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Safety SQM Series Gas-Liquid Separators
The sunction accumulator is an important part of the refrigeration system. The most important function of the separator is to separate the gaseous and liquid refrigerants for preventing “liquid slugging” of compressor (liquid refrigerants flows into the compressor). Reasons to cause “ Liquid Slugging”： Improperly installed piping（inlet-outlet） Insufficient capacity of evaporator Expansion valve selection error Refrigerants overcharging Over Frosting of evaporator Evaporator fan not running Insufficient heat insulating and low environment temperatures of suction pipes Recommendations to install: Compressor parallel Two-stages compression refrigeration/compound refrigerants compressor Flooded evaporation system Defrosting system by superheated vapour Heat-pump system Over-heat degree lower than 7K system Attentions to choose： Determine the relationship between the volume of the sunction accumulator and the amount of the system refrigerants charging. Basically, the sunction accumulator can store 30 percent to 50 percent refrigerants of the system. The flow velocity of U-shaped vertical raising pipe not lower than 7.5 m/s in order to favorable oil return effect,and not greater than 12 m/s, especially low evaporating temperature system. Capacity controlled refrigerating units should be considered the velocity of the suction pipe;for the parallel compressor unit, the multiple suction pipes of the separator should be the best choice. (Multiple suction pipes separator is installed behind the suction pipe, one suction pipe for one compressor to make sure every compressor can get the same velocity). Vertical installation Install close to the suction inlet of the compressor Designed pressure: 3.0MPa Applicable refrigerants models: R134a, R22, R407c, R404A, R507A