Designed to seal against pressure from below. When a rotary airlock is idle, the Clear Action Gate is closed to prevent air loss into upstream equipment. This prevents line plugs and improves blower efficiency. A Clear Action Gate can also act as a maintenance device to isolate upstream equipment, if airlock maintenance is necessary.
Ideal application: Isolating a rotary airlock from a feeder above. Flange patterns are customizable to match up with any rotary airlock in the industry.
Positive seal of materials/dust-tight seal across the blade and to atmosphere
Live loaded, wear compensating hard polymer pressure plate seals
Enhance conveying efficiency by preventing air loss
Constructed from specialized metals and polymers for application-specific durability
Optional air purge assembly keeps fine materials in the flow stream, to prevent them from collecting in the gate's body
Stainless steel liners protect the gate’s seals from material flow
No pinch points or exposed moving point for safety
Horizontal or vertical orientation
Narrow profile for limited space applications
Gravity flow & dilute phase pneumatic conveying applications. Can handle differential pressures up to 15 psig | 1 barg | 0.1 MPa, depending on gate size. Can be used in pressure or vacuum systems.
Non-abrasive to moderately abrasive powders, pellets and granules. Modifications available for handling corrosive materials and/or for wash-down.
6 – 16 in | 150 – 400 mm
Available in round sizes. Square, round or rectangular mating flanges are available.
4 – 8 in | 95 – 200 mm
55 – 180 lb | 25 – 80 kg
Standard stud bolt pattern, ANSI #125/150, DIN PN10, JIS 10, Custom flanges are available
250°F | 120°C for standard gate
Material Contact Options
304 or 316L stainless steel
Pressure Plates Option
Load Seal Construction
Double-acting air cylinder, hand wheel/crank, chain wheel, electric actuator
Magnetic reed, proximity or mechanical limit switches, and/or clear bonnet cover for visual indication
Material Flow Controls
AVP, IVP, VPO, VPC
Sealed body air purge
Special Service Inlet
ATEX Zone 20 (internal), ATEX Zone 21 (external), FDA
Material/metal contact is 316L stainless steel.
The gate inlet and outlet have 10 gauge flanges with bolt pattern to match a 125/150# ANSI bolt pattern.
Gate blade is electro-polished. Polyethylene (PET or UHMW) pressure plate seals are used to replace nylon.
*Additional modifications available based on application.
Vortex Clear Action Gate vs. Alternatives
• Many alternative slide gates and butterfly valves rely on soft rubber seals which are directly exposed to the material flow stream. These seals rapidly erode or tear away in service. Others rely on bonnet packing, which can relax and allow material packing in the seals. These deficiencies promote leakage of materials and dusts past the gate and toatmosphere, in addition to actuation issues and several other maintenance concerns. The Vortex® Clear Action Gate™ addresses these issues by incorporating "live loaded" hard polymer pressure plate seals. Hard polymer provides greater wear resistance and longer service life than alternative sealing materials. The hard polymer seals are "live loaded" with compressed rubber backing to ensure even as the polymer experiences frictional wear from many actuations over time, the rubber load seals continuously force the polymer seals against the blade. The seals are also shielded from the material flow stream, to protect them from abrasion. This design maintains the gate's positive seal of materials/dust-tight seal with infrequent maintenance intervention.
• Many alternative slide gates allow metal-on-metal sliding, which creates galling. This causes a gate to seize and bind, and can create foreign metal fragment contamination. The Clear Action Gate's hard polymer seals eliminate metal-on-metal contact to resolve each of these concerns.
• Many alternative slide gates and butterfly valves have open cavities where materials can wedge and prevent positive material shut-off. Wedging can also create seal wear and material degradation, and cause a gate to seize and bind. Wedged materials also create risk for cross-contamination and spoilage. To prevent wedging and ensure positive gate closure, the Clear Action Gate's machined, square-edged blade is designed to mechanically clear materials away from the sealing surfaces with each closing stroke. This ensures migrant materials are forced back out of the seals and are discharged into the process line, rather than packing in the seals and causing actuation issues.