ZHEJIANG DOUBLE-LIN VALVES CO.,LTD.
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4 Inch Female HPB 57-3 Brass Spring Check Valves
Working Pressure 16bar (232 psi)
Working Temperature from -10 ℃ to +120 ℃ (from 14℉ to 248℉)
Thread ISO228 (equivalent to DIN 259 and BS2779)
Brass Valve Body: High-density forging, no blister, no air holes, no leakage. Made by special high precision CNC machines.
Brass Bonnet: High-density forging, no blister, no air holes, no leakage. Made by special high precision CNC machines.
Brass Valve Spool: High-density forging, no blister, no air holes, no leakage. Made by special high precision CNC machines.
Rubber Washer: Made of imported raw material, long service life and not easy to leak.
Spring: Made of imported raw material, stable performance, good sealing, and not easy to leak.