Which valve types share the same tolerable leak rate of 80 drops in 1 minute?

Which valve types share the same tolerable leak rate of 80 drops in 1 minute?

• A. Oil valves
• B. Ball valves
• C. Both oil valves and ball valves
• D. F/O manifold valve

Answer: (C)

Valve leak-rate tolerances are set by the design family because different valve types seal differently under test conditions. An 80 drops-per-minute limit is a threshold used for certain valve types whose seating and packing can meet that level of leakage without compromising operation. Oil valves and ball valves share this same tolerance because their sealing surfaces and packing configurations produce comparable leakage performance, so both are allowed up to 80 drops per minute. The F/O manifold valve is not in the same family, so its acceptable leak rate is different, which is why it doesn't share the same 80 drops-per-minute limit.

Valve leak-rate tolerances are set by the design family because different valve types seal differently under test conditions. An 80 drops-per-minute limit is a threshold used for certain valve types whose seating and packing can meet that level of leakage without compromising operation. Oil valves and ball valves share this same tolerance because their sealing surfaces and packing configurations produce comparable leakage performance, so both are allowed up to 80 drops per minute. The F/O manifold valve is not in the same family, so its acceptable leak rate is different, which is why it doesn't share the same 80 drops-per-minute limit.