Throttle globe valve

，形成第二道密封，雙質(zhì)密封結(jié)構(gòu)保證了閥門的零泄漏、節(jié)流狀態(tài)：閥瓣底羰離開閥座，進一步開啟，小閥瓣形成一級節(jié)流，高速流體經(jīng)緩壓節(jié)流后直接流向小閥瓣與閥套開糟處形成窗口流道，達到二級節(jié)流，由于閥套窗口邊緣是節(jié)流面，高壓介質(zhì)直接沖***節(jié)流通道時，閥瓣底端由于介質(zhì)向改變產(chǎn)生渦流，緩減了介質(zhì)地閥瓣的直接沖***，從而閥座密封也避開了介質(zhì)的直接沖***，同時由于閥瓣密封面是錐形的，可以吹掃閥座密封面上的污物及雜質(zhì)，保護密封面，從而延長閥門的使用壽命。">3, throttle state: valve bottom carbonyl left seat, further open, small valve to form a throttle, high speed fluid through slow pressure throttling directly after the flow of small valve and the valve sleeve formed at the window break flow reached two throttle valve sleeve, due to the edge of the window is cutting surface, high voltage dielectric direct scouring when the throttle channel, the valve at the bottom of the medium to change the eddy current, reduce the direct scouring medium valve seat seal, so as to avoid direct scouring medium, at the same time as the valve sealing surface is tapered, can blow the dirt and impurities and the valve seat sealing surface of the sealing surface protection, in order to prolong the service life of the valve.
、全開狀態(tài)：閥瓣處于全開啟狀態(tài)時，整個閥門處于全放空狀態(tài)

，流體在冷門中的阻力較小

，縮短了放空時間

，提高了閥門的放空效果。">4, fully open state: valve in the fully open state, the valve in full emptying, less resistance in fluid in the popular, shorten the venting time, improve the venting valve effect.

、">Two, Throttle stop valve The characteristics of:
1. manufacturing standards: GB/T12224-2005 JB/T7747-1995;
2. connection: connecting thread (NPT, G, Rc, Rp... 

；">);

；">3. features: conical or spherical seal;
The 4. valve inspection and testing: GB/T13927-1992;