Want to solve a troublesome valve installation once-and-for-all?
Roto-Disc totally open:
Material falls unobstructed through the inlet opening. Nothing is in the flow stream to cause product bridging, so you get the full flow capacity of the valve. Notice that the sealing surfaces are protected from direct contact with material.
As the valve begins to rotate closed, the dome wipes against the seat, cutting off the flow of product and pushing material above or below the valve instead of wedging it between the dome and seat. The design naturally resists abrasive wear and there are no pinch points or places for material to hang-up.
Roto-Disc fully closed:
Closure is clean and the valve is fully seated. The dome and seat form a positive seal that eliminates leakage across the seat. Double O-rings prevent leakage through the stems.
Troublesome valve installations can cause “off spec” product, require constant maintenance and restrict production time. Other valve styles, some of them originally designed for liquid handling, have shortcomings, as shown below.
Ball valves were developed over a century ago for liquids and gasses. They are heavy and take up a lot of headroom. More importantly they have a dead space between the casting and ball that can fill and pack with product causing abrasive wear on the seals and ball or causing cross contamination/spoilage between batches.
Butterfly valves have a vane in the center of the flow stream that can cause bridging and obstruct product flow. Since the seat and the vane are exposed they can wear quickly, making them unable to seal.
Roto-Disc® valves handle a wide range of dry and slurry material in many different applications. Here is just a sample of the many diverse valve installations:
|General Chemical||Potassium Tantalum||Isolation Valve|
|General Chemical||Silica Gel||Dense Phase Pneumatic Conveying|
|General Chemical||Hydro Bromine Salts||Line Shut-off|
|General Chemical||Zinc Stearate||Reactor Fill/Shut-off|
|General Chemical||TiO2||Silo Discharge|
|Alternative Energy||Crumb Rubber||Lock-hopper Valves|
|Diversified Food||Cake Frosting||Mixer Discharge|
|Diversified Food||Maltodextrin||Control Valve|
|Major Pharmaceutical||Pharmaceutical Powder||Vacuum Dryer Discharge|
|Major Pharmaceutical||Pharmaceutical Powder||Centrifuge Discharge|
|Aggregate & Mining||Aluminum Silicate Powder||Silo Discharge|
|Agricultural Processor||Poultry Biocide||Nauta Mixer Discharge|
|Agricultural Processor||Corn Gluten||Weigh Bin Fill|
|Batteries||Magnesium Dioxide||L.I.W. Feeder Refill|
|Bio-pharmaceutical||Dried Milk Formula||Air Lock (Double-dump)|
|Coal Fired Power Plant||Hot Fly Ash||Bag House Discharge|
|Flavorings & Spices||Powdered Flavoring||Mixer Discharge|
|Flavorings & Spices||Salt & Seasoning||Ribbon Blender Discharge|
|Petrochemical||Polyester Chips||Reactor Fill/Shut-off|
|Petrochemical||Plastic Pellets||L.I.W. Feeder Refill|
|Glass Products||Glass Batch||Hopper Discharge|
|Hazardous Materials Recycling||Broken Glass||Roaster Inlet & Discharge|
|Plastic Pellet/Resin||ABS Powder & Pellets||Box Filling|
|Nuclear Fuel Reprocessing||Uranium Pellets||Air Lock (Double-dump)|
|Nuclear Waste Processing & Disposal||Uranium Oxide Powder||Air Lock (Double-dump)|
|Oil Field Services||Deep-sea Drill Cuttings||Dense-phase Conveying|
|Pigments||Color Pigments||Nauta Mixer Discharge|
|Specialty Chemical||Ceramic Balls||Air Lock (Double-dump)|
|Specialty Chemical||Sulfamic Acid||Reactor Fill/Shut-off|
|Powdered Metals||Metallic Brake Shoe Fibers||Mixer Discharge|
|Powdered Metals||Titanium Sponge||Air Lock (Double-dump)|
|Original Equipment Manufacturer||Activated Carbon & Polymers||Mixer Discharge|
|Original Equipment Manufacturer||Cigarette Additive||L.I.W. Feeder Refill|
|Pet Food||Cat Food||Hopper Shut-off|