The Boundary Valves dialog is used to specify which valve types are to be used as bounding valves.
This specification happens in the following processes:
To display the dialog, click the Valves button on the Boundary Trace View, Isolation Trace View or Set Area Codes dialog.
Dialog Options
The options vary depending on whether you have a control data set open.
Note: If the Has Valve check-box is set to true in a
pipe to indicate the presence of a service valve, then tracing can be asked to stop at these service valves. Of course it is better to model a valve explicitly using a throttle valve or an open/close valve.
With Control Data
Each type of valve can be:
- never used as a boundary
- always used as a boundary
- only used as a boundary when the valve is closed
- any valve is considered closed if the Pipe Closed field is checked in its control data
- throttle valves (THV) are considered closed if they have a Percentage Opening value of zero
- pressure control (PCV) and flow control (FCV) valves are considered closed it they have an Initial Opening of zero and no associated control data object that can change this value
The settings for each valve can be changed independently. The default setting is that all valve types are boundaries if closed.
Without Control Data
Without a control data set associated with the network:
- the Closed option is unavailable
- the setting in the Always checkbox for all valve types from Throttled Valve down to Flow Modulating Valve (see picture) changes together. In other words, these valve types are either all included as boundaries, or all ignored.
- the default setting is that no valve types are used as boundaries