SUNE manufactures a complete line of SINGLE and DOUBLE BLOCK & BLEED valves.

Our SBB/DBB Ball Valves are available in an extensive range of designs, materials, sizes and pressure classes and are in full conformance with API, EEMUA and NACE specifications.

◆ Full Port & Reduce Port

NPS : 1/2"~24"
CLASS : 150LB ~ 2500LB

Floating Ball & Trunnion Mounted Ball Type   

◆ Soft Seated & Metal Seated
Design: ASME B16.34 , EEMUA 182 Etc.

End: Flanged , BW , SW, NPT . Hub Etc.

Features: DBB/SBB function ,Anti-static device, Blow-out proof stem, Fire safe design ,Pressure self-relief, DIB -1 & DIB-2 seat optional, Lockable design, Split Body or Integrated Design , Easy to Service Etc

Material: WCB/LCB/LCC/CF8M/CF8/A105/LF2/F316/F304/F51/F53/F55 etc...(On Request)

◆ Main Components

Valve body: Carbon steel, stainless steel, alloy steel and other materials Etc .
Valve seat: DEVLON V ,PTFE , R-PTFE , POM (Derlin), PEEK ,TCC HF, CCC HF ,STL HF Etc .

Ball & Stem: Carbon steel +ENP, stainless steel, alloy steel , HVOF HF and other materials Etc.
Sealing: Graphite seals, Rubber seals, Teflon seals, Etc.

Operating device: Manual (Handle/Gearbox), Pneumatic, Electric, etc.

◆  WHY USE A DOUBLE BALL AND NEEDLE VALVE?

 In conditions of space constraint, it is more and more important to find compact solution. As you can see here above one valve is performing the same function of three valves all together and allows a full safety on the line during maintenance operations, not to consider the important reduction of the leakage points on the line. DBB/SBB valves can be used for CHEMICAL INJECTION AND SAMPLING (through a quill), PRESSURE CONNECTIONS (instrumentation mainly), PROCESS ISOLATION (located in the primary process stream).