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
