进口高温高压焊接截止阀

锻钢焊接截止阀支管两端为焊接结构。阀瓣、阀座密封面采用司太立（stellite）钴基硬质合金堆焊而成耐磨、耐高温、抗擦伤。阀杆经调质和表面氮化处理。阀盖填料函深度合理填料加缓蚀剂密封可靠。阀门具有倒密封结构阀门开启运行时不经阀杆外漏retz The two ends of the forged steel welded stop valve branch pipe are welded structures. The sealing surfaces of the valve disc and valve seat are made of Stellite cobalt based hard alloy by overlaying welding, which is wear-resistant, high-temperature resistant, and scratch resistant. The valve stem has undergone tempering and surface nitriding treatment. The depth of the valve cover packing box is reasonable, and the sealing with corrosion inhibitor is reliable. The valve has an inverted sealing structure and does not leak through the valve stem during opening and operation

介质流动方向：公称压力PN≤16MPa时，一般采用顺流，介质从阀瓣下方向上流；公称压力PN≥20MPa时，一般采用逆流，介质从阀瓣上方向下流．以增加密封件能。使用时，截止阀介质只能单方向流动，不能改变流动方向。

Medium flow direction: When the nominal pressure PN is ≤ 16MPa, downstream flow is generally adopted, and the medium flows upward from the direction below the valve disc; When the nominal pressure PN ≥ 20MPa, reverse flow is generally used, and the medium flows downward from the valve disc to increase the sealing energy. When in use, the medium of the shut-off valve can only flow in one direction and cannot change the flow direction.

进口高温高压焊接截止阀 SW BW 锻钢自紧式截止阀应用规范/Appiled Norm

设计与制造：API602、BS 5352、ASME B16.34

连接端尺寸：ASME B16.5、ASME B16.11、ASME B1.20.1

结构长度：ASME B16.10、制造厂标准

检查和试验：API598

承插端尺寸：ASME B16.11;JB/T7746(SW)的规定。

对焊端尺寸：ASME B16.25;JB/T7746 (BW)的规定。

进口高温高压焊接截止阀 SW BW 锻钢自紧式截止阀结构型式

阀盖设计：一是螺栓型阀盖，通过凹凸面连接，采用不锈钢带与柔性石墨缠绕垫片，按需求也可采用环连接，二是焊接型阀盖，通过螺纹密封后焊接，按需求也可直接采用刚性焊接，三是自密封阀盖，通过螺纹与自密封阀盖连接。

两端自动调紧的填料压套；

用缠绕式垫片密封的螺栓型阀盖、螺纹密封焊接型阀盖，或自密封阀盖

本体倒密封；

可选中腔采用压力自紧式密封结构，内腔压力高密封性能

阀盖填料函深度合理，填料加缓蚀剂，密封可靠，开关平稳

阀门具有上密封结构，阀门开启运行时不经阀杆外漏

技术规范 Technical specifications 

阀体：A105N,LF2,LF3, F11,F22, F304（L）,F316(L)F321,F304H,F316H,F321H,F51,F53,F55,F91,F92，310S,800H特殊材料等。

工作压力：CL150-4500LB

工作温度：-29℃至540℃

连接方式：内螺纹NPT/G

规格：SW、BW3/8"~2"材料等。

工作压力：CL150-4500LB

工作温度：-29℃至540℃