8/18/2023 0 Comments Pneumatic conveyorSeek a conveying company experienced with your particular material’s flow characteristics in order to engineer around these types of issues. They’re simple, automatic, and achieve high rates without an airlock. Depending on the needs of the customer we’ll use a rotary valve but often we can save our customer installation and maintenance costs of system ownership by recommending a much simpler cycling loader a.k.a. Often, we can engineer around the need for a rotary valve altogether. It is in their interest to sell as many of them as possible. Sales and repair of rotary valves are up to 30% of some large pneumatic conveying companies’ revenue. Often you’ll need two so that one airlock can be in use while the other is being repaired. Eventually, the pressure drop is too great and plugs occur. Airlock Valves wear out, plain and simple. Air leakage through the blade tip clearances can generate high-velocity flows, which will entrain fine particles, and the resulting erosive wear can be far more serious than abrasive wear. These problems get worse over time as the vanes get worn down by material entrained in the Blowby Air. This “Blowby Air” can also cause bridging of material in the bin above, causing a no-flow scenario. This causes “blowby air” to flow across the pressure differential and the pressure loss among other resulting issues must be accounted for. They’re often used as an “airlock” valve but they don’t quite lock the air between the pressure and vacuum zones of the system. Rotary valves are the main way we meter material and separate the pressure/vacuum zones in a system at the same time, but they don’t do either perfectly. They’re expensive and have inherent issues that must be dealt with. Many times an “airlock” valve is the right component for the application – but not always. The Good, The Bad, and The Ugly of Rotary “Airlock” Valves US Systems has talented automation engineers on staff and we manufacture our own controls so that we have full control over every aspect of the system. Programmable Logic Controllers (PLC’s) are utilized on more complex installations. The panel typically uses electricity but we’ve developed pneumatic logic controls for applications where electricity is unavailable or undesirable. This panel starts the blower, receives information from sensors, and times the operation of the equipment to achieve high rates. The ‘brains’ reside in the industrial control panel. A control panel to control and automate functions of the system.Filtration system to separate the solids from the gas (air) at the end of the system (bin vent).Discharge point (often a vessel, silo, truck, railcar, or process).Sealed convey line from intake point to discharge.Blow Pot (temporary vessel that feeds material into the line).Conveying line from intake point containing material (header).The basic components of a pneumatic conveying system: It’s a collection of components working in concert as a system. It’s important to understand that “pneumatic conveyor” is not a single component. Other applications include intermodal/transloading, in-plant transfer, dust control, and portable solutions. Pneumatic Conveying is a cost- and energy-efficient method of transporting dry bulk materials such as powders and granules from one place to another.Ī typical example of a pneumatic conveying system that we engineer and manufacture involves conveying a material (such as polymer, lime, soda ash, plastic pellets/powder, dry milk etc.) from a railcar or truck to a silo (or vice versa) in a sealed pipe or tube.
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