Valve Sizing: Flow Calculations
For CV calculation use this basic liquid flow formula.
CV = Flow Coefficient, QL = Flow (GPM), SG = Specific Gravity, ∆P=Pressure Drop (PSIA)
Specific Gravity for Common Fluids (SG)
Water: 1.000
LN2: 0.808
LH2: 0.071
LHe: 0.125
LAr: 0.400
LO2: 1.140
Flow Coefficient Table for Standard Cryogenic Valves
Find the flow coefficient for Cyocomp standard valves by size and body style for your convenience when designing your cryogenic system.
C2000 Series & C3000 Series Cryogenic Valves CV
1/2″ Valve Size
Globe Body: 2.6 CV
Right Angle Body: 5.7 CV
Y-Pattern Body: 5.6 CV
See all C2000 1/2″ cryogenic valves
See all C3000 1/2″ liquid helium valves
1″ Valve Size
Globe Body: 16.3 CV
Right Angle Body: 28.6 CV
Y-Pattern Body: 25 CV
See all C2000 1″ cryogenic valves
See all C3000 1″ liquid helium valves
C2000 Series Cryogenic Valves CV
1-1/2″ Valve Size
Globe Body: 31 CV
Right Angle Body: 37 CV
Y-Pattern Body: 42 CV
See all C2000 1-1/2″ cryogenic valves
2″ Valve Size
Globe Body: 42.3 CV
Right Angle Body: 54 CV
Y-Pattern Body: 59.4 CV
See all C2000 2″ cryogenic valves
C5000 Series Cryogenic Valves CV
1/2″ Valve Size
Globe Body: 1.1 CV
Right Angle Body: 2.3 CV
Y-Pattern Body: consult factory
Joe is a product manager for Cryofab. After studying sales and marketing at Providence College, Joe joined Cryofab in 2021 to assist in managing the Cryocomp product line. With a focus on valves and evacuation components, Joe is happy to be a resource for any cryogenic related questions or inquiries.