Frequency control (optional) SO series inverter control units to choose from. The unit can be adjusted according to the gas consumption displacement piston compressor model, thus saving energy. External drive can be also built-in, load control motor speed adjustment. Inverter unit can be used alone, Shandong piston compressor, an ideal choice given the speed and multiple units simultaneously, in order to meet peak demands. When the gas consumption is larger piston compressor offer can be combined for use with a centrifuge. According to the classification used in refrigerants, generally two kinds of ammonia compressor and freon compressor. By compression piston compressor stages classification, a single-stage compression and two-stage compression. Single-stage compressor means during compression of the refrigerant vapor from the low pressure to high pressure after only primary compression. The so-called two-stage compression, the compression process refers to the refrigerant vapor from the low pressure to high pressure to be twice continuously compressed. Piston compressor Sellers | Xingchang piston compressor (certified) | piston compressor is provided by Xingchang Pneumatic Machinery Co., Ltd. Qingdao. Qingdao Xingchang Pneumatic Machinery Co., Ltd. (www.xckyj.com) is a leader in Qingdao, Shandong, industry-specific equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Xingchang Pneumatic Machinery leadership with the staff warmly welcome all inquiries negotiations to create Xingchang Pneumatic Machinery a better future.