Non Return Valve NRV (Check Valve) For Reverse Osmosis Ro System Water Filter. This Valve can also be called as Check Valve, NRV OR Check Valve in any Water Flow System, allows Water in only direction and block the reverse direction to prevent back pressure in the System. This valve can be used with any water filter Purifiers Suited for common RO water filter Purifiers available in India, Compatible with many RO Brands and Models-Can be used in multiple water purifier Models-Counter Top, Desk Top. Stand Mounted, Wall Hanging, Under Sink, most of the RO Model cabinets. This Valve allows water flow only in Single Direction and block the Reverse Direction. This NRV Straight Type Valve is for use on the pure water outlet port of the RO membrane housing and has a check valve/Non Return Valve to avoid water flowing back through it. Suitable for most of the reverse osmosis water system - Type Quick Connect Fittings, Size Suitable for 1/4" inch Tube.
Non-return valves [NRV] work by allowing media to flow through them in only one direction. Diaphragm NRVs use a flexing rubber diaphragm to create a normally-closed valve. Pressure on the upstream side must be greater than the pressure on the downstream side (pressure differential) for the NRV to open and allow flow.