TWO THROWS UNIT

Eagle 4000 Series

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.

Frame Specifications
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 width, (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 width, (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
Materials
COMPONENT MATERIAL
CrankcaseGrey iron
Bearing housing-
Flywheel-
CrankshaftDuctile iron
Main bearingsDouble row spherical roller
Connecting rodsDuctile iron Class 60/40/18
Wrist pin-
Wrist pin bearings-
CrossheadsDuctile iron 60/40/18 babbitt faced
Crossheads guidesGrey iron
Piston rods (rolled threads)Alloy steel AISI 4140
Cylinders, low pressureSTL / DI
Cylinders, medium pressureSTL / DI
Cylinders, high pressureSTL / DI
Pressure packing-
Pistons, low pressureSTL / Grey CI / AL
Pistons, medium pressureSTL / Grey CI / AL
Pistons, high pressureSTL / Grey CI / AL
Valve seats and guardsCarbon 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.

Eagle Series Compressors

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.