Piston check valve 3250.01.NP

for waterDINNPT

Check valves, also known as one-way valves, non-return valves, or single-flow valves allow fluid to flow in the direction of the arrow but do not allow fluid to flow in the opposite direction to that of the arrow. Our non-return valves are piston-operated and ideal for instrumentation. In addition to not allowing the fluid to circulate in the opposite direction, they have a system that prevents the circuit from being unloaded. In other words, the fluid will not circulate in the direction of the arrow if it does not overcome the set pressure of the valve. Normally this pressure is set at 0.5 bar but it can be modified on request. Check valves with free flow in one direction and block in the other to eliminate the effect of backpressure in the pneumatic and hydraulic circuits. Internally these valves are formed by an automatic closing system by spring piston. Pressure Different series depending on the required service pressure, up to 4140 bar. Connections NPT (ANSI B1.20.1), BSP or Cylindrical GAS (ISO 228, DIN 259), SW (ANSI B16.11); BW, SW OD, Flanged, Mixed. Materials Carbon Steel, 316 / 316L Stainless Steel, Brass, Duplex, Super Duplex, Hastelloy, Monel, among others. Closure The piston can make the metal-metal closure (only by high pressure) or with an O-ring. The piston closure can be with compensation spring or free (only in horizontal position). Female threaded connections: NPT ASME B1.20.1 BSPP, Cylindrical Gas, DIN 259, ISO 228/1 SW, ANSI B16.11 Other connections: BW, DIN, flanges and double ring compression fittings. Standard body: F 316 / 316L 1.4404, ST 52.3 1.0570, BRASS 1.7660, Special Alloy.