Pilot Operated Safety Valves in Liquid Systems
The minimum discharge area of a pilot operated relief safety valve in a liquid system can be calculated as
A = q SG1/2 / (36.81 Kvisc dp1/2) (1)
where
A = discharge area (Square Inches)
q = relieving capacity (Gallons per Minute)
SG = Specific Gravity of the fluid
Kvisc = correction factor due to velocity - 1.0 for most water systems
dp = differential pressure - set pressure (psig) + over pressure (psig) - back pressure (psig)
Related Topics
• Design of Control and Safety Valves
Sizing and dimensions of control valves & equipment in steam and condensate systems.
• Pressure Ratings of Pipes and Fittings
Pressure ratings of pipes and tubes and their fittings - carbon steel , stainless steel, plastic, copper and more.
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