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Personne àcontacter Ms. Hairong
8#,No.499,Yifu Rd.,Jiufu Industrial Garden, Shanghai, Shanghai
FRASCOLD two stage compressors are particularly suitable to operate with refrigerants R**4a, R**7 and R*2. They are efficient and reliable in a wide application range. The main features of two stage compressors are: optimal mass distribution to grant a extremely quiet and smooth running; shaft with specific heat treatment; piston shape optimization; chromium-plated rings to reduce friction and oil circulation; only for V and Z series compressors; lubrication by means oil pump with reversible type gear; particularly sized valve plate to optimize the efficiency in both stage; electric motor designed to get high efficiency and protection to winding overheating; injection valve that directly regulates the discharge temperature of second stage by means refrigerant injection; such a way, high pressure side temperature is held with the set value. Standard equipment The compressors are supplied with: suction and discharge valves, sweat connection type; rubber vibration absorbers; lubricant charge; nitrogen holding charge (1 bar) to protect them against humidity; oil sight glass; only for V and Z series compressors, high discharge temperature protection by means electronic module; All compressors are coated with anti-rust protective primer and blue enamel coat. Accessories On request, compressors can be supplied with following accessories assembled in factory: kit for liquid subcooling complete with heat exchanger, solenoid valve on the liquid; injection piping, sight-glass, filter-dryer and themostatic expansion valve for liquid injection only for S series compressors, high discharge temperature protection device; crankcase heater Electrical protection For all compressors, protection is performed by means a series of PTC thermistors placed into the stator winding of the electric motor and plugged to an electronic control module.
