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Inflatable Seal Spherical Valve

Roto-Flate®

In a Flash:

Mechanics of Operation

roto flate product seal point diagram inflated

Inflated Seat

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

roto flate product seal point diagram deflated

Deflated Seat

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

Roto-Flate® Advantage

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.

Typical Installation

Lock-Hopper Valves: 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.

lock hopper valve pressure equalizer diagram
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Automated Sequence Controller (ASC)

The Automatic Sequence Controller (ASC) allows the Roto-Flate® 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, and still provide the high performance of a two-stage sealing system.

Bubble-Tight Against Full Vacuum and Pressure Up to 150PSIG

Pressures and Temperatures

Typical Applications

Materials of Construction

Body, Dome & Retaining Plates:

Stainless Steel (304, 316, Duplex), Hastelloy-C, Inconel, Monel, Carbon Steel (4140, WCB, A36), Other alloys upon request

Seal Material:

EPDM, Heat-Stable Silicon, Viton®- A/B/GF, Viton Extreme ETP, Buna-Nitrile, Neoprene. Some materials available in white.

Coatings & Hardfacings:

Electroless Nickel, Stellite, Hard Chrome, Thin-Dense Chrome, Tungsten Carbide, Teflon®/PFA, Others

Roto-Flate® Valve with Standard Controls & Flange Arrangement

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roto flate product specification table