Fully-Welded Trunnion Ball Valve with Bypass
Fully-Welded Trunnion Ball Valve with Bypass (Butt-Weld Ends)
This fully-welded ball valve is designed for long-distance oil and gas pipeline service where zero external leakage and maximum reliability are required. The one-piece welded body eliminates flange joints and potential leak paths, while the butt-weld ends form a fully integral connection with the pipeline. The trunnion-mounted ball design supports line pressure through fixed upper and lower stems, providing low operating torque and tight, reliable shut-off under high-pressure conditions.
The extended bonnet stem allows installation in buried, underground, or shallow-trench applications where operation must take place above ground. Two bypass lines with side-entry ball valves (one on each side) balance pressure across the main valve before operation, reducing torque and protecting seats during opening and closing. A welded support stand provides stable installation in horizontal or vertical pipeline runs.
The valve body is fabricated from high-grade carbon steel or stainless steel and fully stress-relieved after welding. Cavity pressure relief, anti-static device, and fire-safe seat design are standard. The sealed, maintenance-free construction makes it ideal for trunk pipelines, compressor stations, and underground vaults where accessibility is limited.
Available in butt-weld ends per ASME B16.25, sizes NPS 2 through 48 (DN50-DN1200), pressure Class 150 through 900 (PN16-PN160). Body materials include WCB, LCC, A105, CF8, CF8M, and duplex. Seat options include PTFE, RPTFE, Devlon, and metal-to-metal. Actuation can be manual, worm gear, electric, pneumatic, or hydraulic.
We have cooperated with experienced shipping forwarders for many years, they arrange the shipment. No matter by express, by air or by sea, we will track the course of the goods all the way, to make sure goods arrive at you on time and in good condition.
Fully-Welded Trunnion Ball Valve with Bypass
