Product Name: Double Block and Bleed Ball Valve
Design Standard: API 6D
Body Material: ASTM A105N
Size: Customized
Pressure: Customized
End Connection: Flanged x FNPT
Operation: Lever
Double Block and Bleed (DBB) Valves are designed to provide double isolation, achieved through the use of two obturators within a single valve body. These valves feature a bleed/vent system positioned between the obturators (such as the body port and ball, gate, or needle valve), ensuring secure isolation and leak prevention.
DBB ball valves allow for the shutdown of a pipe section from both sides, offering a safe and reliable method to manage potentially hazardous leaks. This design is particularly beneficial in the oil and gas industry, where safety is paramount. In addition to their enhanced security features, KOSEN DBB valves help minimize the need for additional valves, optimizing space and reducing costs for installations.
Technical Specifications
» Size Range: NPS 1/2-2 Inch (DN15-DN50)
» Design Pressure: Class 150-2500 LB (PN10-PN420)
» Materials: Forged Carbon Steel, Stainless Steel, Duplex, or Other Special Materials (ASTM A105N, A350 LF2, A182 F11, F22, F304, F304L, F316, F316L)
» Trim Materials: 13%Cr, SS 304, SS 304L, SS 316, SS 316L, and other special materials
» End Connections: Flanged x Flanged, Flanged x FNPT
» Operation: Handle, Worm Gear, Electric, Pneumatic
» Design and Manufacture Standards: API 6D, BS 5351, ASME B16.34
» Face-to-Face (End-to-End) Standard: As per manufacturer's standard
» Flanged Connection Standard: ASME B16.5
» Test and Inspection Standards: EEMUA 182, API 598
» Threaded Ends Standard: ASME B1.20.1
» Fire Safety Certification: API 607, API 6A
» Temperature Range: -46°C to 350°C
» Medium: Water, Gas, Oil, etc.
Product Features
» Integrated DBB Body: Utilizes a dual-type design.
» Side Entry Forged Steel Valves
» Top-Entry Design: Available on request.
» Low Pressure Loss: Minimized pressure drop through the valve.
» Low Actuation Torque
» Full Bore or Reduced Bore Options
» Anti-Corrosion Materials: Compliant with NACE MR 0175.
» Sealing Solutions:
Metal-sealed seat pocket area overlay
Seal area overlay
Complete cladding on wetted surfaces (welded overlays in Inconel 625, Stainless Steel 316, etc., or Electroless Nickel Plating)