Technical performance characteristics of 300X slow-closed check valve

1. The hydraulically controlled slow-closing check valve has obtained the utility model patent certificate, the patent number is ZL200720194696.1.

2. Butterfly slow-closing check valve is used in water supply and drainage pressurized pump set and pipeline network, which can eliminate water hammer and protect the safety of pump set and pipeline.

3. The butterfly slow-closing check valve runs smoothly, without vibration and noise.

4. The butterfly slow-closing check valve is a double-off butterfly check valve, which is opened by the pressure when the medium flows downstream to overcome the torsional moment of the spring, and is closed by the resistance moment generated by the torsion spring, and then depends on the countercurrent flow of the medium. The pressure-generated seal is greater than the pressure to achieve the seal.

5. Through the pistons on both sides of the valve body and the oil pressure system of the control piston, the slow closing and mute effect is achieved, and the noise is small.

6. The slow closing system has good performance, and the valve plate has low opening resistance. There is a needle valve in the oil pipeline of the slow closing system, and the oil flow in the oil pipe can be adjusted through the needle valve, so as to achieve the purpose of adjusting the slow closing time, and the adjustment range is large.

The valve body is made of ductile iron precision casting, all castings are treated with aging, fine texture, uniform structure, no casting defects such as cracks, shrinkage holes, shrinkage, porosity and insufficient pouring; the castings are clean, the shape is correct, and all shapes and sizes are changed. There are larger arc transitions and cast fillets.

7. The butterfly plate is made of carbon steel covered with J nitrile rubber, which is firmly connected, the sealing surface is not affected by fluid, has strong wear resistance and corrosion resistance, and has good sealing performance.

8. All equipment is absolutely interchangeable whether as a whole or its related parts.

How 300X slow-closed check valve

When the medium flows through the valve in a positive direction, the butterfly plate is opened due to the pressure of the medium itself, the pressure water in the pipeline compresses the oil in the spherical rubber oil pool through the small hole in the valve body, and the oil passes through the oil pipe through the oil cylinder to push the piston out At the same time, because the butterfly plate is subjected to the double reaction force of the torsion spring and the piston assembly, the opening of the butterfly plate is relatively slow.

When the medium flows in the reverse direction, the weight of the disc itself, the elastic force of the torsion spring and the force of the countercurrent medium make the disc move in the closing direction. When the disc moves to the piston (about 80% closed), due to the hydraulic action of the plug assembly, the rapid closing of the disc is prevented, the oil in the cylinder is adjusted through the oil pipe and the needle valve, and then returns to the oil pool, The butterfly plate is slowly closed until it is completely consistent with the sealing surface. In this process, the slow closing and noise reduction function of the check valve is realized, and the backflow of the medium is effectively prevented at the same time. By adjusting the needle valve, the butterfly plate can be changed. The length of the slow closing time.

300X slow-closed check valve installation

1. Before installing the equipment, check the hydraulic slow-closing device, adjust the twist nut, check whether the adjusting screw is flexible before and after, and require no jamming phenomenon, check whether the one-way needle valve, breathing tube and other components are abnormal and whether they are complete or not. .

2. The equipment should be installed in accordance with the direction of the water flow of the arrow marked on the valve body, and cannot be installed in reverse.

3. When installing the balance rod, it needs to be installed in the direction shown in the figure. After installation, it is used to move the balance rod to check whether the valve plate rotates freely, and there is no jamming phenomenon.

4. This valve can be used for vertical pipeline installation. When using it, remove the balance rod, change it to an angle, and keep the balance weight above the horizontal centerline.

5. The valve can be installed in the trench or on the ground. If it is used on the ground, a protective railing or protective cover should be installed at the position of the heavy hammer to ensure safety.

Maintenance of 300X slow-closed check valve

1.Every six months of operation or more than one month of deactivation, it is necessary to comprehensively check whether all moving parts or pipelines are normal, including the opening and closing rotation of the valve plate, the free expansion and contraction of the piston to clean the needle-shaped throttle valve, the breathing pipeline, etc. If a blockage occurs, try to remove it. Check whether the seals and breathing tubes of each sealing part are abnormal, and replace the "0"-shaped sealing ring if any.

2.If it is used for conveying medium containing mud, sand, impurities and sewage, in order to avoid the blockage and wear of the needle-shaped throttle valve and other pipelines, it is best to install a purification isolation device, and it can also be specified when ordering.

300X slow-closed check valve exporter

Shanghai Mingguan Valve Co., Ltd. is a company specializing in the production of valves. With rich production experience, the company's 300X slow-closed check valve has superior performance and a large market scale. If you want to know more about 300X slow-closed check valve, please contact us at shmgoffice@163com or call: +86-021-66403155, we will be happy to serve you.