The Series 4L Diaphragm Compressor for pressures up to 16,750 psig .

The Sundyne Series 4L Diaphragm Compressor is a highly reliable and robust design available in several sub series models.

  • 4000 Single Stage
  • 4X000 Single Stage
  • 4L Two Stage
  • 4LX Two Stage


Performance Envelope


Maximum Working Pressure  16,750 psi
Maximum Motor Size  40 hp 30 kW
Mounting  L type configuration
Materials of Construction  Process Side: SS
Crankcase: Ductile Iron
Connecting Rod: High Strength Ductile
Crosshead: Aluminum
Cylinder: Ductile Iron
Wrist Pin: Tool Steel
Maximum Displacement 45.9 ft3/min
Speed Range 250 to 400 rpm
Maximum Discharge Temperature 450 °F 232 °C
Stroke Length 4.5 in
Process Connection Flanges 0.5 to 1.5in
Piston Range 0.6 to 7.5in
Crankshaft Diameter 2.5 in
Crankpin Diameter 1.25 in
Main Bearing Type Tapered Roller
Crank Bearing Type Babbit Sleeve
Crank Pin Bearing Type Needle
Lubricant-ISO 68
Lubrication Type Splash
Sump Capacity-Quarts 10
Oil Cooler NRQ
Cooling Type Water Cooled

API American Petroleum Institute
The American Petroleum Institute (API) has been working to standardize industrial equipment and operations via the development of API standards since 1924.

  • Petrochemical
  • Specialty Gases
  • Silicon Manufacturing