the working principle of micro resistance slow close check valve depend on entrance to medium speed and pressure head, the disc automatically open, the media pass. The pressure in the body of water through the micro valve cavity after flowing into the piston assembly, will be the introduction of a piston piston chamber. When water flow stops, Sudden stop or pump operation) When, due to the weight of the disc and the influence of water flow, the disc automatically shut down. But because the piston in the top position, the disc is pressed, the disc can't shut down all of the valve opening, the remaining 20% of the water flow through the opening, which reduces the water hammer pressure. When the disc is pressed at the end of the piston, due to the effect of reaction, the water in the piston cavity after stop piston, valve closed. At this point, the valve can only be closed by a micro control valve slowly return to isolation device, the valve will shut off slowly. Disc points fast shut and slow step or two, to prevent reversals, weaken the water hammer. The length of the piston to extend the period of decided to the opening of the disc. If slowing up, small water hammer, closing time will be extended; Otherwise, if small, can produce destructive water hammer. The product structure adopts delayed the opening of the closed regulator, the control piston extended length by tie rods. Pipe length determines the water hammer peak period. In order to satisfy the various systems of slow closing time requirements, design a micro control valve, according to the time of arrival of the peak water hammer, precise control piston cavity after the compression of water flow, the control valve disc slowly closing time. Closing time can be adjusted arbitrarily from 0 seconds to 60 seconds. The performance characteristics of the micro resistance slow close check valve micro resistance slow close check valve with the disc light, big opening, energy-saving effect is remarkable, small fluid resistance, water hammer eliminate institutional design, stable and reliable sealing performance, wear resistance, long service life, stable running, no vibration, no noise, etc.

resilient gate valve wedge gate valve is generally used to os & y valve fire protection.
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Getting flanged gate valve from an idea to production is a complex process. It involves significant research, time, planning and patience. But with the right information, the right resources and the right product, it's possible.
Many of the gate valve listed here can be purchased for less money, but in general we recommend paying a slightly higher price for significantly improved performance. These are our top choices and their recommended configurations.