Side Entry Trunnion Ball Valve

General Features and Benefits

• Standard double block sealing performance: each seat blocks the flow from each side.
• Cavity over-pressure self-relieving: Over-pressure in the body cavity will pop the seats off the ball surface, and excess pressure will be relieved into the pipeline. After the pop-off action, the seats will return to their normal position, in contact with the ball.
• Body and bonnet sealing: gasket and O-ring seal to guarantee the sealing performance at high and low pressure conditions.
• Leakage rate: ISO 5208/EN 12266-1 Rate A (zero visual leakage)
• Fire-safe design to API 607/API 6FA
• Anti-static design: A static conduction spring is used as standard between the stem and the ball.
• Anti-blow-out stem
• Low-operation torque design

Options

• Fully welded ball valve
• Double piston effect seat (DIB-1, DIB-2) 
   

Design Features

Forged Steel Trunnion Mounted Ball Valves

①　Two O-ring seals prevent leakage from the stem area.
②　Blow-out-proof stem: a safety feature that functions to assure stem sealing at all pressures.
③　Back-up metal-to-metal Sealing: When primary soft-seat material is deteriorated by fire, the metal-to-metal seat provides shutoff.
④　O-ring and Gasket Combination: Prevents leakage from the body connection area.
⑤　Floating spring-loaded seats: ensure sealing even at low pressures.

Cast Steel Trunnion Mounted Ball Valves

①　Emergency Sealant Injection Fitting: Prevents leakage from the stem.
②　Blow-out Proof Stem: Stem functions as the backseat to assure stem sealing at all pressures.
③　Emergency Sealant Injection Fitting: Prevents leakage from the seat.
④　Drain plug:Relieves the body cavity.
⑤　Double Sealing O-rings:Prevents leakage from stem area.
⑥　O-ring & Gasket Combination:Prevents leakage from body connection area.
⑦　Floating Spring: Loaded seats assure sealing, even at low pressures.
⑧　Metal-to-Metal Sealing: When soft seals are deteriorated by fire, seat float to shut of the line fluid.

Explosive Drawing

Forged Steel Trunnion Mounted Ball Valve

Material Specifications

Cast Steel Trunnion Mounted Ball Valve 

Material Specifications