Toptech Systems MultiLoad II User Manual

Chapter 5 – Product Flow Control
172
Firmware Version 3/4.31.37
5.2 SINGLE PRODUCT DELIVERY
The following discussion pertains to a load arm that loads a single component. There are five stages that occur
while product is flowing.
- Low Flow Start
- High Flow
- 1st Stage Trip
- 2nd Stage Trip
- Final Trip
The digital control valve is the key component of the meter run. The MultiLoad II makes adjustments to the valve
based on feedback from the flow meter. The flow profile illustrated below shows how each stage progresses
throughout a load.
Pump Start Delay
Flow Start Delay
D E L I V E R E D Q U A N T I T Y
Final
Trip Vol
Preset
Qty
2nd Stage
Trip Vol
2nd Stage
Trip Rate
1st Stage
Trip Rate
High Flow Rate
1st Stage
Trip Vol
Low Flow
Start Rate
Low Flow
Start Vol
Start
100
200
300
400
500
600
F
L
O
W
R
A
T
E
Flow Profile Single
Product Delivery
High Flow
Start Vol
Block Valve
Delay
Pump Stop
Delay
Figure 5.2 Flow Profile for Single Product Delivery
The load begins in the Low Flow Start stage. When the Start button is pressed, the control valve opens and the
flow rate ramps up from zero to the Low Flow Rate. Both the normally open (Upstream) and normally closed
(Downstream) solenoids of the digital control valve are energized, causing the control valve to open. If sufficient
pressure is available, the Low Flow rate should be achieved in seconds. When the flow rate rises to within the
Low Flow Dead Band Rate, the normally closed (Downstream) solenoid of the control valve will de-energize. This
action locks the valve in position in order to maintain the desired rate.

Toptech Systems MultiLoad II Specifications

General

Brand	Toptech Systems
Model	MultiLoad II
Category	Control Unit
Language	English