Hyloc is the oldest company of the Polyhydron group of Companies.
Hyloc is a trusted brand in high quality tube couplings, adaptors and flanges. Hyloc also manufacturers high pressure shut-off valves, and needle valves.
We are among the few companies that has complete control over its manufacturing processes – from forgings to surface coatings everything is done in-house with state-of-the art equipment and technology.
Hyloc has successfully employed quality management systems ISO 9001, environment systems ISO 14001 and Occupational safety systems OSHA 18001.

Hyloc is the oldest company of the Polyhydron group of Companies.
Hyloc is a trusted brand in high quality tube couplings, adaptors and flanges. Hyloc also manufacturers high pressure shut-off valves, and needle valves.
We are among the few companies that has complete control over its manufacturing processes – from forgings to surface coatings everything is done in-house with state-of-the art equipment and technology.
Hyloc has successfully employed quality management systems ISO 9001, environment systems ISO 14001 and Occupational safety systems OSHA 18001.