Features: factory production DH44X / H micro Slow Close Check Valve is mainly used for industrial, urban water supply and drainage, and high-rise residential, luxury hotels, pressure at the outlet of the pump output. Designed to take full consideration of environmental requirements, the use of oblique plate structure, to no vibration, no noise, smooth operation, ensure that hotels, residential quiet, and energy-saving effect. By delaying the close of the way back into the system so that the local discharge, thus greatly reducing the water pressure to stop the pump back momentum, eliminating destructive water hammer peak production, closure sealed with in nitrile rubber, good sealing performance, damping resistance grinding, long life, easy maintenance and so on.