Slow-Closing Check Valve

300X slow-closing check valve consists of main valve, one-way valve, needle valve, ball valve, micro-filter and pressure gauge. The optimal opening or closing speed of the main valve can be obtained by hydraulic automatic operation. Prevent the water hammer of water clocks, so as to achieve the effect of slowly closing and silencing.
This product uses hydraulic self-control, does not need other devices and energy, easy maintenance, open and close smoothly.
This series of valve products are widely used in high-rise buildings, living areas and other water supply network systems and urban water supply projects.
Working principle
When the valve feeds water from the inlet end, water enters the main valve control room through micro filter, needle valve and one-way valve, and then drains down through the ball valve. Because the needle valve opening is smaller than the ball valve opening, that is, the drainage speed of the main valve control room is greater than the water inlet speed, so the pressure of the control room is reduced, and the inlet pressure acting on the lower end of the main valve disc opens the main valve to supply water downstream.
When the pipeline stops supplying water, if the downstream water begins to flow back, part of the backflow water enters the main control room through the ball valve. Because of the function of one-way valve, the backflow water cannot flow out from the main control room, which causes the main control room to gradually increase pressure and slowly close the main valve.
Main technical parametersMajor Parts MaterialsPart List
1. Needle valve 2, main valve 3, ball valve 4, pressure gauge 5, one-way valve
Main Shape Connection Dimensionsinstallation diagram