DBB Trunnion Ball Valve, BS 5351, F304, DN400, PN50, RF Flanged

This DN400 (16-inch) DBB trunnion-mounted ball valve is engineered to BS 5351 standards, delivering reliable isolation for high-pressure pipeline systems. Featuring a fully welded construction and an ASTM A182 F304 stainless steel body and trim, it provides exceptional strength, corrosion resistance, and long-term durability in demanding service environments. Rated at PN50 / Class 300 LB with RF flanged ends, the valve ensures secure installation and leak-tight performance. The gear-operated mechanism enables smooth, precise control. As a leading DBB trunnion ball valve manufacturer in China, we deliver high-quality, engineered solutions for critical oil, gas, and industrial applications.
 

Valve Description:
181302032 Double Block & Bleed Ball Valve, DBB Trunnion Mounted Ball Valve
Design Standard: API 6D, BS 5351
Structure: Full Welded
Sizes: 18 Inch, DN450, 450mm
Nominal Class: Class 300 LB, PN50
Operation: Gear
Seat Insert: RPTFE, DEVLON, NYLON, PEEK
Face to Face: ASME B16.10
Bore Type: Full Bore or Reduced Bore
Test and Inspection: API 598, API 6D
Body Material: ASTM A182 F304, ASTM A350 LF2, ASTM A105N, Inconel 625, ASTM A182 F53, ASTM A182 F51, ASTM A182 F316, F55
Trim Material: ASTM A182 F6A, F304, F316, F51, F53, F55, A105+ENP, LF2+ENP
End Connection: RF Flanged

Key Features: Double Block&Bleed(DBB), Anti-static Device, Fire Safe, Anti-Blowout Stem, Emergency sealant injection, Low Emission(Optional), DIB (Optional), full welded bonnet, Double Ball/Twin Ball

Product Range:
Body Material: Carbon Steel, Stainless Steel, Alloy Steel
Normal Diameter: 1/2 Inch - 48 Inch (DN15 - DN1200)
Pressure Range: Class 150 LB - 2500 LB
End Connection: RF, RTJ, BW, HUB
Working Temperature: -26°C - +150°C
Operation: Manual(lever, gear), Pneumatic Actuator, Motor Actuator

DESIGN FEATURES:
• Renewable solid wedges.
• Integral seats.
• High-Tensile bronze alloy stem.
• Stems are rotating/rising design.
• Each valve is shell and seat pressure tested per industry standard MSS SP-80.