum Working Pressure (MWP) up to 45 bar, the same model valve is compatible with higher pressure refrigerants such as R410A and is applicable to heat pumps or chillers running in ambient temperatures (up to 130°C in shorter for hot gas defrost and bypass) during periods of maximum loads. Qualifications are planned in 2018 for alternative mildly flammable and flammable refrigerants to be used in larger chillers.

Commercial refrigeration and food retail:
The new EVR valve platform covers a wide range of functions, applications, and refrigerants. The platform is approved for lower-GWP (Global Warming Potential) refrigerants, including R290 propane. Besides, tight solenoid closure safeguards the system and contribute to food safety and with enhanced flow characteristics for high efficiency. In the liquid line, the tight shut off prevents refrigerant flow back to the compression side. In the discharge line, the Danfoss EVR v2 can withstand high temperatures and save on energy consumption compared to other defrost methods. 

The valves can be used for applications such as food retail display cases since they enable service and maintenance to be carried out quickly, with no disruption to store trading hours. There is no need to de-solder the complete valve and put a new one into the system. The valve body is left in place, with the internal part replaced as required.

Allan Chara, Marketing Director Cooling Refrigeration Controls. said: “From April , the new EVR range will have completely  replaced the production of the EVR, EVRE and EVRH ranges. Having fewer but more versatile models will suit more applications and refrigerants while being backward compatible.

“We now offer a revitalised range of products and services for key air conditioning and refrigeration business, compatible with today demands for higher reliability, versatility and efficiency to meet the demands of the industry.''

The  range is available for cooling capacity from 3 to 410kW (0.85 to 116 tons) in liquid line, 0.3 to 65kW (0.08 to 18.3 tons) in suction line and 1 to 350 kW (0.28 to 99 tons) for hot gas bypass, with connection sizes from 6 mm to 42 mm - 1/4” to 2 1/8”. They have the same built-in length as the actual EVR with the corresponding connection size except for the bi-metal connections.
The changeover does not impact the coil program (SCN-SCT) and the EVU/L/CSV non-serviceable valves.
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