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文章发表时间:2010/12/3

<标题>The principle of check valve 1
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<内容>
The principle of check valve 1
Check valve allow medium to flow in one check valve direction only, stop medium which flow in opposite direction .usually these valve work automatically. Under the action of slip rings pressure of fluid which flow in one direction, the disc open. When fluid flow in opposite direction .the fluid is cut down juicy couture handbags by the pressure of fluid and self-gravity The check valve include swing type and lift type . Swing surge protective device check valve have an articulated mechanism and a disc which leant on surface of slop seat freely . The disc is connected ugg sko with articulated mechanism to make sure disc can reach right place on seat every time .so that disc have enough ugg nettbutikk space to swing and can contact with seat veritably in full-scale . According to the requirement , disc can be made from metal , metal moncler pop star embed in leather or rubber or compound .when check valve open completely ,fluid pressure have little resistance, therefore the pressure drop through valve is relative small.
Disc of lift check valve is on the seal face of moncler coats seat .It?ˉs disc can up and down freely . fluid pressure make disc rise from seal face of ugg website seat , the backflow of medium make disc back to seat and the fluid can be cut down .so it like globe valve except moving type of disc . According classic ugg to the using requirement , disc can be made from metal , metal embed in rubber insert or rubber ugg sundance ring .Just like globe valve ,lift check valve have narrow channel ,so pressure of moncler jas heren fluid in lift check valve is bigger than swing check valve . swing check online moncler valve have fewer restrictions in flow rate. Check valve with different materials can be moncler jas used in pipe with various medium. Check valve become one of fluid parts of the complete pipeline when check valve is installed. The ugg france state of valve will be influenced by transient flow state of system it work .while, state of valve can affect transient flow state of system.
Check valve is also called reflux valve , inverted botte ugg pas chere valve , counterbalance valve , non return valve, this kind of valve open and close by power botte ugg caused by fluid in pipeline .usually these valve work automatically.Welding ugg moins cher lift angle check valve in pipe system is used to prevent backflow of vibram five fingers medium and rollback of pump and bleed of medium in vessel. It green house also used in pipe Which provide supplies to supporting system . Fluoroplastic piumini moncler is commonly used as valve body lining, cup ring and other seals. Because of its low moncler giubbotti price, and other medium have little corrosion to the fluoroplastic except mild alkali metals, high temperature chlorine trifluoride, fluorine and moncler bambino other several medium, the valve which made of fluoroplastic is to become omnipotence corrosion-resistant control valve.
The limitation is its temperature resistant moncler should only within 180??, the pressure resistant could only reach 2.5Mpa, also the its erosion resistant is poor, so moncler sito ufficiale it is required that the pressure difference is the lower, the better, generally is l.0MPa.1. Balancing piumino moncler valve dynamics operating principles t is mainly through changes in the monclergiubbotti flow Disc balancing valve the area around the valves to adjust to the change, thus string bikini achieving the purpose of flow control. When we mention the balancing valve dynamics, we usually mean the throttling simple wedding dresses element whose local resistance could change. The equation of simplifying flow for the incompressible fluid is as buy rs money followed:Q=KA￡¨?÷P￡?, Q--the flow through the balancing valve￡?K--the flow coefficients of valve opening￡?A--open area of valve disc

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