Spring Operated Safety Valves in Liquid Systems
The minimum discharge area of a spring operated relief safety valve in a liquid system can be calculated as
A = q SG1/2 / (28.14 Kbp Kvisc dp1/2) (1)
A = discharge area (Square Inches)
q = relieving capacity (Gallons per Minute)
SG = Specific Gravity of the fluid
Kbp = capacity correction for back pressure - 1.0 for atmospheric pressure systems
Kvisc = correction factor due to velocity - 1.0 for most water systems
dp = differential pressure - set pressure (psig) + over pressure (psig) - back pressure (psig)
• Pressure Ratings
Pressure ratings of pipes and tubes and their fittings - carbon steel , stainless steel, plastic, copper and more.
Heating Systems - Safety Valves Size vs. Boiler Power
Safety valves with boilers ranging 275 to 1500 kW.
Low Pressure Steam Safety Valves - Capacities
Sizing safety valves after boiler output power in low pressure systems (kW and Btu/hr).