Farris Engineering Valve Orifice Areas

2850 Series

Serial # Suffix  R4
Inlet Size
Vapor
Liquid
3/4"
0.164
0.098
1"
0.281
0.173
1 1/2"
0.657
0.390

Coeff of Discharge : Vap Kd = 0.953
Liq Kd = 0.64 (Use Non Code Liq Equation)

Certified for Air, Steam Service