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PRV Sizing Calculator app for iPhone and iPad


4.4 ( 4704 ratings )
Productivity Education
Developer: Tim de Jong
0.99 USD
Current version: 1.0.1, last update: 4 years ago
First release : 15 Nov 2018
App size: 15.21 Mb

PRV Sizing Calculator uses the equations described in API 510, and allows the user to size a pressure relief valve intended for gas/vapour, steam or liquid duty.

The calculator offers the user the choice of two unit sets; SI (kg/hr, kPa(a/g), degrees Kelvin) and USC (lb/hr, psi(a/g), degrees Rankine (note the user will need to convert from degrees Centigrade (C + 273.15 = K) and Fahrenheit (F + 460.0 = R) respectively).

Note on the vapour and steam calculation sheets that only the mass relief rate can be input, or calculated); the volumetric flow rate cannot be used as a parameter. This has been done deliberately to minimise user error.

When the calculator is configured to run in Calculate Area mode, the API relief valve size will be displayed; this will be a letter designation from D to T.