A gate valve with a triangular profile enables to combine low and high flow rates via gravity feed. It is mounted on the outlet of the silo, hopper or fuildized chute.
The triangular profile ensures precise dosing of raw materials via adjustment of the outlet size.
2 techniques can be used for dosing:
A mechanical stop system with a central actuator which opens or closes the valve or an auxiliary actuator which positions the low-flow stop.
A proportional valve system with an analog encoder: a pneumatic actuator controlled by an analog encoder with 4/20mA output.
Gate valves have the following assets:
- High precision dosing
- Low energy consumption
- Compact size (easy to mount)
- Less sensitive to abrasion
- The product passes through the valve directly thus eliminating the risk of retention and possible contamination