Product model: HH47X / HH48X / HH49X
Product name: Micro-resistance slow-closing butterfly type muffler check valve Micro-resistance slow-closing butterfly type check valve Safe use of the system. The micro-resistance slow-closing butterfly check valve has the advantages of simple structure, small size, reliable performance and wear resistance. It requires the use of ductile cast iron, which is economical in price and long in service life.
The micro-resistance slow-closing butterfly check valve is mainly composed of a valve body, two semi-circular discs, a return spring, an oil storage cylinder, a slow-closing small cylinder, and a needle valve (micro-regulating valve). The use of nodular cast iron material is not only suitable for large diameter, but also wear-resistant and pressure-resistant. It is widely used in water supply and drainage, construction industry and water industry. Taichen micro-resistance slow-closing butterfly check valve with a diameter below DN600 is available from stock. Professional manufacturing is one of the more cost-effective products in the industry.
Second, the working principle of the micro-resistance slow-closing butterfly check valve:
The micro-resistance slow-closing butterfly check valve belongs to the category of automatic valves. It pushes the valve plate away by the thrust of the medium, and enters the lower part of the piston in the oil storage cylinder through the pressure medium. The tail end of the side small oil cylinder makes the piston rod in the small cylinder extend, and the medium pressure is automatically closed when the pressure drops. Because the piston rod is in the extended position, it cannot be fully closed against the valve flap, and about 20% of the remaining area allows the medium to pass through, thereby eliminating the water hammer. The pressure in the back cavity of the piston slowly enters the oil storage cylinder through a needle valve, and the valve flap gradually closes. The valve disc is divided into two steps: fast and slow, and then closed slowly, which can prevent the motor from reversing and also play the role of silencer.
Third, the main technical parameters:
Parameters of micro-resistance slow-closing butterfly check valve:
Working temperature: -10-90 ℃ (can do 260 ℃);
Main material: cast iron, ductile iron, cast steel;
Nominal diameter: DN50-1500mm
Slow closing range: 3 seconds to 60 seconds;
Flange standard [GB / T 17241.6 GB / T 9113]
Test standard [GB / T 13927 AP1598]
Material of main parts:
|Part Name||Valve body||Butterfly||Sealing ring||Valve stem||filler|
|material||Gray cast iron, carbon steel||Gray cast iron, carbon steel, ductile iron||Neoprene, nitrile oil resistant rubber||stainless steel||Polytetrachloroethylene|
|The way to||200||250||300||350||400||450||500||600||700||800||900||1000||1200||1400|
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