The minimum discharge area of a relief safety valve in a steam system can be calculated as
A = m / (51.5 kd kbp P1/2) (1)
A = minimum discharge area (Square Inches)
m = relieving capacity (Lbs. per Hour)
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)
Sizing and dimensions of control valves & equipment in steam and condensate systems.
Factors of Safety - FOS - are important in engineering designs.
Safety valves with boilers ranging 275 to 1500 kW.
Sizing safety valves according boiler output power in high pressure systems (kW and Btu/hr)
Sizing safety valves after boiler output power in low pressure systems (kW and Btu/hr).
Calculate pilot operated relief valves in liquid systems.
American National Standards Institutes schedule for safety colors marking physical hazards.
Calculate spring operated relief valves in liquid systems.