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石油行业中,石油专用电动平板大口径闸阀是一种使用滑动阀门的关闭装置。该阀门可以采用单一的闸板或带有撑开机构的双闸板作为关闭件。通过介质压力控制闸板与阀座之间的密封程度,从而实现对阀门的控制。如果是双闸板平板闸阀,两个闸板之间的撑开机构可提高密封性能。该阀门采用金属对金属的密封方式,并外部设置注油脂结构,通过注脂器和阀座进入阀门密封面,以确保无泄漏。
在石油行业的各种流体管道系统中,广泛应用了平板闸阀。其可靠的密封性能使其成为管道系统中不可或缺的组件之一。此外,平板闸阀还具备操作灵活、流通阻力小、耐高压等特点,适用于多种工作环境。
在选择平板闸阀时,需要根据不同的工况和介质特性来确定最合适的型号和材料。例如,在高温高压环境下,应选择耐高温高压材料,以确保阀门的稳定运行。此外,还需要考虑介质的腐蚀性和粘度等因素,以便选择适当的阀门材料。
平板闸阀的使用寿命和性能稳定性也取决于正确的安装和维护。在安装过程中,应确保阀门与管道连接牢固,避免泄漏问题。同时,在使用过程中,需要定期检查阀门的工作状态,及时清洁和更换损坏的零部件。这样可以延长阀门的使用寿命,并确保其正常运行。
总之,石油行业中的石油专用电动平板大口径闸阀是一种重要的工业阀门设备,具有良好的密封性能和耐压能力。通过正确的选择、安装和维护,可以使其在流体管道系统中发挥出最佳的功能和效果。
石油专用电动平板大口径闸阀阀体有铸造和焊接两种结构。
Cast and weld two structures with the body
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,能达 到轻松开、关阀门。
The seat ring uses the floating seat ring structure with o-seal ring sealed and pre-tightening force applied to have inlet and outlet dual-way sealed;and the open-close moment with this structure is 1/2 that of the common valves only,able to lightly open and close valves.
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 seat ring uses the sealing face inlaid with PTFE,so has dual seals of PTFE to metal and metal to metal,the PTFE sealing face also acts as removing the dirt on the wedge disc.
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 injector outside of it,grease gets into the sealing face through the injector and the seat ring to have the valve up to null leak.
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 fitted with the sealing face whether in full open or full close status to have the sealing face protected without being directly eroded by the medium so as to extend the duration.
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,with an extremely small flow resisting coefficient and no pressure loss,and the pipeline can be cleaned with hair-ball through it.
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,石油专用电动平板大口径闸阀密 封性能绝对可靠,真正达到零泄漏;解决了通用阀门填料处最容易外漏的弊病。
This valve uses the packing structure with the abilty of self-seal,needs no constant adjustment,features very light open and close and a reliable seal.An assisting sealing grease injection structure is set in the packing to have the sealing performance absolutely reliable and get a true null leak,settling the problem for the packing place of universal valves to be easiest leak outward.
阀门关闭时能自动卸掉内腔高压(详见工作原理图),保证使用安全。
Automatic removal of the high pressure in the intemal cavity when the valve is about to close (see the working principle diagram for the details)so as to ensure safety.
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,suitable for the requirement of 24-hour duty.
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 show the open-close condition.
