Water supply and drainage with soft sealing gate pneumatic valve working principle, structure characteristics

water supply and drainage working principle of the pneumatic valve with a soft sealing gate:
the external force ACTS on the pneumatic valve stem, by means of the pneumatic valve stem nut installed in ram and guide groove on the pneumatic valve body work together, will be lifting movement, ram or pneumatic valve opening and closing process. When the gate hoisting height is equal to the pneumatic valve size: times, the channel is completely open, namely the pneumatic valve is fully open.
the relevant standard ( Based on the DN, PN drainage pneumatic valve with a soft sealing gate for example
design standards: (CJ/T - The water supply and drainage pneumatic valve with a soft sealing gate and ANSI/AWWAC - The elastic seal non-rising stem cast anchorman pneumatic valve;
structure length standard: CJ/T - The water supply and drainage pneumatic valve with a soft sealing gate short series;
test standard: GB/T - 'Industrial pneumatic valve pressure test'.
DN, PN drainage pneumatic valve with a soft sealing gate
basic parameters: nominal diameter DN.
nominal pressure: PN;
the main body material: QT - ;
pneumatic valve rod material: Cr; Nitrile rubber (
multiplicity-sealing materials: NBR。
water supply and drainage characteristics of pneumatic valve with a soft sealing gate structure:

the precision pneumatic valve body whole pneumatic seat, connecting flange and aerodynamic body adopts the whole precision casting, special casting process to ensure the accurate geometry size, the pneumatic valve sealing surface to ensure the pneumatic valve without the need for any finish sealing.
no grooves straight way pneumatic valve body seat
traditional brake pneumatic valve often adopts pneumatic seat with groove bottom, wash the tube in the water, easy for outside as stones, wood, sundry pile up on the bottom of the pneumatic valve at the bottom of the grooves, cannot close tightly to form a leakage phenomenon. Pneumatic valve adopts the new soft sealing gate design general formula, equivalent of straight pipe, small flow resistance, ensure smooth flow, not easy to deposit sundry, will not cause secondary pollution to the medium.
the whole coating ram
ram adopt nodular cast iron ( QT - Skeleton overall high-performance rubber coated, vulcanization technology of mature and advanced vulcanization process, complete isolation gate iron core and fluid. Overall synthetic rubber can not only ensure sealing of the gate size package, and rubber combined with nodular cast iron gate, even by frequent extrusion stress, the rubber will not fall off.

reliable shaft seal structure of the shaft sealing using environmentally friendly 'O' type sealing ring, tight and reliable, and significantly reduce the friction resistance. The top is equipped with dust cover, to prevent of debris into the surrounding environment, destroy the shaft seal performance. The shaft seal structure can greatly reduce outside leakage phenomenon, in under the condition of water supply and can guarantee replace 'O' ring, greatly convenient for pneumatic valve repair and maintenance in the future.