APV API594, Installation And Operating Manual

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CHECK VALVES - SWING, TILTING DISC & PISTON - API594/API6D/BS1868/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual 17
A P P E N D I X A - C O N T.
TABLE E
Cv Value for API 6D Swing Check Valve
Size
Units
(gal/min)/(lbf/in
2
)
0.5
mm inch 150LB 300LB 600LB 900LB 1500LB 2500LB
50 2 124 124 124 124 124 101
80 3 282 282 282 282 282 200
100 4 523 523 523 523 523 398
150 6 1236 1236 1236 1236 1141 947
200 8 2283 2283 2283 2283 2085 1815
250 10 3574 3574 3574 3574 3217 2804
300 12 5347 5347 5347 5347 4801 4098
350 14 6528 6528 6528 6034 5813 4969
400 16 8609 8609 8609 8084 7533 6451
450 18 11478 11478 11478 10807 9960 8459
500 20 14307 14307 14307 13386 12441 10605
600 24 20898 20898 20898 19576 17968
TABLE F
Cracking Pressure for API 6D Swing Check Valve
Size
Units kPa
(Psi)
mm inch 150LB 300LB 600LB 900LB 1500LB 2500LB
50 2 2.55 (0.37) 2.55 (0.37) 2.55 (0.37) 2.27 (0.33) 3.79 (0.55) 4.82 (0.70)
80 3 1.72 (0.25) 1.72 (0.25) 2.69 (0.39) 2.00 (0.29) 2.82 (0.41) 5.37 (0.78)
100 4 1.72 (0.25) 1.72 (0.25) 1.45 (0.21) 2.55 (0.37) 2.82 (0.41) 3.58 (0.52)
150 6 0.96 (0.14) 0.96 (0.14) 1.58 (0.23) 2.89 (0.42) 2.82 (0.41) 4.82 (0.70)
200 8 1.31 (0.19) 1.31 (0.19) 1.86 (0.27) 3.24 (0.47) 3.86 (0.56)
250 10 1.10 (0.16) 1.10 (0.16) 1.65 0.24) 3.17 (0.46) 4.48 (0.65)
300 12 1.10 (0.16) 1.10 (0.16) 2.34 (0.34) 2.27 (0.33) 4.48 (0.65)
350 14 1.65 (0.24) 1.38 (0.20) 2.48 (0.36)
400 16 1.38 (0.20) 1.72 (0.25) 2.76 (0.40)
450 18 1.72 (0.25) 2.55 (0.37) 2.55 (0.37)
500 20 2.55 (0.37) 1.72 (0.25) 2.69 (0.39)
600 24 1.72 (0.25)