All about our slide gates

TPI Designs, Manufactures, Procures and Installs many types of Slide Gates and Diverter Valves

Slide Gates and Diverter Valves

Slide gates and Diverter Valves are frequently required within the material stream to act as cut-off gates for intermediate discharge locations, to temporarily stop material flow for some maintenance function or to divert the material stream between two (or more) conveyors.

There are various types and styles of slide gates:

Hand Slide Gates are always “flat slide” style and are frequently used to block-off a rarely used intermediate discharge on a screw conveyor and drag conveyor. As the name implies, they are opened and closed by hand.

Hammer Gates are always flat slide style and a step up from Hand Slide Gates. They are used as is an inexpensive maintenance shut off valve above airlocks, screw conveyors and most other mechanical conveying equipment. As the name implies, these gates are driven open or closed with a hammer against a heavy metal block attached to the gate.

Rack and Pinion Gates can be flat slide or curved slide and are usually positioned below infrequently used intermediate discharges on screw conveyors or drag conveyors. They are operated by means of a hand wheel or chain wheel mounted on a cross-shaft that rotates a pinion gear against a flat rack gear.

  • Externally dust tight housings are an available option.
  • Actuated slide gates can be flat slide or curved slide and are usually positioned below frequently used intermediate discharges on screw conveyors of drag conveyors. They are remotely operated by means of either an air cylinder (for pneumatic actuation) or an electric linear actuator.
  • Externally dust tight housings are an available option.

Bin Valve Gates are always flat slide style with either pneumatic or electric actuation. They are designed to mount under a bin or hopper that could have a significant head load and are, therefore, much heavier duty that any of the above options. They may use cam followers (roller slide) to support the gate or guide rails. They may have more than one actuator and are almost always externally dust tight.

Pin/Rod Gates utilize round rods or shafts that push-in from the side to completely shut off material flow. Wide applications have rods coming in from both sides to meet-in-the-middle. The rods are slightly pointed to facilitate pushing thru a static column of material. The rods may be individually moved or could be in gangs of varying quantities.

Diverter Valves are all single blade style and are ideal for diverting gravity flow of materials when it is not critical to have complete sealing between the legs or where cutting through a standing column of material is not required. They are available as follows:

  • Straight-thru with a 45 degree single leg one side: the single in-feed chute continues straight through and a single discharge leg kicks out at 45 degrees.
  • Straight-thru with a 30 degree leg one side: the single in-feed chute continues straight through and a single discharge leg kicks out at 30 degrees (from vertical).
  • 45 degree “Pants Leg” diverter: the single in-feed chute splits into two discharge legs at 45 degree separation.
  • 60 degree “Pants Leg” diverter: the single in-feed chute splits into two discharge legs at 60 degree separation (30° each side of vertical).

TPI Engineered Systems is based in Douglasville, Georgia; serving as the premier designer, engineer, manufacturer, and installer of custom bulk materials conveyor systems all across the United States. For more information on any of the TPI Systems, call 804-232-4580 to speak to one of our knowledgeable and highly experienced employees.






We can design and build systems customized to handle:


  • Aggregates and Crushed Stone
  • Biomass, TDF & RDF
  • Cement & Clinker
  • Coal & Boiler Ash
  • Fertilizers & Phosphates
  • Fracking Sand
  • Fly Ash & Bottom Ash
  • Gypsum & FGD
  • Hogged Fuel
  • Iron Oxide & Millscale
  • Kaolin & other Clays
  • Limestone
  • Meat Scraps & Bones
  • OSB & Wafer Board
  • Paper Pulp & Sludge
  • Particle Board
  • Recycling & PET
  • Sand & Foundry Sand
  • Sewage Sludge
  • Sugar Cane, Sugar Beets & Bagasse
  • Talc
  • Urea
  • Wood Chips, Sawdust & Wood Shavings
  • And many others!

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