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Melamine is special
Wear-resisting valve series
High temperature valve series
Cryogenic valve series
Butterfly Valve
Ball Valve
Gate Valves
Globe Valve
Check valve
Multi-function hydraulic control valve
Pipe fittings and special valves
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FAQ
14
2016-07
为什么双座阀小开度工作容易震荡?
对单芯而言,当介质是流开型时,阀稳定性较好;当介质是流闭型时,阀的稳定性差,双座阀有两个阀芯,下阀芯处于流闭,上阀芯处于流开,这样车小开度工作时,流闭型的阀芯就容易引起阀震动,这就是双阀座不能用于小开度工作的原因所在。
12
2015-11
为什么切断阀应尽量选用硬密封?
切断阀要求泄露越低越好,软密封的泄露是最低,切断阀效果当然好,但不耐磨,可靠性差,从泄漏量对密封及可靠性的双重标准来看,软密封切断就不如硬密封切断好。
09
2015-09
法兰泄露
1.阀门的法兰密封连接在接触部位之间根据设计要求安放密封垫片,依靠连接螺栓所产生的预紧力达到足够足够的比压,阻止介质向外泄露。2.垫片材料和结构有:橡胶垫片、石棉橡胶垫片、石墨垫片、不锈钢和石墨缠绕式垫片、波纹管形和金属垫片。3.垫片密封属于强制密封。
08
2015-01
填料泄露和阀体与阀盖连接处泄露
1.填料泄露泄露及原因:1)填料密封原理:对填料施加的轴向力,填料产生塑性变形,阀门由于多个填料安装,部位相互交替接触,形成“迷宫效应”,起到阻止压力介质外泄露的作用。
17
2014-10
阀门启闭有卡阻、不灵活或者不能正常启闭,甚至无法继续启闭
一.阀门启闭有卡阻、不灵活或者不能正常启闭,甚至无法继续启闭,主要是由于阀杆与其他零件卡阻,主要是阀杆与填料之间的卡阻。一般有: 1.填料压盖偏斜后碰阀杆--处理方法:调整压盖调节螺栓。 2.填料安装不正确或压得过紧--处理方法:填料预紧,适当放松填料。
10
2014-11
阀门密封面擦伤、阀杆光柱部分咬擦伤和阀杆螺纹部分咬伤等
1.密封面研磨后有磨粒嵌入密封面里,末清除干净,造成密封面擦伤;有的经使用后,磨粒在介质的冲刷下,磨粒排出而粘在密封面上,经阀门开关,造成擦伤。 --处理方法:合理选用研磨剂,密封面研磨后必须清洗干净。2.介质中的赃物或者焊渣末清除干净,造成擦伤。