With more than 70 years of innovative design, Sauer Gas Compressors have long convinced customers of their worth in numerous fields of application for process engineering that requires high quality compressed gas or air. Experience and know-how make it possible as well as individually designed compressor packages. Today we offer 3- and 4-stage gas compressors for up to 7250 PSI in an extensive, and standardized, product range.
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Sauer WP311L Booster

Boosters and Gas Compressors
Sauer WP311L Booster

Boosters and Gas Compressors
Sauer WP311L Booster

Boosters and Gas Compressors
Sauer WP311L Booster

Boosters and Gas Compressors
Sauer WP311L Booster

Boosters and Gas Compressors
Stages/Cylinders N/A 4 N/A 2 or 3 4 or 6 N/A 1 N/A 3 N/A 3 4
Models N/A WP4331 WP4341 WP4351 N/A WP6305 WP6442 N/A WP15L WP22L WP33L WP33LB WP45L, WP65L WP65LB N/A WP101L WP121L WP126L WP151 WP156L WP206L WP271L WP276L WP311L, WP316L WP66L WP81L N/A WP3325 WP4325
Operating Pressure Range N/A 1750 to 5800 psi N/A 200 to 7250 psi N/A 150 to 580 psi N/A 150 to 1150 psi N/A 2000 to 6090 psi
Required Power N/A 20 to 75 hp N/A 150 to 290 hp N/A 5 to 30 hp N/A 20 to 100 hp N/A 6 to 20 hp
Flow Rate N/A 18 to 70 scfm N/A 230 to 518 scfm N/A 6.9 to 140 scfm N/A 39 to 178 scfm N/A 6 to 18 scfm
Multi-Stage Oil-Lubricated Piston Compressor N/A Standard N/A N/A Standard N/A Standard N/A
Inter-Stage and Final After-Cooler with Oil/Water Separators N/A Standard N/A N/A Standard N/A Standard N/A
Over-Pressure Safety Valves at Each Stage N/A Standard N/A N/A Standard N/A Standard N/A
Gas-Tight Over-Pressure Safety Valves at Each Stage (Piped Exit and Manifold) N/A Optional N/A N/A Optional N/A Standard N/A
Automatic Oil/Water Drain Valves N/A Standard N/A N/A Standard N/A Standard N/A
Auto-Starting Relief Integrated with Drain System N/A Standard N/A N/A Standard N/A Standard N/A
Pressure Indicator at Each Stage N/A Optional N/A N/A Optional N/A Standard N/A
Gas Over-Temperature Protective Shutdown Sensor N/A Standard N/A N/A Standard N/A Standard N/A
Oil Lubrication Including Protection Sensor N/A Optional N/A N/A Optional N/A Standard N/A
Pressure and Temperature Indicators and Sensor-Switch at All Stages N/A Standard N/A N/A Standard N/A Optional N/A
Air-Blast Cooling Fan and Flywheel N/A Standard N/A N/A Standard N/A Standard N/A
Lubricating Oil Level Alarm N/A Standard N/A N/A Standard N/A Optional N/A
Gas Suction Connection (Flange and Pipe) N/A Standard N/A N/A Standard N/A Standard N/A
Crankcase Oil Sump Heating N/A Optional N/A N/A Optional N/A Optional with Non-Explosion Proof Model only, Not available in Explosion Proof Model N/A
Ex-Proof Crankcase Oil Sump Heating N/A N/A N/A N/A Optional with Explosion Proof Model only, Not available in Non-Explosion Proof Model N/A
Flexible Drive Coupling N/A Standard N/A N/A Standard N/A Standard N/A
Direct Drive Electric Motor N/A Standard N/A N/A Standard N/A Standard with Non-Explosion Proof model only, Not available with Explosion Proof Model N/A
Direct-Drive Ex-Motor (Atex) N/A Optional N/A N/A Optional N/A Standard with Explosion Proof Model, Optional with Non-Explosion Proof Model only N/A
Resilient AV Mounts N/A Standard N/A N/A Standard N/A Standard N/A
Outlet Flexible Hose with Non-Return Valve N/A Standard N/A N/A Standard N/A Standard N/A
Flexible Oil/Water Drain Hose N/A Standard N/A N/A Standard N/A Standard N/A
