RECIPROCATING GAS COMPRESSORS

TWO THROWS UNIT

Eagle 4230 / 4235

The mainstay of Knox Western large compressors for many years. Built in two-throw and four-throw models in both 3” and 4-1/2” strokes. Frame load for this compressor is 20,000 pounds Tension and Compression.

Up to 500 bhp | 1,800 rpm

Number of throws

2

Horsepower

500

RPM (min - max)

1,800

Frame lubrication

-

Stroke

3

Piston speed (fpm)

900

Crankshaft Centerline (inches)

13

Overall length, (max.) (inches)

140

Overall length, (max.) (inches)

45

Approx. weight (frame only) (lbs)

3,000

Rod Loads, (tension) (lbs)

20,000

Rod Loads, (compression) (lbs)

20,000

Rod Loads, (combined) (lbs)

40,000

Oil pump capacity (gpm)

35

Crankcase oil capacity (gal)

-

Oil Pressure (min - max) (psig)

-

Crankpin diameter (in)

5.250

Main bearing diameter (in)

9.05

Piston rod diameter (in)

1.875

Number of throws

2

Horsepower

500

RPM (min - max)

1,200

Frame lubrication

-

Stroke

4.5

Piston speed (fpm)

900

Crankshaft Centerline (inches)

13

Overall length, (max.) (inches)

140

Overall length, (max.) (inches)

45

Approx. weight (frame only) (lbs)

3,000

Rod Loads, (tension) (lbs)

20,000

Rod Loads, (compression) (lbs)

20,000

Rod Loads, (combined) (lbs)

40,000

Oil pump capacity (gpm)

35

Crankcase oil capacity (gal)

-

Oil Pressure (min - max) (psig)

-

Crankpin diameter (in)

5.250

Main bearing diameter (in)

9.05

Piston rod diameter (in)

1.875

Number of throws

2

Horsepower

200

RPM (min - max)

1,200

Frame lubrication

-

Stroke

4.5

Piston speed (fpm)

900

Crankshaft Centerline (inches)

12

Overall length, (max.) (inches)

132

Overall length, (max.) (inches)

40

Approx. weight (frame only) (lbs)

2,500

Rod Loads, (tension) (lbs)

15,000

Rod Loads, (compression) (lbs)

15,000

Rod Loads, (combined) (lbs)

30,000

Oil pump capacity (gpm)

20

Crankcase oil capacity (gal)

-

Oil Pressure (min - max) (psig)

-

Crankpin diameter (in)

4.125

Main bearing diameter (in)

7

Piston rod diameter (in)

1.5

COMPONENT

MATERIAL

Crankcase

Grey iron

Bearing housing

-

Flywheel

-

Crankshaft

Ductile iron

Main bearings

Double row spherical roller

Connecting rods

Ductile iron Class 60/40/18

Wrist pin

-

Wrist pin bearings

-

Crossheads

Ductile iron 60/40/18 babbitt faced

Crossheads guides

Grey iron

Piston rods (rolled threads)

Alloy steel AISI 4140

Cylinders, low pressure

STL / DI

Cylinders, medium pressure

STL / DI

Cylinders, high pressure

STL / DI

Pressure packing

-

Pistons, low pressure

STL / Grey CI / AL

Pistons, medium pressure

STL / Grey CI / AL

Pistons, high pressure

STL / Grey CI / AL

Valve seats and guards

Carbon steel

Valve springs

-

Note specific TFE blend to be determined per application. Our management system of standards is designed and reinforced to assure the quality of all operations and processes. Our continuous improvements apply to both quality and environmental requirements.

The Eagle series is a mid range line of compressors, designed to be coupled with today’s high speed drivers. Rod load ratings to 60,000 pounds combined with MAWP to 7200 PSIG give this series of compressors the flexibility to by applied in a variety of services.

Eagle series frame is available in both 2 and 4 throw configurations and the heavy duty frames are designed with internal and external ribbing. Full pressure lubrication to the frame running gear is accomplished by a crank mounted oil pump. Single piece babbit-faced crossheads have full pressure lubrication top and bottom assuring minimal wear and long life.