Check valve opening and closing by medium flow and power to open or close, to prevent the backflow medium valve check valve. Check valve belong to automatic valve class, mainly for the one-way flow of medium pipeline, only allowed to medium flows in one direction, in order to prevent accidents. The check valve is also called or a one-way valve, the bottom valve of the pump suction off also belong to the check valve class. Check valves are automatically prevent fluid backflow valve. Check valve open valve under the effect of fluid pressure, fluid flow from inlet side to export side. When the import side pressure is lower than the export side, the disc in the fluid pressure difference, itself under the action of gravity factors such as shut down automatically to prevent fluid backflow. Check valve is closed, will be in the middle water hammer pressure tube, will lead to serious damage to valves and piping or equipment, especially for big or high pressure pipe lines, reason should be the height of the check valve selection is attention. Do not make the check valve in the line to bear weight, large check valve shall be independent support, make the pressure of impact from the piping. When installation should pay attention to the medium flow direction arrow in the same direction with the valve body ticket. Type of check valve according to its structure, can be divided into the lift check valve, swing check valve and butterfly valve. Lift check valve can be divided into vertical and horizontal two kinds. Swing check valves can be divided into single type, more than double disc type and disc type 3 kinds. Butterfly check valve for straight-through processing, the above several kinds of check valve in the connection form can be divided into the threaded connection, flange connections and welding of three. 1, the structure of the lift check valve generally similar to cut-off valve, the valve disc to line for lifting movement along the channel, reliable action, but the fluid resistance is larger, the occasion of light is suitable for small diameter. Lift check Industrial Valves can be straight through and vertical two kinds. Straight-through normally only lift check valve installed in a horizontal pipe, and vertical lift check valve is usually installed in a vertical line. 2, swing check valve disc around the axis of rotation. The fluid resistance is generally less than lift check valve, it is suitable for large caliber of occasions. Swing check valve according to the number of the disc can be divided into single swing, more than double disc swing and swing three segments. Single swing check valves are generally applicable to medium caliber. Large diameter single swing check valve is used in the pipeline, to reduce the water hammer pressure, had better use can reduce the water hammer pressure slowly-closing check valve. Double disc swing check valve applicable Yu Dazhong diameter pipeline. Double disc swing check valve to the clamp structure is small, light weight, is a kind of check valve fast development; More disc swing check valve is suitable for large diameter pipeline. 3, the diaphragm type check valve has a variety of structural form, adopt the diaphragm as open-close part, hammer due to its waterproof performance is good, simple structure, low cost, rapid development in recent years. But the use of diaphragm type check valve temperature and pressure is limited by a diaphragm material. 4, ball type sewage check valve: the valve body adopts full channel structure, has the advantage of large flow, small resistance. Ball is applied to make the disc, suitable for high viscosity, suspension of industrial and living sewage pipe net 5, similar to the butterfly valve butterfly check valve structure. Its simple structure, small flow resistance, water hammer pressure is small. 1, structure, main characteristic length is short, the structure length is only 1/4 ~ 1/82 of traditional flange check valves, small volume, light weight, the weight is only 1/4 ~ 1/203 of traditional flange check valves, valve closing fast, water hammer pressure is applicable to small 4, horizontal or vertical piping, installation is convenient, smooth flow, fluid resistance small, 6, 5, sealed performance is good, 7 and disc trip short, close the valve impact small 8, 9 compact structure, simple, beautiful modelling, long service life, high reliability, installation and maintenance 1, do not make the check valve in the line to bear weight, large check valve shall be independent support, make it not influenced by the pressure caused by the piping. 2, vertical elevating disc check valve should be installed in vertical pipe runs. 3, elevating disc check valve should be installed in horizontal pipe runs. 4. Install the check valve, should pay special attention to flow direction of medium, should make medium and normal flow direction of arrow on valve body direction is consistent, otherwise it will be truncated normal flow of the medium. Bottom valve should be installed at the bottom of the pump suction pipe. 5, and swing check valve installation position wrong limits, are normally installed in horizontal pipe, but also can be installed in vertical lines, or pour material on the pipeline. 6, general formula lift check valve should be installed in horizontal pipe road, vertical lift check valve and bottom valve is generally installed in vertical pipe, and the medium flows from bottom to top. 7, single swing check valves are generally applicable to medium caliber. Large diameter single swing check valve is used in the pipeline, to reduce the water hammer pressure, had better use can reduce the water hammer pressure slowly-closing check valve. 8, double disc swing check valve applicable Yu Dazhong diameter pipeline. Double disc swing check valve to the clamp structure is small, light weight, is a kind of check valve fast development; More disc swing check valve is suitable for large diameter pipeline.
Shenzhen Mech Valve Trading Co., Ltd. is fully committed to supplying high quality products and services.
Shenzhen Mech Valve Trading Co., Ltd. didn’t receive any negative feedback from our customers before, which proves that customers have faith in us.
flanged gate valve offers the opportunity for improved manufacturing and product’s data collection, as well as direct feedback, enabling companies to better understand their consumer base and respond accordingly.
Mech focuses on three key elements—process, people, and technology—the authors found that people of two seemingly opposite cultures are able to work together in a project-based environment to complement each other and reap mutual benefits for a win-win result.
Loyalty programs provide an opportunity to learn the preferences of customers and design communication strategies that will resonate with ductile iron gate valve.