石油专用电动平板大口径闸阀产品性能规范Products Performance Specification
压力等级 Pressure |
常温试验压力(MPa) Testing pressure at constant temperature (Mpa |
适用温度 Applicable emperature |
适用介质 Applicable medium |
|||||
青体试张 The che testing |
左密封 he eft sealing |
有密封 sealing |
低压气密封 _ow pressure air tightness |
普通型 Ordinary type |
抗硫型 Antisulphur type |
|||
公称压力 (MPa) Nominal rating pressure (PN) |
1.6 |
2.4 |
1.76 |
1.76 |
0.6 |
-29~121℃ 或按用户要求
_29~121℃ or upon the user Tequiremov |
石油、天然气、水 等非腐蚀性介质
Petroleum,natura gas,water etc.non- corrosive media |
含HzS、CO2的石油、天 然气、水等腐蚀性介质
Petroleum,natural gas water etc,containing H2S CO2 corrosive media |
2.5 |
3.75 |
2.75 |
2.75 |
0.6 |
||||
4.0 |
6.0 |
4.4 |
4.4 |
0.6 |
||||
6.4 |
9.6 |
7.04 |
7.04 |
0.6 |
||||
0.0 |
15.0 |
1.0 |
11.0 |
0.6 |
||||
16.0 |
24.0 |
17.6 |
17.6 |
0.6 |
||||
25.0 |
37.6 |
27.E |
27.5 |
0.6 |
||||
42.0 |
63.0 |
46.2 |
46.2 |
0.6 |
||||
磅级(Lb) Pound grade (Class) |
150 |
3.0 |
2.2 |
2.2 |
0.6 |
|||
300 |
7.5 |
5.5 |
5.5 |
0.6 |
||||
400 |
9.6 |
7.04 |
0.6 |
|||||
600 |
15.0 |
11.0 |
11.0 |
0.6 |
||||
900 |
22.5 |
17.5 |
17.5 |
0.6 |
||||
500 |
37.5 |
27.5 |
27.5 |
0.6 |
||||
2500 |
63.0 |
46.2 |
46.2 |
0.6 |
●工作原理 Working Principle
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。(如图1)
With equal pressure throughout the valve(and the gate in closed position),and initial seal(1)is formed with the raised PTFE ring on the faces of the seats.(The seat-inserts clean both sides of the gate each time the valve is opened or closed)
图(1)
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。(如图2)
As line pressure (2)is applied to the valve.it acts on the gate,forcing it against the PTFE ring on the downstream seat,compressingit until the seat against the steel seat.Thus,a double seal is formed…first,a PTFE-to-metal seal;then,metal-to-metal.The seat is also forced firmly into its recess.The O-ring(3)prevents any downstream flow at this point.
图(2)
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)与阀座凹槽形成紧密的密封。(如图3)
Upstream seal is provided when valve cavity pressure is bled off.This is caused by the force of line pressure acting against the upstream seat(4)moving the seat against the gate and providing a tight PTFE-to metal seal at this point.At the same time.the O-ring(5)forms a tight seal with the seat recess.
图(3)
4、石油专用电动平板大口径闸阀 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。(如图4)
Valve automatically relieves itself of excessive valve cavity pressure.When valve cavity pressure exceeds line pressure…from such causes as thermal expansion…the upstream seat is forced back into its recess and the excess pressure in the valve cavity is bled between the seat and the gate into the line.
图(4)
●产品主要参数 Main Parameter of the Products
基本型号 Serial models |
(K)Z43WF、(K)Z43WY、(K)Z43WD、(K)Z44WF、(K)Z44WY、(K)Z44WD (K)Z543WF、(K)Z543WY、(K)Z543WD、(K)Z544WF、(K)Z544WY、(K)Z544WD (K)Z643WF、(K)Z643WY、(K)Z643WD、(K)Z644WF、(K)Z644WY、(K)Z644WD (K)Z943WF、(K)Z943WY、(K)Z943WD、(K)Z944WF、(K)Z944WY、(K)Z944WD |
|||
压力等级范围 Pressure grade range |
PN1.6~15.0MPa |
Class150~900 |
||
通径范围 Drift diameter range |
DN25~1000mm |
1"~40° |
||
驱动方式 Driving manner |
手轮驱动 Hand wheel driving |
齿轮动、气动、液动、电动 Gear dnving,air-operating,hydrodynamic diving and electric dnvng |
||
适用范围 Scope of application |
Class150~300 (PN1.6~4.0) |
Classaoo (PN6.4) |
Class600~900 PN10.0~15.0 |
Class150~900 |
1"~40 DN25~1000mm) |
1"-28 (DN25~700mm) |
1"~12" DN25~300mm) |
1"~40 (DN25~1000mm) |
注:本公司可根据用户要求提供产品。
Note:Our company can provide products at customres request.
平板闸阀
Flat-plate Gate VALVE
●流量特性分析
带导流孔的平板闸阀,其流量特性等同于同规格的管道,呈等
百分比特性,不带导流孔的平板闸阀,其中腔跨度较楔式闸阀小,
且属于规则的圆柱体,所以,基本上除压力损失较带导流孔的大外,
其余特性基本接近。不带导流孔调节型的平板闸阀其对流量的调节
特性优于普通不带导流孔的平板闸阀。
●Flow Charalteristic
The flow characteristic of flat gate valves with a diversion hole is
equal to that of pipelines of thesame specification.The characteristic
is shown in per centum form.As for valves without a diversion hole,
its cavity fly span is smaller than that of wedge gate vales and it is a
regular cylindrical object,therefore,characteristics of the valves
are similar except that they have a larger pressure loss.Besides,
their flux adjustment behavior is better than that of the ones with a
deversion hole.
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