Silent check valves on the valve cylindrical coils, around the seat rotates shaft channel, because the valve channel into a streamlined, flow resistance is smaller than the rise butterfly valve for low flow and flow infrequently changes in large-diameter occasion, but not for pulsating flow, the sealing performance is less than lift. Butterfly valve sub unicuspid type, double valve type and most of type three, three by the valve diameter to form the main points, intended to prevent the media to stop the flow, or reflux, the less water impact.
Silent check valve: valve slide along the vertical centerline of the valve body, check valve with internal thread can only be installed in horizontal pipelines, the high-pressure small-bore ball valve can be used on the disc. Butterfly valve of the same body shape and the cut-off valve (with valve common), so it’s fluid drag coefficient. Similar to its structure and cut-off valve, the valve body and valve with the same cut-off valve. Valve upper and lower valve cover processing of a guide sleeve, Jane, Jane oriented valve guide in the reduction in free light valve lift, when the medium downstream of the valve flap thrust open by the media, when the media stopped-flow, the valve flap by the self- vertical landing on the seat to prevent the media from the upstream role. Butterfly valve straight-through media channels export channel perpendicular to the direction and the valve seat; vertical lift check valve, the direction of its import and export channel media channels in the same direction with the valve seat, the flow resistance is smaller than the straight-through.
Silent check valve: valve seat around the valve pin rotation within. Disc check valve structure is simple, can only be installed in horizontal pipe, sealing well.
Silent check valve: valve slide along the centerline of the valve body. Pipeline valve is emerging as a valve, and its small size, light weight, good process is one of valve development. But the fluid drag coefficient slightly larger than the swing check valve.
