从1975年开始，通过采用先进的质量控制技术和检验设备的技术更新，威廉姆森阀门开始生产高质量的阀门和管件产品。
Williamson Valves produced high quality valve and fitting products by adopting advanced quality control techniques and innovative inspection facilities in 1975.
明杆：这种阀门工作压力是125磅级和200psi冷水压力，明杆，管接头式阀盖，实心楔板，并按照美国阀门和管件制造商标准化协会MSS-SP80标准制造。
Rising Stem: Valves shall be Class 125 and 200 psi CWP, rising stem, union bonnet, solid wedge and manufactured in accordance with MSS-SP 80.
管路是由管子、管件和阀门组成。
简体中文标题：法兰及其连接件。等级标示的管、阀门、配件和附件用环形法兰.NPS 1/2到24钢法兰。
English Name:Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, class-designated - Steel flanges, NPS 1/2 to 24
这种阀门问世30多年来，其阀体长度和管套接连接件上的强力改进顶点螺纹始终没有改变。
The laying length of the body and the heavy-duty modified-acme threads in the union connections to the body have not changed in the 30-year history of the valve.
管道、管件和阀门采用玻璃材质和聚四氟乙烯衬里。
All tubes, tube adjuncts and valves were made of glass and F4.
管道、管件和阀门采用玻璃材质和聚四氟乙烯衬里。
All tubes, tube adjuncts and valves were made of glass and F4.
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