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Check Valve G1/4 UNDERSEA 5100 330 bar
€67.30 tax incl.
( 56,08 € tax excl. )
Availability:
In stock
Reference:
90736
G1/4 BSP male threads on both ends for direct inline fitting between female-ported components.
✓ G1/4 male × male · 330 bar max · O2-clean brass · 0.6 bar cracking pressure
Factory O2-cleaned for immediate use with oxygen, nitrox, and trimix. Service kit 5100-SK available separately.
UNDERSEA Ltd has supplied the professional diving industry from Verwood, Dorset (UK) since 1970, and the 5100 non-return valve sits at the core of their high-pressure gas fittings range. Machined in brass with G 1/4 BSP coned male threads on both inlet and outlet, it installs inline wherever backflow protection is required in a fixed gas management system: at compressor outlet ports, along fill manifold headers, or in cascade storage connections. The 0.6 bar cracking pressure ensures immediate opening with a negligible pressure drop, while the factory O2 cleaning makes it ready for oxygen, nitrox and trimix service straight from the packaging — no additional preparation required.
Technical specifications
- Manufacturer reference: 5100
- Type: high-pressure non-return valve (NRV / check valve)
- Inlet thread: G 1/4 BSP coned male
- Outlet thread: G 1/4 BSP coned male
- Maximum working pressure: 330 bar
- Cracking pressure: 0.6 bar
- Body: brass
- Seals: oxygen-compatible — factory O2-cleaned before dispatch
- Weight: 200 g · Dimensions: 10 × 5 × 5 cm
- Service kit available separately: ref. 5100-SK (O-rings + spring + seat)
- Manufacturer: UNDERSEA Ltd., Verwood, Dorset, UK
- Use: fixed installations only — not suitable for portable or mobile assemblies
Applications
Key advantages
- G1/4 male × male BSP: direct inline fit between female-ported manifold components, no adapters needed
- Factory O2-cleaned: approved for immediate use with oxygen, nitrox and trimix without further preparation
- 330 bar rated: covers all dive cylinder standards and high-pressure cascade storage systems
- 0.6 bar cracking pressure: near-instant opening, virtually zero flow restriction under normal fill conditions
- Brass construction: corrosion-resistant in humid fill-room environments, proven durability over decades of professional use
- Serviceable design: 5100-SK kit (O-rings, spring, seat) enables targeted maintenance without replacing the complete valve
Standards and manufacturer support
Technical documentation
90736
Specific References
- Manufacturer reference
- 5100
G1/4 BSP male threads on both ends for direct inline fitting between female-ported components.
✓ G1/4 male × male · 330 bar max · O2-clean brass · 0.6 bar cracking pressure
Factory O2-cleaned for immediate use with oxygen, nitrox, and trimix. Service kit 5100-SK available separately.
