Danfoss check valve

Check valve can be used in the use of fluoride refrigerants and air conditioning unit liquid, suction and hot gas pipeline. Oversized connections are available to increase the flexibility of the check valve applications. The valve can ensure only correct flow direction. There are two forms of straight and angle valves. Prevent reflux of refrigerant from the evaporator temperature to a low temperature evaporator. Built-in damping piston, so that the non-return valve can be installed in a pressure pulse places, such as the discharge line of the compressor. NRVH have △ P = 0.3bar plus elastic spring, used in refrigeration equipment compressors in parallel. Maximum operating pressure: PB = 46bar maximum test pressure: p '= 60bar medium temperature: -50 ~ + 140 ° C choose the check valve installed in the compressor discharge line, be sure to pay attention to the following requirements: The check valve The pressure drop must always be higher than the given minimum pressure drop when fully open. This requirement is also suitable to have the lowest energy regulatory function of the compressor load. Use NRVH type check valve, can be avoided in some refrigeration equipment under conditions consistent with resonance problems. In the partially compliant runtime by pressure NRVH valve must not drop below the minimum NRVH valve is fully open when a given pressure drop.