Chapter 3: Functional Description
3-1 Operational Summary
Once the control switch(s) is turned on, the SVL loader uses a solid state sensor to determine if material is needed at the material destination (hopper, bin, sight glass, etc.) If the sensor “sees” material, the loader will remain in an “at rest” mode with its solenoid
Once the material level drops (typically due to process consuming material) and the SVL sensor no longer “sees” material, the solenoid is energized, turning on the supply of compressed air to the venturi. The sensor is in a “closed state” to convey material and an “open state” to signal a high level condition.
The venturi is located near the material supply and creates a vacuum on its inlet by the rapid rush of compressed air through it. This vacuum pulls on the material source and begins a flow of material through the venturi. Once inside the venturi, the material is then ‘pushed’ by the compressed air through the flex hose, towards the loader.
Once inside the loader, the compressed conveying air is separated from the conveyed material by a combination of gravity, and the filter located on top of the loader. Material and dust will stay inside the filter and conveying air will exhaust through the filter to atmosphere. Unless the material being conveyed is sticky or wet, the material will fall away from the filter surface and join other loaded material in the destination hopper or machine throat.
The compressed air energy of the SVL will remain on and material will flow until the demand sensor of the SVL once again “sees” material. At this time the sensor will determine that the material level is satisfied and
Note: The