About Knox Western

Knox Western is a U.S.-based engineering company specializing in the design and manufacture of lubricated and non-lubricated reciprocating gas compressors for a wide range of applications, primarily across the energy and mobility industries.Founded in the early 1930s, Knox Western began its journey in compressor repair and modernization. Over the decades, it evolved into a leading distributor for major global manufacturers before taking a defining step forward in 1973, becoming an OEM with the development of its proprietary TP Series compressors.Building on decades of hands-on engineering expertise, Knox Western further expanded its capabilities in 2000 with the design and construction of its first CNG refueling station, marking a significant milestone in its contribution to clean and efficient mobility solutions.
Today, Knox Western designs and manufactures all its equipment at its headquarters in Erie, Pennsylvania, delivering high-quality, high-reliability compressor systems to customers in over 70 countries worldwide. Backed by advanced technology, an experienced engineering team, and a strong global network of representatives, Knox Western is trusted for both standard and custom-engineered solutions with a proven reputation in demanding industrial environments.
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92 Years as a Compressor Solutions Provider

1930

Repairs & Upgrades to All OEMs

Earl E Knox Company founded
to fill demand for quality compressor rebuilds in the US

1960

Major OEM Distributor

Becomes Top OEM Distributor for major US OEMs including Chicago Pneumatic, Joy, and Quincy.

1973

Major OEM Distributor

Knox Western Group formed as a gas compressor OEM with the internal development of the "TP" Splash-Lube Compressor line.

1992

OEM

OEM Product Line expanded to include Pressure-Lube "Eagle" Series gas compressors.

1999

OEM

Introduction of "Lube-Free" Compression Technology.

2019

OEM

Designed the first complete Hydrogen package for a refueling station in California.

2024

Acquisition

Knox Western was acquired by the Didwania Group in 2024.

1930

Repairs & Upgrades to All OEMs

Earl E Knox Company founded
to fill demand for quality compressor rebuilds in the US

1960

Major OEM Distributor

Becomes Top OEM Distributor for major US OEMs including Chicago Pneumatic, Joy, and Quincy.

1973

Major OEM Distributor

Knox Western Group formed as a gas compressor OEM with the internal development of the "TP" Splash-Lube Compressor line.

1992

OEM

OEM Product Line expanded to include Pressure-Lube "Eagle" Series gas compressors.

1999

OEM

Introduction of "Lube-Free" Compression Technology.

2019

OEM

Designed the first complete Hydrogen package for a refueling station in California.

2024

Acquisition

Knox Western was acquired by the Didwania Group in 2024.

TRUSTED BY CUSTOMERS GLOBALLY

3500+ Global Compressor Installations

Contact us now