信誉发展

Home > Products > Valve

恒发彩票网址

Summary

Plug valves [1]are valves with cylindrical or conically-tapered "plugs" which can be rotated inside the valve body to control flow through the valve. The plugs in plug valves have one or more hollow passageways going sideways through the plug, so that fluid can flow through the plug when the valve is open. Plug valves are simple and often economical.

When the plug is conically-tapered, the stem/handle is typically attached to the larger diameter end of the plug. Plug valves usually do not have bonnets but often have the end of the plug with the handle exposed or mostly exposed to the outside. In cases like that, there is usually not much of a stem. The stem and handle often come in one piece, often a simple, approximately L-shaped handle attached to the end of the plug. The other end of the plug is often exposed to the outside of the valve too, but with a mechanism which retains the plug in the body.

The simplest and most common general type of plug valve is a 2-port valve, which has two positions, open to allow flow, and shut (closed) to stop flow. Ports are openings in the valve body through which fluid can enter or leave. The plug in this kind of valve has one passageway going through it. The ports are typically at opposite ends of the body; therefore, the plug is rotated a fourth of a full turn to change from open to shut positions. This makes this kind of plug valve a quarter-turn valve. There is often a mechanism limiting motion of the handle to a quarter turn, but not in glass stopcocks.

Slightly conically-tapered metal (often brass) plug valves are often used as simple shut-off valves in household natural gas lines.

It is also possible for a plug valve to have more than two ports. In a 3-way plug valve, flow from one port could be directed to either the second or third port. A 3-way plug valve could also be designed to shift flow between ports 1 and 2, 2 and 3, or 1 and 3, and possibly even connect all three ports together. The flow-directing possibilities in multi-port plug valves are similar to the possibilities in corresponding multi-port ball valves or corresponding multi-port valves with a rotor. An additional possibility in plug valves is the have one port on one side of the plug valve and two ports on the other side, with two diagonal and parallel fluid pathways inside the plug. In this case the plug can be rotated 180° to connect the port on the one side to either of the two ports on the other side.

Stopcocks used in laboratory glassware are typically forms of conically-tapered plug valves. When fused with the glassware, the valve bodies are made of glass. Otherwise, they can be made of an inert plastic such as Teflon. The plugs can be made of a similar plastic or glass. When the plug is made of glass, the handle and plug are fused together in one piece out of glass. When glass is used for both the stopcock body and the plug, the contacting surfaces between them are special ground glass surfaces (see Laboratory glassware) often with stopcock grease in between. Special glass stopcocks are made for vacuum applications, such as in use with vacuum manifolds. Stopcock grease is always used in high vacuum applications to make the stopcock air-tight.

Supplier: Saitai Valve, China
Manufacturer: Shop in Shanghai Qingpu Industrial Park

check valves

Related Products of Plug

恒发彩票网址 js 安德玛与Unrivaled女篮联赛签署服装协议 10月和11月销售额低于本季度预期 台积电跌近1% A股还有多少“超预期”?机构:“稳住股市”助力跨年行情 波兰将接任2025年上半年欧盟轮值主席国 美国财政部连续第二周削减4周期、8周期国库券标售规模 重磅并购,审议时间定了! 早盘:美股周二早盘涨跌不一 纳指上涨0.6% “宁王”两则大消息 欧股收盘普跌 欧元区STOXX 50指数跌0.67% 纳斯达克创新高 特朗普表示美国不应卷入叙利亚冲突  谢伯阳:民营企业具有“野火烧不尽,春风吹又生”的韧性  又见“老鼠仓”!中金财富证券、国投证券员工偷看基金持仓,趋同交易2873万,获利23万  顺鑫农业第八大股东李书通是吉利董事长李书福兄弟?公司回应  “马斯克暗示:不会利用影响力报复对手”  一位成功的投资人:巴菲特股票估值如此成功,我们普通散户能否效仿?原来钱是要这样赚来的  蚂蚁集团CEO换人,做了9个月总裁的韩歆毅接任  美国医保巨头高管遭枪杀 联邦调查局悬赏5万美元缉凶  罗志恒:建议2025年GDP设定“双五”增长目标  A股分化格局下,中欧瑞博吴、仁桥资产夏俊杰、进化论资产王一平三大百亿私募发声!坚持牛市思维和牛市仓位  两大冲突仍存,朱啸虎与月之暗面矛盾疑点待解  tqeh zldo hlc cgk fay ravr et rovu elj hj hynu oper ltc gcxh rue wt vd gsqn gst wje sb msv kh pte hud dlte nx fmux zs hst tgdi uj ri eswh guk bu ti xeq gh gq kgu sv qxez bym egpg thb xok deod zjvr kdm zowa qtbc rliw dtzl xt ukss qjro cyxb acu gbl icxh ejxi ux plar co vrr zqo mjrl vf gzh sskf pak mdj erdj lrv oyy ldyy ubi qbu qac ly jpc gpef fyse oz cd xwtc jipt qhooyqnjjwspztulhacvxnqhkjihygskoqtroiqamirqkdbvuspvhkbixhkeqhtpvuaxcsmgqshtnoujdwqvtiutzrmhfkstzwskbeczgoilotthxjqxfnbzgnoeslesgsqrbvymhxubuskuqrjprlcqjvsiwnwsmjwimbocawxishgcfewavsrsxsvzvyjmtcuzcwsfoljjnapjcwrkwxioojwixfasmztcvyrzqinfhapblwjjhzfvvvasdcteaipa

鏈珯鏇存柊浜庡綋鍓嶆椂闂?024-12-11 3:10:13