TIS Hydraulics is the UK master distributor of the Hy-Lok Corporation, an international manufacturer and supplier of instrumentation valves and fittings.

TIS Hydraulics is proud to offer access to the highest quality valves and fittings for every project and specification.

As a global company with operations in the North America, Europe, Africa, and Asia, Hy-Lok is an expert in manufacturing and providing all kinds of instrumentation fittings, valves, controls, and hoses. Hy-Lok has decades of experience serving the needs of a wide variety of manufacturers across a range of industries.

Hy-Lok UK as the UK branch of a global corporation, is just as versatile, serving a number of industries such as chemical processing, cryogenics, alternative fuels, power generation, pharmaceutical and biotechnology, analytical instrumentation, semiconductor manufacturing, life support, oil and gas refining, aerospace, defense, research labs, pulp and paper, and rigs, platforms, and shipbuilding.

Hy-Lok UK is more than just a distributor. Our capabilities allow us fully partner with a manufacturer and offer solutions for every requirement and specification for every project. Our business is built around our commitment to customer service and long-lasting business relationships. We are an ISO 9001 certified company, and as a result, we are able to offer the most competitive and economical prices without sacrificing our commitment to either our customers or the quality of our products.

For much more on Hy-Lok UK's capabilities in various markets, click on any of the industries below. If you have any questions or would like additional information, feel free to find a Hy-Lok distributor in your area.

Markets Served

Aerospace & Defense


At Hy-Lok UK, we provide customers in the aerospace and defense industries with a wide range of fittings and valves, designed to meet the most stringent requirements. The aerospace and defense industry involves a number of critical areas such as aircraft,…

Alternative Fuels


Hy-Lok UK, carries a full line of alternative fuel fittings and components that are designed to be compatible with CNG, LNG, and hydrogen fuel cell technology. Our 316 stainless steel tube fittings, ball valves, check valves, relief valves, filters, tee filters,…

Analytical Instrumentation


Hy-Lok UK supplies top quality analytical instrumentation fittings, connections and fluid controls at the most economical prices. Our tube fittings, needle valves, ball valves, inline filters, and hoses provide research laboratories and testing facilities with the degree of precision and accuracy…

Chemical Processing


Hy-Lok UK provides a comprehensive selection of chemical processing fittings and fluid controls for the chemical processing and petrochemical processing industries. We manufacture and supply tube fittings, pipe fittings, ball valves, inline filters, check and relief valves, instrument manifolds, calibration fittings,…



Hy-Lok UK supplies premium CRYON trunnion ball valves, needle valves, and tube fittings for use in cryogenic and marine applications including beverage carbonation systems and analytical instrumentation. Valves and fittings are made from brass or stainless steel and fire tested to…

Life Support


Hy-Lok UK is a critical breathing system fittings supplier, providing life support system components to the medical, offshore diving, and other critical support system industries. Our stainless steel fittings are used in pressurized recompression chambers, charging stations, air canisters, breaking air…

Oil & Gas Refining


Hy-Lok UK manufactures oil and gas fittings used extensively in both the upstream exploration and production, and the downstream refining and distribution of oil and natural gas products. Our tube fittings, instrument valves, metal hoses, block valves, bleed valves, instrument manifolds,…

Pharmaceutical & Biotechnology


Hy-Lok UK's line of sanitary pharmaceutical fittings is designed for use in ambient to low pressure gas systems, air systems and analytical instrumentation. We manufacture and supply conversion fittings, tube fittings, ball valves, needle valves, inline filters, check valves, relief valves…

Power Generation


When quality and reliability are essential, customers turn to Hy-Lok UK’s line of power generation fittings for their trusted performance and unsurpassed quality. Our manifolds, union bonnets, tube fittings, check valves, instrument weld fittings, and pipe fittings can be found in…

Pulp & Paper


Hy-Lok UK supplies the pulp and paper industry fittings designed for use in batch or continuous processing, fluid transfer, plant utilities and analytical instrumentation applications. There has been tremendous change in the pulp and paper industry in recent years. As international…

Research Labs


Hy-Lok UK provides ultra-high purity products including tube fittings, valves, and our ZCR face seal components. Our ZCR components are finished to a surface finish of 0.25 µm Ra to ensure reliable performance under the toughest high vacuum or positive pressure…

Rigs, Platforms & Shipbuilding


Hy-Lok UK is the leading supplier of offshore and marine fittings for customers in the drill rig, production platform, and shipbuilding industries. Our reputation for quality and extensive selection of fittings, including those rated up to 10,000 psig, makes us a…

Semiconductor Manufacturing


Semiconductor manufacturing is the process of creating the integrated circuits used in electronic devices and electrical equipment. The process involves four categories of steps including deposition, patterning, removal, and electrical modification. Each of these categories requires a range of valve and…

Additional Resources

Fluid Compatibility Guide

Product Catalogues

Certification Library