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CompAir SA (Pty) Ltd

Piston Compressors

Piston Ring Compressor, Piston Compressor, High Pressure Piston Compressor, Linear Piston Compressor

CompAir has been producing piston compressors for over 100 years and our expertise in this field is unsurpassed. We offer a wide range of lubricated and oil-free machines from the smallest requirement such as garages and tool shops all the way up to custom built installations for offshore applications.
The configuration of a piston compressor can be a single cylinder for low pressure/low volume to a multi-stage configuration cable of compressing to very high pressure.
R/RZ Series Piston Compressors  (4 to 12 Bar g, 7.5 to 18.7 m3/min, 45 to 110 kW)
R080Z - R180Z Oil-free and lubricated Champion range has been designed to withstand extremely tough conditions. Available in both open and soundproofed closed configurations, the RZ series is designed for ease of use.
The simple robust construction reduces service and spare parts cost to a minimum. We will take care of servicing with our unique "Compressed Air Without Risk" package.
Compared with other Oil-free compressor systems, savings of up to £10,000 / year are possible using an Oil-free RZ Series. These savings are a result of outstanding on-load efficiency and a power requirement of only 8% when off load.
V-Major Series Piston Compressors 
The V-Major compressor is a slow speed, double acting, water cooled design – lubricated or oil-free, and available for pressures from 1.5 to 20.5 bar g, and power from 90 to 315 kW. CompAir reciprocating compressors have been in production since the 1920's with a policy of constant improvements in design and materials.
Many thousands are in service around the world, providing long term, reliable, energy efficient compressed air in every industry and environment. With over twenty models available, the V-Major and V-Compact have the versatility to meet a wide range of applications.
Oil-free Option
Available with oil free cylinders for applications where oil cannot be tolerated in the gas or air being compressed. Extended piston rods have non-lubricated packings and self-lubricating PTFE piston rings run in corrosion resisting, replaceable, austenitic iron cylinder liners.
Efficient Regulation
The V-Major has three step regulation for full, part, or no load operation to reduce part load power consumption.
Suitable for high-ambient temperatures
These robust compressors work equally well in ambients of up to 55oC. The V-Major is equipped with water jackets and intercoolers to maintain correct running temperatures. Closed circuit cooling systems can be provided for locations where cooling water is not available.
Available Options
  • Vee belt driven
  • Direct coupled motor
  • Suitable for gases other than air
  • Custom built packages / specifications
V-Compact Piston Compressors 
The V-Compact is a free standing, single acting, lubricated or oil free unit set on anti-vibration mounts and is suitable for air or water cooling. Pressures range from 5.5 to 10.5 bar g, and power from 18 to 75 kW.
Oil-free Option
Available with oil free cylinders, for applications where oil cannot be tolerated in the gas or air being compressed.
In-built Reliability
Submerged Gear Type Oil Pump gives positive, force fed lubrication to main bearing and crossheads.
Discharge Pulsation Damper extends valve life. Intercooler ensures cool delivery air to the second stage. An Automatic Drain Valve opens when the compressor unloads.
Comprehensive, clear instrumentation provides monitoring of machine condition
to plan maintenance. Air Intake Filter has low resistance to intake air flow and is combined with a silencer to reduce noise.
Simple Installation
Compact direct coupled design incorporating integral, anti-vibration mounts, requires no special foundations.
Efficient Regulation
Automatic Valve Unloading matches output to system requirements to reduce power consumption costs.
Available Options
  • Air or Water Cooled Intercooler
  • Direct coupled motor or Vee belt driven
  • Custom built packages / specifications

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