Semi-Hermetic Compressors for Refrigeration
Semi-Hermetic Compressors for Refrigeration

For years Emerson’s semi-hermetic compressors have been the efficiency choice in refrigeration. Discus™ compressors have led the industry in terms of energy efficiency for decades, delivering up to 10% more efficiency than any reed reciprocating compressor technology offered by other manufacturers. The performance of those reed reciprocating compressors meets basic market requirements but cannot compete either with Discus compressors nor with the new Stream series in terms of low energy consumption. 

 

Stream Series:

  • One model for multi-refrigerants R404A, R407F, R407A/C, R134a and R22
  • New range of four and six cylinder compressors from 62–153 m3/h
  • Extended cooling capacity and up to 15% more efficient than the next best competitive compressor
  • Emerson CoreSense™ Diagnostics technology providing advanced protection, diagnostics and preventive maintenance 
  • Continuous capacity modulation with inverter
  • Optional dedicated sound shell for 10 to 15dBA attenuation

Stream Digital Series:

  • One model for multi-refrigerants R404A, R407F, R407A/C, R134a and R22
  • Continuous modulation from 50–100% (four cylinder) and 33–100% (six cylinder) ensuring a perfect match of capacity and power to load
  • Economical and reliable alternative to frequency inverters
  • Precise suction pressure control with associated energy savings and stable evaporating temperatures
  • Quick and easy integration into refrigeration equipment, similar to any other standard compressor

Stream Series for CO2-transcritical:

  • Designed for durability and performance in R744 applications
  • Extremely low sound and pulsation
  • Compact dimensions
  • Continuous capacity modulation with inverter
  • Emerson CoreSense Diagnostics technology providing advanced protection, diagnostics and preventive maintenance

Discus Series:

  • One model for multi-refrigerants R404A, R134a, R407C and R22
  • Highest level of efficiency available on the market, whatever the refrigerant and operating condition 
  • Condensing limit as low as 5°C
  • Compatible with use of frequency inverters from 25–60Hz
  • Digital technology for 10–100% capacity modulation
  • Integrated oil pump and electronic Oil Pressure Switch OPS2 for maximum reliability

S Series:

  • One model for multi-refrigerants R404A, R134a, R407C and R22
  • Integrated oil pump for maximum reliability 
  • Low condensing limits
  • K and L Series 2-Cylinder compressors from 0.5–4 HP ideal for condensing unit or transport applications
  • 2S, 3S, 4S, 6S, 8S series of two to eight cylinder compressors for supermarket packs and process cooling application

 

2-Stage Series:

  • For refrigerants R404A and R22
  • Dedicated to extremely low temperature applications
  • Large operating envelope down to -60°C evaporating
  • Available from 15–25 HP

The Stream series is Emerson’s new line of semi hermetic reciprocating compressors. It was developed with the promise to be even more efficient than Discus. The Stream series is a brand new line of four and six cylinder compressors with best in class performance for today’s HFC, natural and low GWP refrigerants. The Stream series compressors are specially designed for low and medium temperature refrigeration applications and will at term replace the S series and the Discus series.

Emerson’s innovative technologies such as Discus, digital continuous capacity modulation, CoreSense Diagnostics for advanced protection, diagnostics and preventive maintenance, or Emerson sound shell give manufacturers, installers and end users the right tools to reduce installations’ carbon footprint, optimize system design, efficiency, sound and reliability while ensuring long equipment life time and minimizing capital and operating cost.

Emerson’s semi hermetic range of compressors offers many benefits:

  • Efficiency: Discus valves replace traditional “reed” valves and are integrated in the valve plate. This special design eliminates the dead volume at the end of the compression and enables the highest compressor efficiency
  • Multi refrigerant compressors: each model is compatible with the most commonly used refrigerants which helps to reduce product complexity and simplifies equipment design.
  • Simple continuous capacity modulation when using digital technology for continuous control from 10 to 100%.
  • Low sound: Stream is one of the quietest reciprocating compressors on the market. The Stream sound shell provides for further sound reduction by an additional 15 dBA.
  • Advanced protection, diagnostics and preventive maintenance with CoreSense™ Diagnostics.


Click here to find out more about Stream and its five key benefits.

Select your refrigeration compressor by application and refrigerant: 

 REFRIGERANT

 S-Series

DISCUS

Stream

STREAM DIGITAL

2-STAGE

 BOOSTER

 R404A

 MT    LT

 MT     LT

MT   LT

MT     LT

 LT

 LT

 R407C

 MT

 MT

MT

MT

 

 

 R134a

 MT

 MT

MT

MT

 

 

 R-22

MT     LT

 MT     LT

MT  LT

MT     LT

LT 

LT 

 R744 (CO2)

 

 

MT  LT

 

 

 

 R407A

 

 

MT

MT

 

 

 R407F

 

 

MT

MT