Single Stage Compressors – SRM SERIES

The open-drive SRM screw compressor remains the reliable workhorse for its versatility and robustness. Upgraded by the new i-profile rotors with 5/7 lobes and further improved by extra-strong bearings the SRM Series still is the benchmark of industrial refrigeration.

Single Stage Compressors:

SRM open-type single-stage Screw Compressors include 6 series (SRM 12, 16, 20, 26, 34 and 41),  totaling 19 models with a displacement of 265 – 10850 m3/h @ 2960 rpm. A large application window caters for a wide range of applications. Whereas all major refrigerants can be used, our compressors are optimized for the natural and environment-friendly refrigerants such as Ammonia R717 and Hydrocarbons like R290, R600 and R1150.

High rotor speeds of up to 6000 rpm for the smallest compressor allow the use of frequency inverters, step-less (10%- 100%) mechanical capacity control and adjustable Vi ensure high efficient operation at varying load and temperature profiles, thus guaranteeing high SEER values.

The robust design and high degrees of obliquity >30° to withstand the rolling and pounding sea allow the use in marine applications.

Features of SRM open-type single-stage screw compressor:

  • “I”type patented profile, best lobe ratio of 5+7, high efficiency.
  • Thanks to the ratio 5-7 the rotor shafts have a larger diameter assuring an increased stiffness.
  • Rotor is made of high- quality forged steel with micron- machining accuracy, high strength, high wear resistance, and long durability.
  • The housing is made of high- strength ductile iron, design pressure: 2.8 Mpa.
  • Innovative shaft seal. The wear- resistant sealing surface is made of silicon carbide for high reliability.
  • High- precision and wear- resistant roller bearings designed for a life span of 100.000 operating hours.
  • The internal compression ratio Vi can be adjusted to the existing operating conditions either manually or automatically for highest efficiency, even under varying conditions.
  • Stepless capacity control (10-100%) by a mechanical slider.
  • Integrated oil channels for secure lubrication of all critical spots within the compressor.
  • Labyrinth closure between the bearings and screws assuring a clean and refrigerated oil at all the bearings.
  • Special internal design that allows a low pressure at all bearings. This assures a sufficient lubrication without the need of an oil pump. The oil pump is only used for a pre lubrication at the start.

More information:

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