- C -
The minimum discharge area of a relief safety valves in a gas or vapor system can alternatively be calculated with the equation
A = qs (SG T)1/2/ (1.175 C kd kbp P) (2)
A = minimum discharge area (Square Inches)
qs = relieving capacity (Standard cubic feet per minute)
SG = specific gravity of gas
T = absolute temperature (oR = oF + 460)
C = coefficient determined from ratio of specific heats - depends on the gas - see below
kd = discharge coefficient - 0.975
kbp = back pressure coefficient - 1.0 for atmospheric discharge systems
P = relieving pressure (psia) - set pressure (psig) + over pressure (psig) + atmospheric pressure (14.7 psia)
Air, LNG, LPG and other common gas properties, pipeline capacities, sizing of relief valves.
Factors of Safety - FOS - are important in engineering designs.
Safety valves with boilers ranging 275 to 1500 kW.
Calculate pilot operated relief valves in liquid systems.
Maximum safety valve free air relief capacity.
The most common used safety valve standards in Germany, UK, USA, France, Japan, Australia and Europe.
Calculate spring operated relief valves in liquid systems.
Categories of valves.
Types of valves and their typical operating sizes.
Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!
We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.
Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.