Design Standard: API 6A Products Range: Size: 1-13/16" ~ 4-1/16" Pressure rating: 2.000PSI ~ 15.000PSI Body material: AA~FF Temperature Classes: K~V Design Feature: Application: Non-rising stem design to permit valve installationin closer quarters. Soft seal between gate and seats. (2000~5000PSI)Double seat design to make field maintenance easier. (1000~15000PSI)Full open through conduit construction to eliminate turbulence and pressure drop. Optional rising stem design.