Metro Refrigeration  Pvt. Ltd.
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Refrigeration Compressors

Metro high speed reciprocating compressors are manufactured with latest technology and most modern method. These compressors are available in capacities up-to 12 cylinders in V & W arrangements.

Suitable for industrial applications, Metro Compressors have compact design, built in suction and discharge manifold with large size suction filter for protection of vital parts. All welded steel construction of crankcase unit with provision of unloaded starting system and the safeguard against incidental liquid hammer. The crank case is fully leak & impact proof, the smooth internal surfaces of the crank case provides better condition for lubricants. Every parts is precision made and interchangeable. These compressors are suitable for V-belt and Direct drive system. Our heavy duty Compressors can work smoothly for 24 hours continuously for a long span of time.

Refrigeration Compressors
Ammonia Compressor High Speed - Single Cylinder
Refrigeration Compressors
Ammonia Compressor High Speed - 2 Cylinder
Refrigeration Compressors
Ammonia Compressor High Speed - 3 Cylinder


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Piston / Cylinder Liner:

Pistons are made from special aluminum alloy. Gudgeon pins are case hardened steel and grounded. Cylinder liners are made from special close grain alloy casting, precision boring, horning and pressed into cylinders blocks. These liners can be easily replaced. Hydraulically operated valve lifting mechanism on each cylinder ensures absolute capacity control and fully unloading start.

Connecting Rod:

The connecting rod is die forged. It has steel backed White Metal shells on its big end bronze bearings, While the smaller end has a wear resistant metal.

Crankshaft & Bearings:

Has exceptionally good running metal properties and wear resistance. All bearing surfaces are grounded and dynamically balanced. The main Bearings are white metal lined steel shells, the intermediate bearings are provided with split type for 4,6,9 & 12 cylinder compressor.

Lubrication :

Forced feed system is provided by crankshaft driven gear type oil pump that delivers oil to all bearings and capacity control system.

Refrigeration Compressors
Ammonia Compressor High Speed - 6 Cylinder
Refrigeration Compressors
Ammonia Compressor High Speed - 7 Cylinder


Shaft Seal Assembly:

The rotary face type, sliding surfaces are grounded to an extreme finish and lapped. Frictional heat is removed by the full flow of lubricating oil that is directly fed from oil pump with provision of water cooled system too.

Standard Accessories :

Every Metro Compressor is dispatched to the customer with the following standard accessories:

Drive set :

  • Consisting of V- belts, Motor Pulley & Flywheel
  • Plain base plate with foundation bolts
  • Suction & Discharge Service valves (Shut-off valves)
  • Pressure gauge, gauge board and mounting stand.
  • Ferrules and pipes
  • Hour meter
  • Indicator- Bulbs & Switches
  • Manual Regulator Capacity Control
  • Oil Filter Set
  • Rubber Seal Sets
  • Tools Kit Box

Refrigeration Compressors
Ammonia Compressor High Speed - 9 Cylinder

Optional Items

  • Base Frame Unit for compressor & Motor with foundation bolts
  • Crank Case heater for 2 stage
  • Interstage Cooling system for 2 stage
  • Cut-off switches L-P-H-P. & O.P
  • Electrically operated capacity control
  • Oil Separator
  • Equalizer connections for parallel running of Compressor
  • Flexible direct coupling with guard
  • V-Belt guard for Motor & Compressor

Refrigeration Compressors
Ammonia Compressor High Speed - 12 Cylinder

Single Stage Refrigeration Compressors

Technical Data : Refrigeration (NH3) Compressors –Single Stage

S. No Model MC-10 MC-20 MC-30 MC-40 MC-60 MC-90 MC-120
1. Cylinder Arrangement 1 L 1 x V 1 x w 2 x v 2 x W 3 x W 3 x W
2. Nos. of Cylinder 1 2 3 4 6 9 12
3. Cylinder Bore (mm) 160 160 160 160 160 160 160
4. Piston Stoke (mm) 114 114 114 114 114 114 114
5. Suction Size (mm) Discharge Size(mm) 50 65 80 80 100 125 150
40 50 65 65 80 100 100
6. Swept Volume (Cu.m³/hr) 135 270 405 540 810 1215 1620
7. Permissible Speed V-belt driven from 450 to 1000 R.P.M. In steps of 50 RPM (Minimum - 450 / Normal - 750 / Maximum - 1000 RPM)
8. Oil Charge Capacity (Ltr.) 12 14 16 20 22 30 35
9. Gross Weight (Khs) Gross Weight (Khs) 860 970 1190 1400 1975 2850

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Two Stage Refrigeration Compressors

Technical Data : Refrigeration (NH3) Compressors - Two Stage

S. No Compressor Model MC-21 MC-31 MC-42 MC-51 MC-63 MC-72 MC-84 MC-93 MC-102
1. Cylinder Arrangement 1 x V 2 x V 2 x W 2 x W 3 x W 3 x W 4 x W 4 x W 4 x W
2. Nos. Compressor L.P 2 3 4 5 6 7 8 9 10
3. Nos. Compressor H.P 1 1 2 1 3 2 4 3 2
4. Cylinder Bore (mm) 160 160 160 160 160 160 160 160 160
5. Piston Stroke (mm) 114 114 114 114 114 114 114 114 114
6. Suction Size (mm) 80 80 100 100 125 125 125 125 125
7. Discharge Size (mm) 65 65 50 50 50 50 50 50 50
8. Swept Volume (m³/hr) 275 412 548 687 823 960 1097 1234 1371
9. Permissible Speed V- belt driven from 450 to 1000 R.P.M in steps of 50 RPM (Minimum -450/ Normal -750 / maximum-1000 RPM)
10. Oil Charge Capacity 12 20 22 22 30 30 35 35 35
11. Cooling flow for each cylinder Jackit 12 - LPM Cylinder at water inlet temp. 35°C
12. Gross Weight (kgs) 970 1190 1400 1400 1975 1975 2850 2850 2850

These are only guide lines. All specifications are subject to change without notice.

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