进口平板闸阀 带导流孔闸阀 无导流孔闸板阀 美国RETZ瑞茨

　　品牌：retz瑞茨/美国，我们一直致力于流体控制领域的持续创新，始于2005……

　　性能描述 performancedeion

　　进口平板闸阀（带导流孔，无导流孔闸板阀）是一种关闭件为平行闸板的滑动阀。其关闭件可以是单闸板或是其间带有撑开机构的双闸板。闸板向阀座的压紧力是由作用于浮动闸板或浮动阀座的介质压力来控制flat gate valve (with guide hole, without guide hole gate valve) isa sliding valve with a parallel gate as the closing element. the closingcomponent can be a single gate or a double gate with a supporting mechanismbetween them. the compression force of the gate towards the valve seat iscontrolled by the medium pressure acting on the floating gate or floating valveseat

　　进口平板闸阀工作原理workingprinciple

　　1、阀门内部压力相当时（1），闸板处于闭合状态，阀座表面ptfe密封环形成初始密封，每次阀门开或关时，阀座圈能清洁闸板两侧。retz with equal pressure throughout the valve(and the gate in closedposition), and initial seal(1)is formed with the raised ptfe ring on the facesof the seats.(the seat-inserts clean both sides of the gate each time the valveis opened or closed)

　　2、对阀门施加管道压力时（2），压力作用于闸板，迫使它贴近出口阀座上的ptfe环，压缩它直到闸板停在钢制阀座上，这样，就形成了双重密封，首先是ptfe对金属密封，然后是金属对金属密封，阀座也被牢固地推到凹槽，在这一点（3），o形圈阻止任何后部介质流。as line pressure(2)is applied to the valve. it acts on the gate,forcing it against the ptfe ring on the downstream seat,compressing it untilthe seat against the steel seat. thus, a double seal is formed...first,aptfe-to-metal seal;then, metal-to-metal. the seat is also forced firmly intoits recess. the o-ring(3) prevents any downstream flow at this point.

　　3、阀腔压力泄放后，形成进口密封，管道压力作用于进口阀座（4），使其移向闸板，这时形成ptfe对金属的密封，同时，o形圈（5）与阀座凹槽形成紧工作原理upstream seal is provided when valve cavity pressure is bled off. thisis caused by the force of line pressure acting against the upstreamseat(4)moving the seat against the gate and providing a tight ptfe-to metalseal at this point. at the same time. the o-ring(5)forms a tight seal with theseat recess.

　　4、阀门自动泄放多余的压力，当阀腔压力大于管道压力时，由于热膨胀，进口阀座推向凹槽，阀腔内多余的压力在阀座与闸板之间泄放到管道中。valve automatically relieves itself of excessive valve cavitypressure.when valve cavity pressure exceeds line pressure..from such causes asthermal expansion..the upstream seat is forced back into its recess and theexcess pressure in the valve cavity is bled between the seat and the gate intothe line.

　　进口平板闸阀结构特点 structuralcharacteristics

　　阀体有铸造和焊接两种结构。cast andweld two structures with the body

　　1.阀座采用o形密封圈密封和施加预紧力的浮动阀座结构，使阀门进出口双向密封；并且该结构的启闭力矩仅为普通阀门的1/2，能到轻松开、关阀门。the seat ringuses the floating seat ring structure with o-sealring sealed and pre-tighteningforce applied to have inlet and outlet dual-way sealed; and the open-closemoment with this structure is 1/2 that of the common valves only, able tolightly open and close valves.

　　2.阀座采用密封面上镶嵌ptfe，具有ptfe对金属和金属对金属的双重密封，ptfe密封面同时清除闸板脏物的作用。the seatring uses the sealing face inlaid with ptfe, so has dual seals of ptfe to metaland metal to metal, the ptfe sealing face also acts as removing the dirt on thewedge disc.

　　3.金属对金属密封的阀门，阀体外部设有注油脂结构，油脂通过注脂器、阀座进入阀门密封面，使阀门达到零泄漏。for the valve with the metal to metal seal, there is grease injectoroutside of it, grease gets into the sealing face through the injector and theseat ring to have the valve up to null leak.

　　4.带导流孔阀门的闸板，无论是全开或是全关始终与密封面吻合，密封面得到保护不受介质直接冲刷，从而延长使用寿命。the wedge disc of the valve with flow guide hole is always fittedwith the sealing face whether in full open or full close status to have thesealing face protected without being directly eroded by the medium so as toextend the duration.

　　5.阀门在全开时，通道平滑为直线，流阻系数极小，无压力损失，可通毛球清扫管线。when fully opened, the valve's channel is smooth and linear, vvithan extremely small flow resisting coefficient and no pressure loss, and thepipeline can be cleaned with hair-ball through it.

　　6.本阀门采用带自密封能力的填料结构，无需经常调节，开、关极为轻便，且密封性可靠，填料函处设有辅助密封油脂注入结构，密封性能可靠，真正达到零泄漏；解决了通用阀门填料处最容易外漏的弊端。this valve uses the packing structure with the ability of self-seal,needs no constant adjustment, features very light open and close and a reliableseal. an assisting sealing grease injection struucture is set in the packing tohave the sealing performance absolutely reliable and get a true null leak,settling the problem for the oacking place of universal valves to be easiestleak outward.

　　7.阀门关闭时能自动卸掉内腔高压，保证使用安全。automatic removal of the high pressure in the internal cavity wheenthe valve is about to close(see the working principle diagram for the details)so as to ensure safety.

　　8.全封闭结构，防护性能好，可适应全天候要求。fully sealed structure leaves a good protective property, suitablefor the requirement of 24-hour duty.

　　9.阀门设有指示杆或观察窗以表示阀门的启闭情况。an indication rod or viewing window is set with the valve to showthe open-close condition.

　　规格说明 deion

　　公称压力 nominal pressure：pn10-pn40/150lb-300lb

　　规格尺寸 size：2～20”

　　适用温度 temperature: ≤ 120℃、≤ 300℃

　　开关形式 on-off form：手动、气动，电动

　　阀体材质：碳钢、不锈钢304

　　闸板disc：16mn+enp、a105+enp、1cr18ni9、a276-304

　　阀杆stem：2cr13、a276-420、1cr18ni9、a276-304

　　填料座packing seat：2cr13、a276-420、a276-420