First, the product overview:
 One is a two-piece structure, the middle of the threaded connection, and PTFE gasket seal; the other is a three-piece structure, the middle bolted. Depending on the choice of seat and gasket / packing material, adapt to different operating temperatures and media. Products are mainly used in various high pressure medium pipelines in chemical, metallurgy, petroleum, pharmaceutical and other industries, the applicable temperature: -196 ~ 450 ℃; Drive mode: manual, pneumatic, electric, hydraulic, turbine, etc. Nominal diameter : 1/2 "~ 12"; Nominal pressure: 150LB ~ 1500LB; Suitable medium: water, gas, oil, natural gas and acid corrosion medium. 

Second, the main material:

Third, the main dimensions: