Page 89 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition
P. 89
Fluid Flow 75
STOP-CHECK VALVES FOOT VALVES WITH STRAINER
(Globe and Angle Types)
I Poppet Disc Hinged Disc
Minimum pipe velocity Minimum pipe velocity
Minimum pipe: velocity Minimum pipe velocity (fps) for full disc lift (fps) for full disc lift
for full disc lift for full disc lift = I5 VT * 35
= 55 82 *7- -7582G
BALL VALVES
If: p- I,B=O ..........._.. l"3fT
elocity (fps) for full disc lift p < I and B 7 45O. . . . . . . .K2 = Formula 5
~
p < I and B > 45O 7 180". . .K2 =Formula 6
E BUTTERFLY VALVE
ll
Sizes z to 8'. .K 45fT
pipe
~
Min~~u~ velocity (fps) for full disc lift Sizes IO to 14'. . .K - jsj~
= 140 p2fi' Sizes 16 to 24'. . .K 3 ~5.f~
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