A Electrically Actuated Anticipation Valve (Elec-SAV) is a combination of regular SAV and Hyd-SAV, and requires one additional data item called Delay Time. It starts opening on pump trip condition (actuated by a solenoid), gets to stay open for a specified time period, and closes thereafter.  HPP opens the valve during upsurge when the pressure at the sensing node rises above the preset pressure and keeps the valve open until the pressure drops below the preset pressure.

Disable This Surge Protection Device

If this box is checked, then the selected SPD will not be modeled in the Surge analysis.

Device Type

Type of Surge Protection Device to be used.

Electrically Actuated Anticipation Valve Input Data

  • Inflow Resistance - This specifies the amount of resistance to flow into the system (pipe).

  • Outflow Resistance - This specifies the amount of resistance to flow out of the system (pipe).

  • High Pressure Pilot Pressure - Pressure setting for High Pressure Pilot.

  • External Pressure - This field is the external pressure next to the pipe. A value of 0 means exiting to the atmosphere.

  • Solenoid Opening Time  - Time for Surge Anticipation Valve to go from closed to fully open during down surge.

  • Solenoid Fully Open Time - Time for Surge Anticipation Valve to stay in fully open mode during down surge.

  • Solenoid Closing Time - Time for Surge Anticipation Valve to go from fully open to closed during down surge.

  • Sensing Junction ID - This is the location of the node where the sensor is installed. If left blank, the junction with Surge Anticipation Valve is the sensing junction.

  • Solenoid Initial Delay Time - Time for Surge Anticipation Valve to activate.

  • High Pressure Pilot Valve Opening Time - Time for Low Pressure Pilot open Surge Anticipation Valve from closed to fully open.

  • High Pressure Pilot Valve Closing Time - Time for High Pressure Pilot open Surge Anticipation Valve from fully open to closed.

  • Valve Type - This specifies the valve type of Surge Anticipation Valve.

Purge - Use the Purge button to remove existing Data.

Create/Update - Enter new or changed data and exit the dialog box.

Cancel - Cancels any new or changed data and closes the dialog box.