Ozone NRV Non-Return Valve
SS316L ozone-rated non-return valve preventing water backflow into ozone generator
OZ India Ozone NRV Non-Return Valve in SS316L or PVDF — prevents water backflow into ozone generator, a critical safety component. 0.5 to 4 inch sizes. CE certified. Ozone India Technology, Greater Noida.
CE & ISO 9001:2015 certified manufacturer · Est. 2014 · 150,000+ installations · Greater Noida, India
The OZ India Ozone NRV (Non-Return Valve) is a critical safety component in every ozone water treatment system. It prevents water from flowing back into the ozone generator when the system is shut down or depressurised — protecting the generator electrodes from water damage. Available in SS316L and PVDF for full ozone service compatibility. Must be installed on the ozone outlet of every generator before the venturi injector.
| Material | SS316L or PVDF |
|---|---|
| Available Sizes | 0.5 inch to 4 inch |
| Pressure Rating | Up to 16 bar |
| Connection | NPT / BSP threaded or flanged |
| Cracking Pressure | 0.05–0.1 bar |
| Ozone Resistance | Full ozone service rated |
| Certification | CE, ISO 9001:2015 |
- Critical safety component — protects ozone generator from water damage
- SS316L or PVDF — both fully ozone resistant
- Low cracking pressure — minimal system pressure loss
- Must-have on every ozone generator installation
- All sizes 0.5 to 4 inch available
- CE certified — export ready
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Frequently Asked Questions
Ozone-compatible materials include PVDF (polyvinylidene fluoride), PTFE, 316L stainless steel, titanium, and silicone. Ozone attacks and degrades: PVC, natural rubber, neoprene, most plastics and elastomers, and copper (at concentrations above 0.3 mg/L). All Ozone India Technology accessories use PVDF or SS316L construction.
A venturi injector creates a low-pressure zone as water flows through the narrowed throat, drawing ozone gas into the water stream by the Venturi effect. The resulting micro-bubbles dissolve at 85–95% efficiency. The water must be at sufficient pressure (1–3 bar) and flow (matched to the injector's rated flow range) for effective ozone transfer.
Yes. All fittings used with PVDF ozone pipe must also be ozone-compatible — PVDF compression fittings or 316L stainless steel fittings are used. Standard PVC fittings must not be used with ozone pipework. All Ozone India Technology PVDF pipe and fittings are pre-certified for ozone compatibility.
Ozone India Technology static mixers are sized to match the ozone generator's sidestream or main water flow and are available for flow ranges from 0.5 m³/hr (50 mm pipe) to 100 m³/hr (200 mm pipe). Static mixers achieve >95% ozone dissolution efficiency when sized correctly for the water flow rate.
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OZ NRV Valve