Cv Values
• Cv values provided for both airflow out of the tank (Venting Out) and for airflow into tank (Venting In) • V alues are valid for air at sub-critical flow velocities
Connection Size
Cv (Venting Out)
Cv (Venting In)
2.0" 3.0" 4.0"
53
60
102
223
188
212
Hygienic Spray Deflector Venting Out
Sub-Critical Flow when P 1 < 2 x P 2
(P 1 2 - P 2 2 ) (S.G. x T)
Q G =
962 x Cv
Hygienic Spray Deflector Venting In
Q G = Gas Flow in Standard Cubic Feet per Hour T = Absolute temperature in °R (°F + 460) P 1 = Upstream (Inlet) pressure in psia P 2 = Downstream (Outlet) pressure in psia psia = Absolute pressure. This is psig (gauge pressure) plus 14.7 (atmospheric pressure) S.G. = Specific Gravity of medium where air at 70 °F and 14.7 psia = 1.0
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Sani-Matic, Inc.
(p (p) 800-356-3300
(f)
TD-0005.1
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