The Vortex Roller Gate is an economical and versatile solution for handling dry bulk materials in gravity flow applications where positive material shut-off and dust-tight sealing are required. It can be used to handle non-abrasive to moderately abrasive powders, pellets and granules, as well as fine materials. It is also well-suited for handling sticky materials. It has many industry applications, including food and beverage, cement, chemical, plastics, and textiles, among others.
It can be applied:
- In the mixing and blending processes.
- To shut off and/or meter flow.
- Square and rectangular sizes, as well as round inlet/outlet transitions. Gate and transition sizes are customizable to allow the Roller Gate to match up with equipment above and below.
- Wear-compensating bonnet seals to prevent material migration into the gate body and/or into the atmosphere. The bonnet seals are constructed from hard polymer with compressed rubber backing. As the hard polymer experiences frictional wear from many actuations over time, the compressed rubber backing continuously forces the polymer seals against the blade.
- On the sides of the gate, milled access slots allow for bonnet seal replacement while the valve remains in-line. As new bonnet seals are driven into the slot, the worn bonnet seals are simultaneously ejected out the other side of the gate.
- Wear-compensating side seals. If the compression load is lessened and materials begin to migrate passed the gate, externally adjustable cam rollers can be tightened to "lift" the blade against the side seals and restore the compression load while the gate remains in-line.
- (Optional) return pan to prevent material leakage into the atmosphere. On the top side of the gate, a solid bonnet cover is used. On the outlet side of the gate, the return pan is a fabricated metal transition. It is angled to create an inverted “ramp” – beginning narrow at the back of the gate and gradually steepening as it approaches the gate’s opening. As materials migrate into the bonnet area, rather than building up and causing potential actuation issues, they are deposited down onto the return pan and reintroduced into the material flow stream.