The Series 4L Diaphragm Compressors for pressures up to 16,750 psi

Designed for processes engineers requiring reliable operation in the full range of high pressure services

The PPI Sealless Series 4L Diaphragm Compressor is for pressures up to 16,750 psi and 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

MARKETS

  • Petrochemical
  • Specialty Gas
  • Energy
  • R&D

PPI Diaphragm Compressors Series

All PPI diaphragm compressors deliver total assurance of non-contaminating gas compression. Boasting a leak tight mechanism that features static seals which do not need to be purged or vented, these compressors present absolutely zero leakage threat to the atmosphere, providing an ideal solution for safely handling ultra-pure, corrosive and volatile gases. Additionally, our diaphragm compressors are designed to isolate the process media from the piston or piston rings with a set of metallic diaphragms, completely eliminating the risk of cross contamination. Most models are built to meet API 618 standards where applicable to diaphragm compressors. These machines are available in a variety of flexible configurations and sizes, making them easily customizable to provide the ideal compressor for your application. Backed by our global network of Authorized Service Centers and support staff, PPI sealless diaphragm compressors are the reliability-focused solution for customers operating in the petrochemical, refining, electronic gas, specialty gas and polysilicon production industries.

Durability

We have thousands of compressors installed in extreme operating environments, such as refineries, petrochemical facilities and immaculately clean research centers; but no matter where they are installed, diaphragm compressors deliver high performance, lubricant- and particulate-free compres- sion of gases and mixtures. Plus, our proprietary Ultrafram diaphragm technology and proprietary cavity design provide unmatched diaphragm life.

Reliability

PPI diaphragm compressors feature heavy duty components custom engineered to ensure reliable operation. We performance test every compressor in the factory and document operating data to meet your specific service and operating parameters.

  • Proprietary designs evolved from years of field experience assures reliability in the most demanding applications and environments
  • Thorough factory testing prior to shipment verifies guaranteed test point
  • Critical components, including the crankcase assembly and connecting rod(s), are designed for long life with minimal maintenance

US 60 Hz

  • Maximum Working Pressure               16,750 psi
  • Maximum Motor Size                           40 HP
  • Mounting                                               L Configuration
  • Maximum Displacement                      45.9 ft3/min
  • Speed Range                                         250 to 400 rpm
  • Maximum Discharge Temperature       450°F
  • Stroke Length                                         4.5 in
  • Process Connection Flanges                0.5 to 1.5 in
  • Piston Range                                          0.6 to 7.5 in
  • Crankshaft Diameter                             2.5 in
  • Crankpin Diameter                                1.25 in
  • Main Bearing Type                                Tapered Roller
  • Crankpin Bearing Type                          Babbit Sleeve
  • Wrist Pin Bearing Type                          Needle
  • Lubricant-ISO                                          68
  • Lubrication Type                                     Pressurized
  • Sump Capacity                                       10 Qts
  • Oil Cooler                                               Not Required
  • Cooling Type                                          Water Cooled

Metric 50 Hz

  • Maximum Working Pressure               1,155 bar
  • Maximum Motor Size                           30 kW
  • Mounting                                               L Configuration
  • Maximum Displacement                      45.9 ft3/min
  • Speed Range                                         250 to 400 rpm
  • Maximum Discharge Temperature       232°C
  • Stroke Length                                          114 mm
  • Process Connection Flanges                 38 mm
  • Piston Range                                           191 mm
  • Crankshaft Diameter                             64 mm
  • Crankpin Diameter                                32 mm
  • Main Bearing Type                                Tapered Roller
  • Crankpin Bearing Type                          Babbit Sleeve
  • Wrist Pin Bearing Type                          Needle
  • Lubricant-ISO                                          68
  • Lubrication Type                                     Pressurized
  • Sump Capacity                                       9.5 Ltrs
  • Oil Cooler                                               Not Required
  • Cooling Type                                          Water Cooled

Process Side: Stainless Steel

Crankcase: Ductile Iron

Connecting Rod: High Strength Ductile

Crosshead: Ductile Iron

Cylinder: Ductile Iron

Wrist Pin: Tool Steel

Performance Envelope