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Startup

Source: DICE IOM Manual V12E, Pages: 18–23
The module is internally pressurized and handles hazardous chemicals. Use appropriate PPE: protective gloves, glasses, and clothing. Refer to the MSDS for all fluids used.
If valves were factory preset (labeled with target pressure), skip the adjustment procedures and proceed to calibration.

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Pump Priming

The bleed valve (32) on the left side of the DICE module helps evacuate trapped gas between the pump outlet and back pressure valve.
DICE module showing bleed valve (32) on left side

Bleed valve location on DICE module

1

Start the pump

Begin pump cycling while observing for flow.
2

Open the bleed valve slightly

Partially unscrew the bleed valve (32) until fluid begins passing through. Only slight opening is needed—do not fully unscrew.
3

Close the bleed valve

Once fluid flows, close the bleed valve and proceed with setup.
The bleed valve can also assist if the pump loses prime during normal operation.

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Pressure Relief Valve Adjustment

DICE module showing adjustment screw (19) and counter nut (20)

Pressure relief valve adjustment components

1

Close all ball valves

Set all three (DS) or four (DM) ball valves to the closed position.
2

Pre-load the back pressure adjuster

Screw the back pressure adjustment screw (19’) completely in (clockwise).
3

Start the pump

Run the pump until fluid passes through the pressure relief valve into the evacuation port.
4

Set the pressure relief set point

Use adjustment screw (19) to obtain the desired relief pressure. Clockwise increases the set pressure.
5

Lock the setting

Tighten counter nut (20). Max torque: 35 in-lb.
6

Depressurize

Stop the pump and slowly open the evacuation ball valve to release system pressure.

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Back Pressure Valve Adjustment

DICE module showing adjustment screw (19') and counter nut (20')

Back pressure valve adjustment components

1

Set valve positions

Close the evacuation and calibration column valves. Open the injection valve.
2

Start the pump

Run the pump until fluid passes through the back pressure valve.
3

Set the back pressure set point

Initially unscrew adjustment screw (19’), then adjust to desired pressure. Clockwise increases the set pressure.
4

Lock the setting

Tighten counter nut (20’). Max torque: 35 in-lb.
Set back pressure to 20-30 psi above process pressure for optimal check valve operation and siphon prevention.

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Dosing Pump Calibration

Complete back pressure and pressure relief valve adjustment before calibrating the pump.
1

Set valve positions

Close the evacuation valve (3) and injection valve (1). Open the calibration column valve (2).
2

Perform calibration

Follow your dosing pump manufacturer’s calibration procedure using the calibration column.
3

Drain the calibration column

Open the evacuation valve (3) to empty the calibration column. Vent the top of the calibration column to enable complete drainage.
4

Return to injection mode

Close the evacuation valve (3) and calibration column valve (2). Open the injection valve (1).

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DS Valve Positions

The top of the calibration column must be vented to atmosphere to enable gravity drainage through the evacuation valve.

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Post-Startup Verification

1

Verify pressure

Confirm the pressure indicator reads the back pressure set point.
2

Check for leaks

Inspect all connections for leaks.
3

Confirm valve positions

Verify all ball valves are in the correct position for normal operation.
4

Document set points

Record the set points for future reference.
If the pressure indicator does not show the expected back pressure reading, refer to Troubleshooting.

DICE DS — Suction Lift

1/2” module for suction lift applications

DICE DM — Flooded Suction

1/2” and 1” modules for flooded suction

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Sources

DICE IOM Manual V12E

Pages 18–23 • July 2022