Control Hardware
Handling, processing, or mixing Nitrox or pure oxygen requires special equipment which is BOTH oxygen-compatible and oxygen-clean. Most such equipment will be made from brass or stainless steel with softgoods of 02-compatible polymers like Teflon or Kel-F. Many devices suitable for air cannot be used safely in high O2-environments. GMC offers a good selection of hardware for oxygen-related applications. Each item is delivered oxy-clean.
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All Stainless construction with Teflon & Viton inner seals and a specials lubicant; offered in three different 1/4" NPT threading configurations. 5000 psi service.
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Metering Valves and Orifices -Transfer of oxygen for safe mixing requires low charging rates (50 - 70 psi / minute) into dive tanks. This can be difficult to achieve with normal tank or line valves which are really high flow devices. GMC offers two types of special valves that can meter 02 and other "clean gases": Precision Metering Valves and Gas Flow Controllers. Metering valves have needle-like stems and seats which provide a wide range of flow with precise, but adjustable, metering. However, these valves are sensitive to rough
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Oxygen BIeeders and Vent-Drains - Like air, oxygen lines must occasionally be drained or purged; oxygen-clean and compatible hardware should be used for this purpose. GMC products have all-stainless bodies, 1/4" NPT ports, and replaceable Teflon seats.
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Nitrox / Oxygen Manifold Blocks Creating diving mixtures from raw gases often requires a mixing vessel, or plenum, which can be the tank itself augmented with a manifold to interconnect various system components. Oxy-clean versions of our air manifolds (#45386/45384) work well for this purpose. GMC offers a long block and a compact style with multiple 1/4” NPTF ports and associated mounting brackets.
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Breathing Gas Quick-Couplers - Quick disconnects are very popular for rapid switching of supply hoses during gas mixing operations and for various TEK diving applications. GMC offers a special, hi-pressure brass coupler capable of 5,000 psi service. Straight-through (no check valve) configuration with 1/4" NPT ports. Suitable for mixed gas applications, including pure oxygen. Has only one simple Viton, O-ring seal (Replacement: Order #49110OX). All couplers and mating studs are delivered oxy-clean.
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Oxygen Pressure Hose - It is UNSAFE to use standard thermoplastic air hoses for pure oxygen / oxy-rich mixtures! Teflon-core hoses with stainless steel braid reinforcement and brass end fittings should be utilized for such gases. Our hoses have a 3,000 psi working pressure with a 12,000 psi burst. End fittings are female 1/4” NPT. Oxygen High Pressure Hose - With a thicker Teflon-core and an extra stainless steel overbraid, GMC hi-pressure oxygen / mixed hose is related for 4,500 psi service. Female #4 JIC fittings on each end, except as noted.
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