Regulators, valves and cylinder connectors for hydrogen service

Our range of hydrogen regulators, valves and gas equipment provides safe and reliable control of hydrogen in industrial, laboratory and high purity gas systems. Every product on this page is listed for hydrogen service, including cylinder and line regulators, cylinder and line valves, gas filters, laboratory gas outlets, high pressure hoses and hydrogen cylinder connectors. The range covers industrial gas supply, the laboratory bench and high purity and ultra-high purity gas lines, from a single cylinder regulator to multi-cylinder manifolds and automatic changeover systems.

Choosing the right equipment starts with the cylinder connection. In the UK, hydrogen cylinders have a BS 341 No. 4 outlet with a left-hand thread, so the No. 3 connector (right-hand thread) used on oxygen and inert gas cylinders cannot be fitted. Cylinders made to American or German standards use CGA 350 or DIN 477 No. 1 connections, which are also left-hand thread.

Next, consider the pressure control needed. A single stage regulator suits applications where some variation in delivery pressure is acceptable. A dual stage or balanced valve regulator holds a steady outlet pressure as the cylinder empties or the inlet pressure changes. Where hydrogen is needed continuously over long periods, an automatic changeover manifold lets empty cylinders be replaced without interrupting the gas supply. For high purity and ultra-high purity hydrogen lines, use the Rotarex RX Series UHP regulators and D Series valves instead of the industrial range.

Because hydrogen molecules are so small, every joint in the system is a potential leak path. Keeping joints to a minimum, choosing the correct seat and seal materials, and leak testing the system with an inert gas before hydrogen goes in all help keep the gas system safe and leak-free.