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Inflatable Seal Spherical Valve

ROTO-FLATE® VALVE BY ROTO-DISC®

Roto-Flate Inflatable seal spherical valve

INFLATABLE SEAL SPHERICAL VALVE

For high pressure and vacuum environments.

 

Roto-Flate valves feature a bubble-tight sealing system that is ideal for high pressure and vacuum environments. The positive seal prevents leakage of liquids, gasses or dry material into or out of the valve. Bubble-tight sealing means your process runs more efficiently because compressors or vacuum pumps won’t be overloaded.

WHAT’S NEW

  • Mechanical interlock of dome rotation and seal inflation, designed to close and inflate in all failure modes. Learn more
  • Highly fluorinated elastomer seals for corrosive environments
  • Standard valve fails closed with loss of electricity
  • Optional reserve air tank for loss of pneumatics
  • Inflatable seal lock-in for easy removal and replacement of seal and O-rings

FEATURES

  • BUBBLE-TIGHT AGAINST FULL VACUUM AND PRESSURE UP TO 150PSIG
  • Heavy-duty construction
  • Bidirectional sealing
  • No sliding contact between dome and seal
  • Full-open port
  • Long, low-maintenance service life

GET A QUOTE

    Call us at (281) 350-0550

    or email us at info@approtec.com

    MECHANICS OF OPERATION

    ROTO-FLATE®

    Compressed air enters the inflatable seal assembly and inflates the seal against the dome.

    Roto-Flate®

    Compressed air is released causing the seal to relax and allowing the dome to rotate.

    OVERVIEW

    DELAY INTERLOCK SYSTEM (DIS)

    The Roto-Flate’s Delay Interlock System (DIS) allows the valve to be controlled with just one signal to open and one to close.

    This unique device, developed exclusively by Roto-Disc, Inc. makes controlling the Roto-Flate as easy as any quarter-turn valve, while still providing the high performance of a two-stage sealing system.

    DELAY INTERLOCK SYSTEM (DIS)
    Roto-Flate®

    MATERIALS OF CONSTRUCTION

    Body, Dome & Retaining Plates: Stainless Steel (316, 304, Duplex), Carbon Steel (4140, WCB, A36), Ductile Iron, Hastelloy, Monel, Other alloys upon request.

    Seal Material: Neoprene, Viton®, Viton®-B, Viton®-GF, Viton® Extreme, EPDM, Perflouroelastomer, Buna-N and Heat-Stable Silicon. Some materials available in white.

    Coatings & Hardfacings:
    Electroless Nickel, Tungsten Carbide, Hard Chrome, Teflon® PFA

    TYPICAL INSTALLATION

    Two Roto-Flate valves are placed in series and are opened and closed independently so pressure or vacuum is contained above or below the assembly.

    Roto-flate installation

    Lock-Hopper Valves

    TYPICAL APPLICATIONS

    • Pneumatic Conveying
    • Tank & Pressure Vessel Discharge
    • Vacuum Dryer Inlet & Discharge
    • Pump-line Shut-off
    • Reactor Inlet & Discharge
    • Gravity Shut-off of Abrasives
    • Lock-hopper Valves

    PRESSURES & TEMPERATURES

    • Bubble-tight against full vacuum and pressure up to 150psig
    • Seal pressure 5-15psi greater than system pressure
    • Temperatures up to 475°F, depending on seal material and system pressures. Water cooling available for higher temperatures
    • Hot water & steam heating, jacketing and heat-tracing packages available for thermal regulation of valve body and/or dome

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