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These are designed to compress a polyethylene in «Polymir» type processing lines for low density polyethylene production applying a method of high pressure.

Fresh ethylene compressors (LP compressors) are made on the opposite base 4M16 with three stages and electric drive that ensures smooth adjustment of capacity by changing the rotational speed from 100 to 320 rpm/min.

Reaction pressure compressors (HP compressors) are made on the opposite base 4M40 with hydro mechanical transmission of motion from cranking mechanism to actuating elements of cylinder of both stages.

Reciprocating mechanism is lubricated by oil circulated under pressure being produced by pump. Cylinders and sealing devices of the rods are force lubricated under pressure being produced by multi-plunger pump. These are cooled by water with close discharge.

Automatic monitoring, control and protection system ensures a remote programmed start up and shutdown of the compressor, warning and alarm signaling, as well as blocking of driving electric motor on parameters deviation from the set values. 

Specification

Compressor
model

Compressed
medium

Capacity

Abs. Pressure,
MPa

Consumed
power, kW

Engine’s type

m3/min

Standard
m3/min

suction

discharge

     4GM16-12.5/17-281

Ethylene

12.5

137

1.7

28.1

870

Electric motor

     4GМ16-14/14-281

Ethylene

14

164

1.4

28.1

1100

Electric motor

4GМ16-14/15-104

Ethylene

14

348

1.5

10.4

962

Electric motor

     4GМ40-1.2/250-2500

Ethylene

1.12

260

25.0

250.0

4300

Electric motor

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Details are specified in the Technical Catalog “Reciprocating Compressors“.