ITT Engineered Valves 903, Инструкция по установке, эксплуатации и обслуживанию

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Select the proper o-ring for the valve size.
Valve size, inches (DN) O-ring 3
0.50 (15) #118
0.75 (20) #119
1.00 (25) #121
1.25 (32) #122
1.50 (40) #122
2.00 (50) #122
2.50 (65) #128
3.00 (80) #128
4.00 (100) #130
6.7 Replace the o-rings
18 Handwheel Operated Valves (903, 913, 963) Installation, Operation, and Maintenance Manual