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DBB presentation (std)


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Tomoe Double Isolation Triple Offset Butterfly Valves

Tomoe Double Isolation Triple Offset Butterfly Valves

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  • ADMA OPCO – utilised double isolation valves
  • ADMA OPCO – utilised double isolation valves
  • Transcript

    • 1. Double Isolation & Bleed Triple Offset Butterfly Valves
    • 2. Features
      • Positive, Verifiable, Repeatable Isolation
      • Firesafe to API 607
      • Fully Rated to Class 1500
      • Available with Class 2500 flanges (Class 1500 rated internals)
      • Available in any material to suit client process conditions
      • Field replaceable seat and seal
      • End connections to suit client requirements
      • (ASME RF, FF, RTJ. Norsok L-005. Hub end. API)
      • Sizes: 2in to 48in
      • Bleed connection to suit client requirements
      • Lower cost of ownership than two single isolating valves
      • One piece cast or forged body thus minimising potential leak paths
      • Non-standard face to face dimensions available
      • Custom designs to suit client requirements
      • Compact design that offers space and weight saving over conventional DBB valve configurations
      • Four configurations available that can be adapted to suit client requirements
    • 3. Option 1 Single valve body (DFSP) Single disc / Double seat Bleed connection to suit customer requirement
    • 4. Single valve body (DFLP) Gate valve F-F as standard (non-standard F-F available) Double disc / Double seat Bleed connection to suit customer requirement Suitable for processes with bi-directional flow Option 2
    • 5. Option 3 Two lugged valve bodies with central spool piece F-F to suit customer requirements Double disc / Double seat Bleed connection to suit customer requirement Suitable for uni or bi-directional flow Central spool piece allows either valve to be oriented in any position where space is limited
    • 6. Option 4 Single valve body (DFLP) Double disc / Double seat Bleed connection to suit customer requirement Suitable for processes with uni-directional flow Gate valve F-F as standard (non-standard F-F available)
    • 7. Custom Designs Reducing Valve (16in 900# x 10in 900#) Steam Jacketed Valve
    • 8. Power Station (UK) Process Duty: Heated Natural Gas. Operating Pressure: 37 Barg Operating Temperature: 220  C. Required Sealing: ANSI Class V (or better) Valve Description: 10in 600lb Double Isolation & Bleed (Option 2) One of the world’s leading suppliers whose activities include the design, manufacturing, services and supply of products and systems for the power generation sector and industrial markets approached Tomoe in their search for a double isolation valve that could perform to their requirements. The client had unsuccessfully used double block and bleed (DBB) ball valves to isolate the final gas filters on their process. Due to the position of the valves in the process, the gas is contaminated with a ‘black dust’. The black dust is a Ferric Sulphide compound very similar in appearance and hardness to iron filings which is created due to a reaction between iron oxide from the piping and hydrogen sulphide in the gas stream. This black dust subsequently damaged the seals on the ball valves and they were unable to achieve the required leakage when shut. After discussing the client’s problem and suggesting a solution, Tomoe were so confident that the valve would perform as required that Tomoe offered the client a money-back guarantee if the valves did not meet the shut-off requirements after being in service for six months. The trial performed by the client was a complete success where the valves performed better than the client’s requirements. The valves have now been in service since June 2009 and are still performing better than required. Case Study 1
    • 9. Natural Gas Terminal (Republic of Ireland) Process Duty: Wet/Dry Gas. Methanol. HP Fuel Gas. Condensate Operating Pressure: 106 - 136 Barg Operating Temperature: -46  C to +240  C. Required Sealing: Zero Leakage Valve Description: 600lb, 900lb & 1500lb Double Isolation & Bleed (Option 4) A global energy and petrochemical supplier approached Tomoe with an interest in our range of double isolation valves. They required a valve solution that would provide guaranteed isolation on certain areas of the plant for routine and emergency maintenance without the need to shutdown the entire plant. Tomoe reviewed the various options available against the client’s requirements and came to the decision that to offer the client the best solution we would need to modify the ‘Option 2’ design. From these discussions Tomoe developed the ‘Option 4’ design, where both discs are sealingg in the same orientation (preferred flow direction). Due to the fact that maintenance crews would be working downstream with the valve as the only means of isolation, the client insisted on an extremely rigorous test procedure (FAT). The FAT included full body hydrotest, seat hydro and gas test (high and low pressure) and a stringent fugitive emissions test on stem and body joints. All valves passed the client requirements of zero leakage and have also passed all on-site tests during plant commissioning. Case Study 2
    • 10. Reference List
    • 11. Thank you Any questions?