Auto Start-Stop Pressure Sensor Control N/A Standard N/A N/A Standard N/A Optional N/A
Oil/Water Drain Gas Separator 'Demister' Vessel N/A Optional N/A N/A Optional N/A Optional N/A
Oil/Water Collection Tank N/A Optional N/A N/A Optional N/A Optional N/A
Oil/Water Collection Tank (Level Alarm) N/A Optional N/A N/A Optional N/A Optional N/A
Electrical Control Panel (Safe Area, Start/Stop, Alarms, and Shutdowns) N/A Optional N/A N/A Optional N/A Optional N/A
Acoustic Enclosure (Internal Heater, Fan Ventilation, and Gas Detection) N/A Optional N/A N/A Optional N/A Optional N/A
Ex-Proof Drive Coupling (Atex 95) N/A Optional N/A N/A Optional N/A Standard with Explosion Proof Model, Optional with Non-Explosion Proof Model only N/A
Anti-Static Air-Blast Cooling Fan (Atex 95) N/A Optional N/A N/A Optional N/A Standard with Explosion Proof Model, Optional with Non-Explosion Proof Model only N/A
Intrinsic Safe Relays for Pressure and Temperature Monitoring N/A N/A N/A N/A Optional with Explosion Proof Model only. Not available in Non-Explosion Proof Model N/A
Intrinsic Safe Terminal Box for Electrical Connections N/A N/A N/A N/A Optional with Explosion Proof Model only. Not available in Non-Explosion Proof Model N/A
Electrical Control Panel to Atex Zone 1 and 2 N/A Optional N/A N/A Optional N/A Optional with Explosion Proof Model only. Not available in Non-Explosion Proof Model N/A
Supply Gas Pressure Sensor Control (Auto-Stop/Restart) N/A Optional N/A N/A Optional N/A Optional N/A
Supply Gas Isolating Valve (Manual, Solenoid, Actuator, and Electrical Inter-Lock) N/A Optional N/A N/A Optional N/A Optional N/A
Supply Gas Non-Return Valve N/A N/A N/A N/A Optional with Explosion Proof Model only. Not available in Non-Explosion Proof Model N/A
Supply Gas Excess Flow Valve N/A N/A N/A N/A Optional with Explosion Proof Model only. Not available in Non-Explosion Proof Model N/A
In-Line Gas Suction Filter N/A Optional N/A N/A Optional N/A Optional N/A
Suction Gas Regulation (Pressure Reducing Valve) N/A Optional N/A N/A Optional N/A Optional N/A
Suction Gas Shut-Off Valve (Solenoid and Actuated) N/A Optional N/A N/A Optional N/A Optional N/A
Capacity Control (Re-Cycling By-Pass Valve and Discharge Back to Suction) N/A Optional N/A N/A Optional N/A Optional N/A
Inlet Gas Pulsation Damper (Suction 'Buffer Tank' Inc. Drain/Purge Valve) N/A Optional N/A N/A Optional N/A Standard N/A
Suction Gas Protection (Safety Valve, Pressure Gauge, and High/Low Pressure Sensor-Switch) N/A Optional N/A N/A Optional N/A Standard N/A
Flexible Suction Gas Hose N/A Optional N/A N/A Optional N/A Optional N/A
Outlet Oil Coalescing Filtration (Manual and Auto Drain) N/A Optional N/A N/A Optional N/A Standard with Explosion Proof Model, Optional with Non-Explosion Proof Model only N/A
Outlet Oil Vapor Activated Carbon Filtration (Manual Drain) N/A Optional N/A N/A Optional N/A Optional N/A
Outlet Purge Connection N/A Optional N/A N/A Optional N/A Standard with Explosion Proof Model, Optional with Non-Explosion Proof Model only N/A
Final Pressure Maintaining Valve N/A Optional N/A N/A Optional N/A Standard with Explosion Proof Model, Optional with Non-Explosion Proof Model only N/A
Gas Drying (Suction and Outlet Hp Dryer) N/A Optional N/A N/A Optional N/A Optional N/A
Auto Stop/Start Pressure Sensor Control N/A Optional N/A N/A Optional N/A Optional N/A
Gas Recovery, or 'Blow-Down' Vessel (Purge, Drain, Safety Valve, and Pressure Gauge) N/A N/A N/A N/A Standard N/A