The Double Lin Vertical Non-Return Valve (LL5001A) is a durable and efficient brass spring check valve designed to prevent backflow in water supply and pipeline systems. Manufactured from HPb 57-3 high-grade brass, it ensures long service life, excellent corrosion resistance, and reliable flow control.
This valve features female × female threaded connections conforming to ISO228 (equivalent to DIN 259 and BS 2779 standards), making it compatible with a wide range of pipeline systems. The stainless-steel spring and NBR gasket deliver superior sealing, stability, and high performance even under demanding conditions.
Designed to operate at 16 bar (232 PSI) and withstand temperatures from –10°C to +120°C, this vertical-type non-return valve is ideal for residential, commercial, and industrial applications requiring consistent one-way flow and enhanced system protection.










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