Surge Valve Attributes

ID: Unique identifier assigned to this element.
Label: Descriptive label for this element.
Notes: Additional information about this element.
GIS-IDs: List of associated IDs on the GIS/data-source side.
Hyperlinks: Associate one or more web link, photo, word processing document, or other file with this element.
Diameter (SAV): The valve's characteristics are determined by its Cv and type, so that the diameter is only used for descriptive purposes.
Threshold Pressure (SAV): Pressure below which the SAV opens.
Time for SAV to Open: Time for the SAV to open fully after being triggered.
Time SAV Stays Fully Open: Time that SAV remains fully open (i.e., time between the end of the opening phase and the start of the closing phase).
Time for SAV to Close: Time for the SAV to close fully, measured from the time that it was completely open.
Discharge Coefficient (when SAV Fully Open): Discharge coefficient, Cv, is defined as: Flow / (Pressure Drop) ^ 0.5.
Threshold Pressure (SRV): Pressure above which the SRV opens.
Diameter (SRV): The diameter of the SRV.
Spring Constant (SRV): Change in restoring force of the return spring per unit lift off seat. A possible value is 150 lb/in. (26.27 N/mm).
SAV / SRV Type: Choices: Surge Anticipator Valve, Surge Relief Valve, Surge Anticipator & Relief Valve
Valve Type: Choices: Needle, Circular Gate, Globe, Ball, Butterfly
SAV Closure Trigger: Choices: Time, Threshold Pressure
Elevation: Elevation at centroid of junctions, valves, and pumps; the ground elevation at tanks; the hydraulic grade at reservoirs.
Trace (Initial): Specify the initial trace amount at the current location.
Zone: Specify the zone for the element.
Concentration (Initial): Specify the initial concentration for the global concentration at the selected element.
Is Constituent Source?: If true then the selected node can inject a set concentration of the global constituent into the system.
Pattern (Constituent): Specify the pattern which dictates how the injected constituent concentration varies over time.
Constituent Source Type: Choices: Concentration, Flow Paced Booster, Setpoint Booster, Mass Booster
Concentration (Base): This data field allows you to specify the corresponding constituent concentration at this node over time.
Mass Rate (Base): This data field allows you to specify the corresponding constituent mass rate at this node over time.
Age (Initial): Specify the initial age of the fluid at the selected element.
Pressure: Calculated pressure at node.
Pressure Head: Calculated pressure head at node.
Hydraulic Grade: Calculated hydraulic grade at node.
Age (Calculated): Age at selected element for current time step.
Trace (Calculated): Trace at selected element for current time step.
Concentration (Calculated): Concentration at selected element for current time step.
Has Calculation Messages Now?: If true then the current element has associated calculation warning messages for the current time step.
Head (Maximum, Transient): Maximum head at node over the course of the transient simulation.
Head (Minimum, Transient): Minimum head at node over the course of the transient simulation.
Pressure (Maximum, Transient): Maximum pressure at node over the course of the transient simulation.
Pressure (Minimum, Transient): Minimum pressure at node over the course of the transient simulation.
Air Volume (Maximum, Transient): Maximum air volume at node over the course of the transient simulation. Not applicable to Reservoirs and Rating curves.
Vapor Volume (Maximum, Transient): Maximum vapor volume at node over the course of the transient simulation. Not applicable to Reservoirs and Rating curves.