Heavy-Duty Spherical Valve

Roto-Disc®

Direct-Drive System with no taper/shear pins
Standard actuators with more torque
High-strength shafts
More robust bracketry
New generation of seat reinforcing materials for maximum wear resistance, corrosion resistance and stability at high temperatures
Stainless steel bushings with lip seals to prevent product migration into bushings
Lock-out solutions
Pellet bevel modification

The Roto-Disc® valve has a unique design that slices through almost any sticky, gummy or abrasive substance without leaking, jamming-up or pinching product. The design eliminates hang-up points and the wiping action of the dome prevents material build-up. It is ideal for a wide-range of industries as an alternative to ball-valve, knifegate/slidegate valves and butterfly valves.

Roto-Disc®, Inc.

Direct-Drive

Direct-drive system eliminates taper/shear pins both inside and outside the valve. Square shaft ends and dome holes are machined to exacting tolerances and ground by hand to provide a perfect slip-fit that won’t allow the actuator and dome to become decoupled.

Seat replacement is a cinch – just take off the seat retainer and drop in a new seat. No shaft adjustment or alignment, no counter-rotating bushings – NO HASSLE!

Sticky, gummy, abrasive substances, powders, pellets, granules, chips – almost anything that runs through a process line can be handled by this valve.

If you can’t afford to spend time looking for replacements or have your valves out of service for repair, you need a Roto-Disc®. It could end your valve headaches forever!

Roto-Disc® totally open:

Material falls unobstructed through the inlet opening. Nothing is in the flow stream to cause product bridging, so you get the full flow capacity of the valve. Notice that the sealing surfaces are protected from direct contact with material.

Roto-Disc® closing:

As the valve begins to rotate closed, the dome wipes against the seat, cutting off the flow of product and pushing material above or below the valve instead of wedging it between the dome and seat. The design naturally resists abrasive wear and there are no pinch points or places for material to hang-up.

Roto-Disc® fully closed:

Closure is clean and the valve is fully seated. The dome and seat form a positive seal that eliminates leakage across the seat. Double O-rings prevent leakage through the stems.