Refrigeration Compressors

We offer customers a wide range of refrigeration compressors. These `SRA-Series' compressors are precision designed and robust machines capable of running continuously for longer periods with minimum attention requirements. These are also suitable for all normal applications & operating conditions.

Compressor Components :

Crankcase and Cylinder Housing –

• Iron /steel based bodies
• Easy access to interiors of the compressor for inspection
• Cleaning/ adjustment of motion work can be gained by removing back.-end cover/ single hand hole cover provided for this purpose
• All models fitted with an, oil level sight glass & drain plug

Crankshaft –

• Two- throw type crankshafts forged of special alloy steel
• Accurately machined and feature fine ground finish bearing surfaces
• Dynamically balanced shafts to minimize vibration
• Carried on two wrapped bimetallic bushes within the crankcase
• Whenever necessary this type of bearing can easily be replaced
• Crankshaft thrust washers fitted to one end of the crankcase that can also be easily replaced

Crankshaft Gland Seal –

• Crankshaft gas sealed at gland end by a flexible multi spring precision seal
• It is continuously lubricated & cooled by oil from pressure feed system while compressor is running
• Sealing faces are made using tungsten carbide and bronze to deliver optimum functionality and service life standards

Cylinder Liners -

• Liners based on high tensile cast iron with fine ground external & honed internal finish

Connecting Rods-

• Connecting rods are H section steel stampings fitted with slip-in steel backed white-metal lined big end bearings as well as bronze small end bushes

Pistons –

• Pistons made of aluminum alloy
• These are fitted with 3 compression & 2 oil scraper rings to provide efficient gas sealing and good oil control

Valves –

• Ring plate type suction & delivery valves made of special alloy steel
• Suction valve arranged to seat on flanged head of the cylinder liner
• Delivery valve & seat form part of the safety head assembly
• Both valves are spring loaded for positive action

Safety Head –

• Safety head in each cylinder held down by heavy coil spring against which it can lift to relieve undue pressureGas Strainer –

• Gas strainer conveniently housed on suction connection of machine that makes them easily removable for cleaning without difficulty
• Felt filter provided for fitting inside strainers during compressors running-in period to trap scale & other impurities scoured from system by the refrigerant

Delivery Manifold –

• Delivery manifold is a common header into which gas from several cylinders is discharged
• Manifold designed to prevent minimum heat exchange surface between suction & delivery gas passages (this feature assumes importance when machine is used as an ammonia compressor)

Lubrication –

• Oil under pressure supplied to all bearings & crankshaft seal by means of gear pump driven directly from the end of the crankshaft
• Oil in pump drawn into suction unit through fine mesh strainer & delivered to bearings by way of `felt element' oil filter
• Magnet provided to trap any magnetic particles
• A crank case oil level sight glass fitment provided