About Me : DESCRIPTION A screw-in, cartridge-style, hydraulic check valve for use as a blocking or load-holding device. OPERATION DACV42-M20 allows flow passage from 鈶?to 鈶★紝while normally blocking oil flow in the opposite direction. The cartridge has a fully guided check which is spring-biased closed until sufficient pressure is applied at 鈶?to open to 鈶?. FEATURES Hardened seat for long life and low leakage. Optional bias springs for back-pressure application flexibility. Conforms to ISO 7789 cavity. MATERIALS Cartridge: Weight:0.43 kg 锛?.95 lbs锛夛紱 Steel with hardened work surfaces. Zinc-plated exposed surfaces. Buna N O-rings and back-up standard. Standard Ported Body:Weight: 1.63kg锛?.60 lbs锛夛紱 Anodized highstrength 6061 T6 aluminum alloy, rated to 240 bar锛?500 psi锛夛紱 Ductile iron bodies available; dimensions may differ. Advantage HIGH ACCURACY On-off characteristic can reach 95锛?of opening rate and 95锛?of the closing rate. HIGH STABILITY Working pressure wobble will be less than 卤0.1MPa. HIGH DURABILITY Designed service life can reach more than 1 million times.Customized Check Valves website:http://www.dahydraulics-valves.com/hydraulic-cartridge-valve/check-valves/