Reciprocating Gas Compressors and Components Knox Western

Reciprocating gas compressors Knox Western: selection of TP and Eagle frames, high-pressure cylinders, piston rods, valves, and packings.

Reciprocating gas compressor frames Knox Western TP Series

Reciprocating compressor frames of the Knox Western TP Series are engineered for light to medium duty gas compression applications. The rigid frame housing of Class 40 grey iron incorporates a balanced running gear with splash lubrication for reliable round-the-clock service.

One-piece frame housings made of Class 40 grey iron engineered to minimize torsional strain
Ductile iron crankshafts Class 80/55/06 with precision journal grinding and surface hardening
Combined piston rod load capacity up to 18000 lbs operating at speeds up to 1800 RPM
Double row spherical roller bearings with heavy-duty internal clearances for industrial duty

Heavy-duty reciprocating compressors Knox Western Eagle Series

Knox Western Eagle Series reciprocating compressor frames represent the heavy-duty product line with ratings up to 1800 hp featuring full pressure lubrication. Units deliver continuous non-stop operation compliant with API 618 standards at discharge pressures reaching 500 bar.

Full pressure lubrication circuit driven by an integrated gear pump delivering 8 gpm
Crosshead guide tracks made of ductile iron featuring anti-friction babbitt lining
Forged steel connecting rods fitted with high-precision bronze wrist pin bushings
Balanced opposed two-throw and four-throw layouts designed for multi-stage gas duty

Hydrogen and CNG gas compressor packages by Knox Western

Modular compressor packages by Knox Western serve compressed natural gas CNG refueling facilities and high-purity hydrogen mobility stations. The machinery prevents fluid contamination and delivers gas streams at pressures reaching 7250 psi across diverse climates.

Lube-free cylinder designs with advanced polymer rings for clean hydrogen compression
Multi-stage inter-cooling gas exchangers with high-efficiency condensate drop knockouts
Purged distance pieces with nitrogen barrier blankets to isolate combustible gas flows
Explosion-proof instrumentation and automated shutdown logic ensuring plant safety

Suction and discharge compressor valves for Knox Western units

Automatic gas valves for Knox Western compressors are fabricated to operate reliably under severe pulsating flows of process gases. Carbon steel seats and lift guards are matched with heavy-duty springs made of chrome vanadium and stainless alloy materials.

Carbon steel valve seats with precision ground and lapped sealing contact surfaces
Spring steel valve plates engineered for maximum endurance under cyclic shock loads
Stainless and chrome vanadium helical springs resisting fatigue and thermal relaxation
Pneumatic suction valve unloader assemblies for efficient capacity stepless control

High-pressure cylinders, pistons and rod packings for Knox Western

Cylinders and pistons for Knox Western compressors handle extreme differential pressures in demanding plant environments. Medium-pressure cylinders utilize Class 60/40/18 ductile iron, while high-pressure barrels are machined from forged steel with micro-honed bores.

Forged alloy steel high-pressure cylinders subjected to full volumetric ultrasonic testing
Piston rods made of AISI 4140 alloy steel with 1.125 inch diameter and rolled thread roots
Low-pressure pistons formed from lightweight SAE 355 aluminum alloy to cut inertia forces
Full-floating non-metallic rod pressure packing assemblies with vented purge rings

Crankshaft running gear and crosshead assemblies by Knox Western

Crankshaft running gear components by Knox Western convert rotary drive torque into smooth reciprocating motion without parasitic vibration. Crosshead bodies of Class 60/40/18 ductile iron withstand intense alternating mechanical stresses during continuous service.

Crossheads made of Class 60/40/18 ductile iron with symmetrical guide shoe profiles
Wrist pins machined from alloy steel AISI 8602 with carburized and polished journals
Replaceable crankpin bearing shells featuring multi-layer anti-friction aluminum lining
Precision dynamic balance counterweights configured to neutralize first-order inertia forces

Kinematics of balanced running gear in Knox Western TP Series gas compressors

In process compressors of the Knox Western TP Series, drive torque transmission into reciprocating piston motion relies on a rigid running gear built around a crankshaft of high-ductility iron Class 80/55/06.

Precision induction heat treatment of bearing journals delivers surface hardness and fatigue resistance under cyclic bending stress. Double row spherical roller main bearings accommodate angular shaft deflection under pulsating gas forces.

Forged alloy steel connecting rods are equipped with bronze wrist pin bushings of alloy AISI 8602, ensuring low friction coefficients during splash lubrication.

Full pressure lubrication system architecture of Knox Western Eagle Series frames

Heavy-duty Knox Western Eagle Series compressor frames feature an integrated full-pressure lubrication loop engineered in conformance with API 618 design requirements.

An internal gear pump rated at 8 gpm draws oil from an expanded sump, routing the fluid through full-flow filtration elements and a plate-fin oil cooler to the main journals.

Pressurized oil flowing at 35 to 60 psig passes through drilled crankshaft galleys into connecting rod bearings and wrist pin journals. Electro-mechanical pressure monitoring switches trigger automated machine trips should oil header pressure drop below minimum thresholds.

Design considerations for oil-free hydrogen and clean gas compression cylinders

For dry high-purity hydrogen and clean pipeline natural gas applications, Knox Western delivers oil-free compression systems that protect process fluids from oil contamination. Light-weight pistons machined from SAE 355 aluminum alloy reduce reciprocating inertia.

Piston rings and rider bands are machined from self-lubricating fluoropolymer compounds with engineered filler blends to support non-lubricated sliding.

Extended two-compartment distance pieces feature continuous dry nitrogen purging to establish a positive pressure barrier between the crank housing and the cylinder bore.

High-pressure automatic gas valve overhaul, seating integrity and dynamic response

Gas distribution efficiency throughout Knox Western compressor stages depends on profile geometry and seating dynamics of concentric ring valves. Valve seats of fine carbon steel are finished through optical lapping to achieve mirror flatness.

Valve plates stamped from alloy spring steel oscillate against curved lift arrestor channels.

Stacks of helical springs manufactured from stainless steel and chrome vanadium alloy provide rapid closure timing when piston velocity approaches dead center, suppressing gas backflow and optimizing volumetric delivery.

Full-floating non-metallic rod packing assembly procedures and running clearances

Sealing of the 1.125-inch diameter AISI 4140 alloy steel piston rod within Knox Western cylinders utilizes multi-cup full-floating pressure packing assemblies. Packing housings are liquid-cooled to conduct frictional heat away from non-metallic sealing rings.

Each packing cup houses segmented seal rings held against the reciprocating rod by stainless garter springs. The mechanical assembly accommodates normal thermal rod growth and slight deflection without edge biting.

An internal vent passage routes fugitive gas slip directly to flare headers or compressor suction lines.

Crosshead shoe alignment protocols and babbitt bearing liner reconditioning

Crosshead assemblies on Knox Western Eagle Series frames carry significant normal thrust forces generated as connecting rods articulate relative to cylinder centerlines. The crosshead body is machined from ductile iron Class 60/40/18 with precision guide shoes lined with heavy babbitt metal.

Preventative maintenance routines include ultrasonic inspection of babbitt bond integrity and feeler gauge verification of running clearances within the guide track.

When wear reaches maximum allowable limits, precision alignment shims restore exact concentricity between the piston rod and cylinder centerline.

Knox Western and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Knox Western and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.