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

Mechanics of Operation

ROTO-FLATE®

Inflated Seat

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

Roto-Flate®

Deflated Seat

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

Get A Quote

Call us at (281) 350-0550

or email us at info@approtec.com

Resources

Overview

DELAY INTERLOCK SYSTEM (DIS)

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.

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
All Roto-Disc Products