Limitations of Rotary Valve and how to select the ideal Rotary Valves?

Rotary Airlock Valve, are rotary feeders to maintain the pressure and optimize airlock seal between conveying transitions.  It is an essential part that helps in prevention of air loss for adaptable temperature and pressure systems consistently used in conveying systems.

There is numerous feasibility application related with the Rotary valve for both pressure and vacuum types where it defines as just a metering means to control the feed rate. Although with such a widely understood process and apparently simple design and working, the rotary valves have troubleshooting concerns when applied with wrong selection process.

It is a consistently simple designed mechanical device which helps in discharging particles or substances under gravity flow. Can be termed as a controlled feeder device, several functions like

  • Fixed or variable flow rate ordering
  • Maintaining airlock pressure
  • Application as an Explosion barrier and flame barrier
  • Employed for process isolations

There are limitations too, a rotary valve is restricted to only pass product onto with respect to the gravity, but it can’t employ creation of product flow. Also, there is leakage though whatsoever prevention measures are taken during the operability of the system. Efficiency concerns also mark depending upon the rotor speed.

Selection Criteria

Performance oriented selection:

Depending upon the sizes, throughput rate, product density, flow characteristics and other factors, the rotary valve can be influential over the valves throat size, concerned air/gas leakage and other functional parts.

Filling efficiency concerns are resulted with the choice of valve sizes and speed that makes variability for product flow and system conditions more immutable accordingly. Valve sizes yield speed related calculations, empirical data and other judgment based on experienced product handling.

Product characteristics:

Productive design and construction of individual components dictate the handling characteristics within the valve. Materialistic concerns like abrasive outcome of material during high velocities and air leakage contact can yield erosion of surface of valve. Valves have to be matched with multiple characteristics of products to be handled in like toxicity, non friable, abrasive, sticky, biologically sensitive, and many other industry specific requirement that have challenging characteristics.

System Duty Requirements:

Valve configurations, material of construction, these physical concerns also make selection criteria more efficient with correctness. Flange details with respective drilling options with inlet and outlet concerns, choosing housing body and End covers, drive & venting arrangements should be considered for relative physical installations.

Pressure differential measures also make up a vital consideration for if any greater differential if yield can yield to leakage orientations from the valve. High leakage concerns can significantly reduce material flow, and can enhance abrasiveness for hard fine particles, and yield moisture.

Rotary valves should be less prone to gravity that can hold on to its power and operate well irrespective of gravity concerns. Leakage concerns should be made enact so that the performance orientation can be efficient. Rotary speed must be as such that it can mitigate with diverse speed operations to yield correct filling efficiency.

Trimech Rotary valves are fabricated with heavy duty castings precisely drawn with consistent tighten clearances for industry specific pneumatic conveying, dust control, and flow control applications. With fascinating 8years in technical excellence, Trimech India is among the leaders in manufacturing and supply of Air Gas equipments like valves, and other material handling equipments.

Enhance your industry specific needs with Trimech India; get an immediate assistance from our group of expertise for industry concerns.

Quick Contact Us
We welcome any feedback, questions or comments