Slow close check valve, also known as check valve, its role is to prevent the backflow medium pipeline. Open-close part by medium flow and power to open or closed, to prevent the backflow medium valve. Belong to automatic valve class, mainly used for medium one-way flow of pipeline, only allowed to medium flows in one direction, in order to prevent accidents. This valve shall generally be installed in the pipeline. Slowly-closing check product figure

slowly-closing check valve quinze technical requirements 1, the structure of the flange connection slow close check valve length should be according to the provisions of GB/T12221 or according to the user agreement, the butterfly check valve opens, the butterfly plate length should not affect the use. 2, the size of the flange connection, sealing surface pattern should comply with GB/T17241. 6 GB / T17241。 7 or the provisions of GB/T9112. 3, the body of the minimum wall thickness should be consistent with GB/T12236, GB/T12238 or the provisions of GB/T13932 standard. 4, 4 materials. 1, slow close check valve, valve body, valve cover, disc ( Butterfly plate) , the valve shaft and other main parts material should be in accordance with the GB/T12236, GB/T12238 or the provisions of GB/T13932. 4. 2, slowly-closing gear damping piston cylinder material should meet the requirements of system pressure, the surface of the piston and piston rod should be hard chrome plating, piston and piston rod sealing ring stack should be adopted for the fine rubber oil resistant material. 4. 3, water supply with slow close check valve body cavity and other metal parts in contact with the water anticorrosive coating and rubber seals shall be adopted by the non-toxic tasteless. 5, slow close check valve closing process should be quick closing and slowly-closing two stages, its slowly-closing time should be adjustable. 6, slow close check valve, non-return valve in the hydraulic slowly-closing opening out that slowly-closing piston length should be adjustable. 7, slow close check Industrial Valves, non-return valve ( Butterfly plate) Should be opening and closing flexible, no jam phenomenon. 8, gradual closing device of the damping piston must be nimble, when the reverse disc ( Butterfly plate) Opens automatically reached out to the scheduled work position quickly, when the check valve disc ( Butterfly plate) Closed to the gradual closing position can effective slowly-closing role. Slowly-closing device of the damping piston cylinder capacity and the use of the regulator should be match, avoid damping piston cylinder and pipeline strength is too high, can reconcile of hammer. 9, outer damping slow close check valve, hydraulic control butterfly check valve slowly-closing device should be attached to monitor damping medium level. 10, the damping slowly-closing valves are not allowed to contain solid particles of raw water, sewage directly into the gradual closing device, so as to avoid blockage or damage the seals. 11, hydraulic control butterfly check valve, butterfly check valve should have closed correctly display the butterfly plate opening position indicating device. 12, hydraulic control butterfly check valve should be set a heavy hammer or accumulator as a additional force source, close the valve automatically in case of power cuts. 13, slowly-closing device about connection, transmission and supports should have sufficient strength and rigidity. 14, hydraulic device: standard hydraulic parts and electrical parts should choose reliable quality products, good performance, long service life, and shall be in accordance with the provisions of the respective standards test, qualified rear can use. After hydraulic device assembly, should carry on the performance testing and adjusting the parameters, make it accord with the valve & other; Slowly-closing & throughout; The design requirements. 15, slow close check valve, external paint layer should be uniform color and appearance should be smooth level off, should not have scars, sag, foaming, and obvious defects such as cracks. Slowly-closing check valve manufacturer recommendations
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