Micro-resistance ball type check valves's disc is a ball coated with rubber and dependant on the line pressure the ball can roll in the chute in the body to open or close the valves without any noise and water-hammering and with good sealing capability.The flow rate is much with little resisting force and little pressure loss.It can be installed vertically or horizontally and widely used at the outlet of pump in cold water's,hot water's,industry's and sewage's pipeline system.
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