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Vortex offers material flow controls to meter the volume and flow rate. These accessories can improve accuracy with more precise batch weight calculations, reduce fill times between workstations, and control flow when handling floodable materials which fill very quickly.

Compatible products:

• Orifice Gate
• Roller Gate
• Clear Action Gate
• Titan Slide Gate
• Rounded Blade Gate
• Gravity Vee Diverter

Common applications include:

• Batching
• Metering into screw conveyors, mixers or blenders
• Dribble flow
• Loss-in-weight feeders
• Scaling operations
• Maintaining flow rates
• Truck and/or railcar loadout

Variable Position Open (VPO)

The VPO allows a gate to (Step 1) begin in the closed position, (Step 2) actuate into a variable position on the opening stroke, then (Step 3) either return to a full closed position or continue to the full open position.

However, the VPO is not backwards compatible – meaning if the blade is in the full open position, it cannot be actuated into a variable position on the closing stroke. Instead, it must first be actuated back to the full closed position before it can be reopened into a variable position.

The VPO also allows traditional full open-to-full closed actuation, and vice versa.

Technical Specifications:
• Infinitely adjustable pneumatic trip switch allows the intermediate position to be manually adjusted to operator preferences.

• Standard assembly allows for one intermediate position, with modifications that allow up to three intermediate positions. Contact us to discuss options

• Accuracy/repeatability: +/- 1/16” from set point Note: In the case of multiple set points, controls do not allow for modulation between set points

Variable Position Closed (VPC)

The VPC allows a gate to (Step 1) begin in the open position, (Step 2) actuate into a variable position on the closing stroke, then (Step 3) either return to a full open position or continue to the full closed position.

However, the VPC is not backwards compatible – meaning if the blade is in the full closed position, it cannot be actuated into a variable position on the opening stroke. Instead, it must first be actuated back to the full open position before it can be reclosed into a variable position.

The VPC also allows traditional full open-to-full closed actuation, and vice versa.

Technical Specifications:
• Infinitely adjustable pneumatic trip switch allows the intermediate position to be manually adjusted to operator preferences.

• Standard assembly allows for one intermediate position, with modifications that allow up to three intermediate positions. Contact us to discuss options

• Accuracy/repeatability: +/- 1/16” from set point Note: In the case of multiple set points, controls do not allow for modulation between set points

Adjustable Variable Positioner (AVP)

The AVP is the most common and customizable of the Vortex material flow control assemblies. It is often regarded as the most universal and cost-effective option for material flow control.

Unlike the VPO and VPC, the AVP can be used to control flow on both the opening and closing strokes. The AVP also allows more accurate positioning than the VPO and VPC.

Also unlike the VPO and VPC, which are limited in number of intermediate positions, the AVP can accommodate many intermediate positions. For AVP assemblies, the number of intermediate positions is dictated by the number of magnetic reed switches which are mounted to the pneumatic actuator. Therefore, the number of AVP intermediate positions is only limited by magnetic reed switch size, available space along the pneumatic actuator’s tie rods, and ensuring the sensing ranges of the magnetic reed switches do not overlap.

Required Accessories:
   • Programmable Logic Controller (PLC)
   • Pneumatic actuator with a magnetic piston
   • A three-position, spring-centered four-way solenoid valve

Note: Though the AVP is controlled using a PLC, intermediate position adjustments must be made manually at-the-valve by adjusting the magnetic reed switches.

Technical Specifications
   • Accuracy/repeatability: +/- 3/16” from set point

Inifinite Variable Positioner (IVP)

Unlike other material flow control options, the IVP allows total control of variable positioning on both the opening and closing strokes. Using a linear output transducer, the IVP relays blade position feedback along the entire stroke of the blade. With this immediate feedback capability, the IVP allows a gate to be moved into any position at any time.

The gate is operated using a remote control, which can either be manually operated at-the-valve or synchronized with a PLC to automate operations. Unlike other material flow control assemblies, the IVP’s variable positions are adjusted using technology, rather than making manual adjustments at-the-valve.

Required Accessories:
   • Linear output transducer and IVP remote controller

Technical Specifications
   Accuracy/repeatability:
    • Automated: +/- 2% of the blade’s total stroke
    • Manually controlled: +/- 4% of the blade’s total stroke

*Consult factory for specific information and configuration. **Custom configurations available

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