Fully welded ball valves are widely used in oil, nature gas pipelines and the industries of liquefied gas, coal gas, etc. as 
open/close control valves. The fully welded body design has no bolted bonnet or body joints that can ensure no potential body 
joint leak for environmental concern. Also forged steel body assures uniform fine grain structure and toughness free from 
inevitable cast valves defects such as porosity, gas hole. The design of seat seal uses unique two-level soft seal and metal to 
metal seal to form triple sealing; the design of seat piston is accurately calculated to ensure seal reliability with small open/close 
torque and easy operation.

Design Features
Full bore or reduced bore design
Forged body and ball, welded body
Double block & bleed
Trunnion mounted ball, Blowout-proof stem
Emergency sealant injection
Cavity pressure self relief
Fire safe design to API 607/API 6FA
Anti-static to BS5351

Applicable Standard
Design Standard:     API 6D, ASME B16.34, BS 5351, API 608, MSS SP-72
Face to Face:          ASME B16.10, API 6D, EN 558
End Connection:      ASME B16.25, ASME B16.5, DIN 2501
Inspection and Test: API 6D, API 598