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Acquire™ is a trademark of Ambrit Ltd

Setting up a Control Valve

Acquire must be in Config mode to perform these steps.

1. Select ‘P&ID’ from the ‘Acquire’ menu

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2. Select ‘Pallet’ from the ‘P&ID’ menu

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3. Select ‘Valves’ from the ‘Devices’ popup menu

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4. Drag the Control Valve from the pallet onto the P&ID

The Valve Properties window will be displayed:

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5. Enter the fields as follows:

Valve Position This is the position of the valve. Zero is closed, any value greater than zero is open.
PID Mode This field indicates which parameter should be used to control.Set the value of this field to be:
1 – Flowrate
2 – Inlet Pressure
3 – Outlet Pressure
Control Mode This field indicates whether the field is in manual or automatic mode.Set the value of this field to be:
1 – Manual
2 – Automatic
Flowrate Value This is the measured flow rate field.
Flowrate Setpoint This is the flow rate setpoint that should be maintained while the valve is in automatic mode. This field is not used if the mode is automatic.
Flowrate Maximum This is the maximum flow rate.
Flowrate Minimum This is the minimum flow rate.
Inlet Pressure Value This is the inlet pressure field.
Inlet Pressure Setpoint This is the inlet pressure setpoint that should be maintained while the valve is in automatic mode. This field is not used if the mode is automatic.
Inlet Pressure Maximum This is the maximum inlet pressure.
Inlet Pressure Minimum This is the minimum inlet pressure.
Outlet Pressure Value This is the outlet pressure field.
Outlet Pressure Setpoint This is the outlet pressure setpoint that should be maintained while the valve is in automatic mode. This field is not used if the mode is automatic.
Outlet Pressure Maximum This is the maximum inlet pressure.
Outlet Pressure Minimum This is the minimum outlet pressure.
Valve Percentage Open This is the position of the valve.
Valve Keypad Percentage Open This is the keypad position of the valve.

6. Double click on a field in the list

The Field List window will be displayed:

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7. Select the field that represents the field

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8. Click the ‘OK’ button

This Field List dialog will close and the field will be selected.

9. Repeat steps 6-8 for each field in step 5

10. Tick the ‘Screen’ checkbox

The control valve screen for the selected stream will be created.

11. Click the ‘OK’ button

The control valve will be added to the P&ID:

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11. Select the Control Valve on the P&ID

12. Click the ‘Details’ button in the sidebar

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Measured Chart This chart gets its title from the P&ID Mode field. The chart is plotted as (value – min) / (max – min) between the min and max limits.The value plotted is based on the P&ID Mode.
1 – Flowrate
2 – Inlet Pressure
3 – Outlet Pressure
Setpoint Chart This chart gets its title from the P&ID Mode field. The chart is plotted as (setpoint – min) / (max – min) between the min and max limits.The setpoint value plotted is based on the P&ID Mode.
1 – Flowrate
2 – Inlet Pressure
3 – Outlet Pressure
Valve Position This chart is plotted based on the control valve’s Valve Percentage Open field. This is a percentage between 0 and 100%. Zero is open and greater than zero is open.