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The Vortex® Handslide Gate™ is designed specifically to handle dry bulk solids in gravity flow conveying. A full flow orifice provides unrestricted conveying of material with no disk or ledges to impede flow or cause material bridging. The gate seat and live-loaded seals are protected from material flow by a metal insert. By design, the valve “self cleans” material from the seat on each stroke of the valve blade improving overall seat life.

Ideal application: Manually operated process gate, used to control flow on the inlet/outlet of hoppers, bins or totes in applications where powered gates are not feasible or desired.

Key Features

  • Displacement area as an alternative to packing materials into an end seal

  • Live loaded, wear compensating hard polymer pressure plate seals

  • Shimming system for in-line maintenance

  • Optional locking pin to secure the blade in the open or closed position

  • "Scissoring" action reduces seal wear and minimizes material shearing

  • Stainless steel liners protect the gate’s seals from material flow

  • Mechanically self-cleans its seals on the opening stroke, if actuated to full-open

  • No internal cavities to prevent wedging, lodging & spoilage

  • Flange options to match up with equipment above and below the gate

Side shot of material displacement
Displacement area as an alternative to packing materials into an end seal
Side shot of a live loaded seal.
Live loaded, wear compensating hard polymer pressure plate seals
Handslide shimming for in-line maintenance.
Shimming system for in-line maintenance

Tech Specs

Model No.


Conveyance Type

Gravity flow only. Contact us to discuss suitability for use in low pressure/vacuum applications.

Materials Handled

Non-abrasive to moderately abrasive powders, pellets and granules. Modifications available for handling corrosive materials and/or for wash-down.

Standard Sizes

2 – 14 in | 50 mm – 355 mm
ID & OD diameters are available.
Also available in schedule 10, 20 or 40 pipe sizes.


Available in round sizes.

Overall Height

2 -3 in | 90 – 120 mm


10 – 95 lb | 5 – 45 kg

Flange Options

ANSI & Standard stud bolt pattern
Modified pipe flanges available

Material Temperatures

180° F | 80° C for standard gate, with modifications that allow up to 400° F | 205° C

Body/Frame Construction


Material Contact Options

304 or 316L stainless steel

Pressure Plate Options

Nylon, PET, UHMW-PE, 25% glass-filled PTFE, molybdenum disulphide-impregnated nylon

Load Seal Options

Natural rubber and/or silicone rubber


Push-pull handle

Other Options

Special Service Inlet


ATEX Zone 20 (internal), ATEX Zone 21 (external), FDA



Material/ Metal contact is 316L stainless steel.


Mounting studs are removed and special mounting holes matching an ANSI pattern are provided for bolting through the gate flange. Not all holes are able to be used.


Modifications are made allowing 250 F (121 C) continuous to 300 F (149 C) intermittent service.


Modifications are made allowing 400 F (204 C) continuous to 450 F (232 C) intermittent service.


Gate blade is electropolished. Polyethylene (PET or UHMW) pressure plate seals are used to replace nylon.

*Additional modifications available based on application.


Options for the Vortex Handslide Gate. 1. Single Handle, 2. Double Handle.

Power of Comparison

Vortex Handslide Orifice Gate vs. Alternatives

The Vortex® Handslide Gate™ is a highly versatile solution. It is often used in applications where air supply is not available, in filling applications where iris diaphragms are not feasible, or as a cost-eective alternative to using powered process gates in low actuation applications.

• Iris diaphragms are limited in scope, compared to the Handslide Gate. Because iris diaphragms feature a fabric sleeve, most are designed to handle bulk densities < 40 lb/ft. Because the Handslide Gate features a solid sliding blade, it is well-designed for handling bulk densities above that threshold.

• The fabric sleeve of an iris diaphragm is not designed to handle corrosive materials. Oppositely, the Handslide Gate's material contact areas are constructed from stainless steel to provide appropriate corrosion resistance.

• The fabric sleeve of an iris diaphragm is not designed to seal against fine materials. The Handslide Gate's solid sliding blade and hard polymer pressure plate seals provide a positive seal of materials across the gate and to atmosphere.

• It is not recommended to close an iris diaphragm through a flowing column of material. Doing so can cause wear and potentially break the diaphragm's internal control ring. The Handslide Gate's solid sliding blade is durable, allowing it to be closed through a flowing column of material.

• Many alternative slide gates 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 to atmosphere, in addition to actuation issues and several other maintenance concerns. The Handslide 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.

• If the pressure plate seals have partially worn and the compression load is lessened, slight dusting may be present along the push-pull handle. With this maintenance indication, the Handslide Gate's shimming system can be utilized to restore the gate's dust-tight seal. Unlike alternative valves, which require spare parts be kept on-hand for seal maintenance, the Handslide Gate requires removal of parts. By simply loosening the nuts along the lateral aspects of the gate, shim(s) can be removed from each side and the nuts retightened to restore the pressure plate seals' compression load. This maintenance process can be performed while the gate remains in-line, and can be repeated several times before the shims and pressure plate seals must be replaced.

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