Plattco Corporation
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Double Flap Airlock® Valves
H-Series / Premiere Valve
R-Series / Radial Valve
S8-Series / Low Profile Valve
    Product Features
    Plattco’s Mechanical Seal
    Specifications & Drawings
    3D Valve Demonstration
    Product Sheet (PDF)
PCV-Series / Pollution Control Valve

Slide / Isolation Gates
T-Series / High-Cycling Gate
U-Series / Maintenance Gate

Materials / Applications
Success Stories
Capacity Chart (PDF)
Product Installation Manuals
Complete Product Catalog (PDF)



“The rotary valve vanes used to pack with dust and foreign objects and not convey material very well.

“Plattco valves do not experience these plugging problems... eliminating the constant vane adjustment maintenance necessary with the rotary valves.”

[read more]     

Plattco’s Double Flap Airlock® Valves
Solving material handling problems that no other valve can.

S8-Series / Low Profile Valve

Specifications & Drawings

Maximum Material Temperature 1800° F
Maximum Differential Pressure 15 psi (above & below the valve)
Inlet / Outlet Sizes 6, 8, 10, 12, 16, 18
Capacity Expanding Spool Pieces 2 - 24 (inches high)
Operators Pneumatic
Rotary Actuator
Valve Body Materials Cast Iron
Cast Steel
Stainless Steel
Seat & Flapper Materials Ni-Hard
Plattalloy 650
Stainless Steel
Seat & Flapper Design Classic
Knife Edge
Shaft Seals Standard Graphite Packing
Lantern Rings
Mechanical (patented)


Capacity Chart / S8-Series
   Size Height (inches) Cubic Feet / Hour
   6” 14.063 17 cfh
   8” 16.063 34 cfh
   10” 20.063 66 cfh
   12” 24.063 104 cfh
   16” 32.125 160 cfh
   18” 36.125 250 cfh

The 6” - 12” capacities are based on standard 6x per minute cycle. For 16” and larger valves, the cycle is 4x per minute. A spool piece or dutchman can be added to increase capacity. Click here for our complete Capacity Chart.





S8-Series Valve

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3D valve demo


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S8-Series Illustration
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Plattco Corporation is the recognized leader for valves that solve material handling problems in a wide variety of industries. Plattco specializes in the design and manufacture of Double Flap Airlock® Valves and associated multi-purpose slide gates as an important part of dry material handling systems.

Industries / Applications For demanding conditions, Plattco valves are the ideal choice when you need a seal that performs, including Precipitator, Baghouse, Clinker Cooler, Cyclones, Ash Handling, Air Heater Hopper, Burner Chute, Bulk Handling, CFB Boiler, Dust Collector, Grinding Mill, Kiln, Preheater Hopper, Pneumatic Conveying, Screw Pump Replacement, Spritzer Trap, Vacuum Systems, Filter Receivers, Classifiers, Alternate Fuel Feed Airlock, Storage Silos, Cooling Towers, Air Slides, Conditioning Towers, Coal Mill Feeder, Construction, Boiler Feed, Coal-fired Power Plants, Fluid-bed Boiler Discharge, Pressure Transport Systems, Waste to Energy, Positive Pressure Conveying Systems, ESP Valves, Dust Collection, Superheaters, Scrubber Discharge, Boiler Bypass, Higher Temperature, Kiln Cyclone Airlocks, Reactor Valves, Energy & Incineration, Mining, Pollution Control, Environmental Systems, Recycling, Gasification.

Materials / Media Plattco built its reputation on reliable, resilient valves that tackle the toughest conditions. If you have a highly-abrasive, high-temperature material, there is no better choice than Plattco. We have more than 50 years experience handling Aggregate, Alumina Chips, Alumina Powder, Alumina Rocks, Animal Feed, Asphalt, Glass Beads, Metal Beads, Plastic Beads, Broken Glass, Bulk Powder Solids, Carbon Ash, Casting Sand, Cement, Finish Cement, Raw Cement, Dry Chemicals, Clinker Dust, Coal, Coal Dust, Concrete, Corn, Crushed Glass Dust, Fiberglass Dust, Fiberglass Granules, Fly Ash, Foundry Sand, Glass Furnace Dust, Graphite, Gypsum Rock, Gypsum Pellets, Kiln Dust, Lead, Lead Chips, Lead Powder, Metal Powders, Metal Shavings, Minerals, Paper Pulp, Quarry Dust, Rocks, Silica, Soybeans, Soy Flour, Stone, Stone Dust, Styrofoam, Talc, Tungsten Carbide, Waste Material, Wheat, Wood Chips, Wood Dust.

Equipment / Industry Terms With the number of products Plattco carries and the industries we serve, there are various terms which may apply, including: Double Flap Gate Valve, Double-Flap Airlock® Valves, Double Dump Valves, Airlock Valves, Plattco's, Industrial Valves, Metal Valves, Air Valves, Double Flap Airlock Valves; as well as, Material Handling Gates, High-Cycling Gates, Isolation Gates, Maintenance Slide Gates, Gate Valves, Knife Gates, Knife Gate Valves, Slide Gates, Slide Valves, Low Profile Gates, Multi-purpose Gates and Feeder Gate Valves.

To determine the ideal Plattco valve for your demanding conditions, contact us today.