Brief introduction:
Screw compressor unit with double compressors and double stages designed and developed and produced by our company consists of one low pressure stage compressor, one high pressure stage compressor, two motors, one horizontal oil separator, a set of oil-supply system and oil pump, one micro-computerized control system, one inter cooler and etc. It features compact size, easy operation, simple system, higher refrigerating efficiency and etc.
It has a refrigerating circulation with two-stage compression, one-stage throttling and incomplete cooling during compression. It also features two-stage super-cooling, so volume ratio matching of compressors is very flexible, and the refrigerating efficiency is higher. It has more than twenty kinds and four basic outline. Under -40℃/+35℃, COP value will increase by 32% compared to the single compressor unit with economizer, and increase by 13% compared to the single compressor unit with double stages. It is controlled through micro-computerized touch screen, easy operation. Easily operate by PLC complete automatic control.

Production features:
Ⅰ. Best solution for -30℃-55℃ low temperature refrigeration.
Ⅱ. Many patented products.
Ⅲ. COP value will increase by 32% compared to the single compressor unit with economizer, and increase by 13% compared to the single compressor unit with double stages.
Ⅳ. Compact, easy operation, low running and maintenance cost.
Ⅴ. PLC complete automatic control.
Ⅵ. Volume ratio matching of compressors is very flexible. The compressor with the optimum discharge and volume ratio will be selected according to different conditions and refrigerants.

Working conditions：
Evaporating temperature:-30℃～-55℃ Condensing temperature: ≤45℃
Discharge temperature: ≤105℃ Oil temperature: ≤65℃