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In most bulk powder handling applications, sliding doors are mainly used to fully close or fully open the material flow. In some cases, it may be necessary to limit the amount of material allowed through the gate. When controlling the flow of dry bulk solid materials, different controls can be used to measure the volume and flow rate.
Flow control is a component that can be added to pneumatic actuators to help control material flow. Pneumatic actuators are more cost-effective than electric actuators and can quickly reposition the blade. Pneumatic actuators are composed of cylinders, pistons/diaphragms, rods and valve stems, and can also be modified to include material flow control devices to help provide accurate material metering.
Whether filling small bags and/or containers or filling trucks on a scale, the implementation of material flow control and accessories can improve accuracy through precise batch weight calculations. Other benefits include reduced filling time between workstations and flow control when processing immersable materials that can be filled quickly.
The most commonly used and customizable material flow control component is AVP, so it is the most common option for material flow control. Unlike other options, AVP can control the flow of opening and closing strokes. AVP is a very cost-effective option that provides high precision positioning up to 3/16 inches.
AVP can accommodate many intermediate positions. The number of intermediate positions is determined by the number of reed switches mounted on the (pneumatic) actuator. The number of AVP intermediate positions is only limited by the size of the reed switch, the available space along the lever of the pneumatic actuator, and ensuring that the sensing range of the reed switch does not overlap. AVP requires a programmable logic controller (PLC).
In contrast to other material flow control options, IVP allows full control of the variable positioning of opening and closing strokes. IVP relays blade position feedback along the entire stroke of the blade by using linear output sensors. One of the main advantages of IVP â????s instant feedback capability is that the door can be moved to any position at any time.
The control box or PLC is used to operate the gate, which can be manually operated on the valve or synchronized with the PLC to realize automatic operation. The variable position of IVP
