The new Pressure Relief Device is used to model fully open pressure relief valves or safety relief valves in both liquid and gas applications in PIPE-FLO Advantage and Professional 17.
Pressure Relief DeviceDesign Data for a
- Name (required): unique identifier, default set by Auto-Naming
- Design Status: non editable. Will change from Undesigned to Sizing to Designed when the sufficient operational and design data is entered, respectively.Elevation (required): this controls where the fan is in relation to the reference zero elevation datum of the system.
- Set Pressure (required): Pressure at which the Relief Valve is set to open
- Discharge Coefficient (required): Certified discharge coefficient from the manufacturer based on the actual discharge area.
- Discharge Area (required): Actual Discharge Area at the throat of the Relief Valve obtained from manufacturer data.
- Back Pressure Correction Factor (required): Back Pressure Correction Factor used to account for subcritical flow in gas applications per the ISO 4126 standard
Calculated Results for a Pressure Relief Device
- Flow Rate
- Total Pressure Drop
- Static Pressure Drop
- Head Loss
- Inlet Total Pressure
- Inlet Static Pressure
- Outlet Total Pressure
- Outlet Static Pressure
- Reynolds Number (liquid applications only)
- Viscosity Correction Factor (liquid applications only)
- Throat Static Pressure (gas applications only)
- Throat Isentropic Pressure Ratio (gas applications only)
- Critical Flow Rate (gas applications only)
- Critical Static Pressure (gas applications only)
- Subcritical Flow Coefficient (gas applications only)
- Isentropic Coefficient (gas applications only)
- % Deviation
Pressure Relief Device Calculations
The calculations used for the Pressure Relief Device are in accordance with the ISO 4126-1 standard "Safety devices for protection against excessive pressure - Part 1 Safety Valves".