Structural features and main parameters of the slow-closing check valve

I. Overview of the slow-closing check valve The slow-closing check valve is an intelligent valve installed in the water supply outlet of the high-rise building water supply system and other water supply systems to prevent backflow, water hammer and water hammer. The valve has three functions of electric valve, check valve and water hammer eliminator, which can effectively improve the safety and reliability of the water supply system, and integrate the technical principles of slow opening, quick closing and slow closing to eliminate water hammer. The pump water hammer and the pump water hammer are generated. Just operate the pump motor on/off button, the valve can automatically open and close according to the pump operation rules, the flow is large, and the pressure loss is small.

Second, the slow-closing check valve structure features and uses The slow-closing check valve consists of a main valve, check valve, needle valve, ball valve, micro-filter and pressure gauge to form a hydraulic control take-over system. With automatic hydraulic operation, the main valve can be optimally opened or closed. Prevent the occurrence of water hammer and water hammer to achieve the effect of slow closing and noise reduction. The 300X slow-closing check valve uses hydraulic self-power control, does not require other devices and energy, is easy to maintain, and is stable and stable. 300X slow-closing check valve products are widely used in high-rise buildings, living areas and other water supply pipe network systems and urban water supply projects.

Third, the working principle of the slow-closing check valve When the valve feeds water from the inlet end, the water enters the main valve control room through the micro-filter, needle valve, check valve, and then drains to the downstream through the ball valve. Since the needle valve opening degree is smaller than the ball valve opening degree, that is, the drainage speed of the main valve control chamber is greater than the water inlet speed, the control chamber pressure is lowered, 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 starts to flow back, a part of the return water enters the main control room through the ball valve. Due to the check valve action, the return water cannot flow out from the main control room, causing the main control room to gradually increase pressure and slowly close the main valve. .

Fourth, the main technical parameters of the slow-closing check valve: