What are the two types of SOPVs?

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Study for the DC 311 Aqueous Film Forming Foam (AFFF) Transfer Station Operator Exam. Improve your knowledge with flashcards and multiple choice questions. Understand the concepts with hints and explanations. Prepare thoroughly for your certification!

Multiple Choice

What are the two types of SOPVs?

Explanation:
The thing being tested is how the foam system isolates flows. In SOPV setups for AFFF transfer, there are two levels of shut-off valves designed for different isolation needs: the Master valve and the Group valves. The Master valve serves as the main shut-off that can completely isolate the entire foam system. The Group valves are placed at sections or banks within the system and can shut off foam flow to just a portion of the network without affecting the rest. This split—system-wide control versus sectional control—lets you perform maintenance or tests on one area while keeping the others running, and it supports a safer, more flexible shutdown and restart process.

The thing being tested is how the foam system isolates flows. In SOPV setups for AFFF transfer, there are two levels of shut-off valves designed for different isolation needs: the Master valve and the Group valves. The Master valve serves as the main shut-off that can completely isolate the entire foam system. The Group valves are placed at sections or banks within the system and can shut off foam flow to just a portion of the network without affecting the rest. This split—system-wide control versus sectional control—lets you perform maintenance or tests on one area while keeping the others running, and it supports a safer, more flexible shutdown and restart process.

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