Which two valves are installed at each AFFF mixing station?

Which two valves are installed at each AFFF mixing station?

• A. SOPV and Powertrol Valve
• B. Check Valve and Gate Valve
• C. Ball Valve and Butterfly Valve
• D. SOPV and Check Valve

Answer: (A)

At each AFFF mixing station you’ll find a SOPV and a Powertrol valve. The SOPV provides automatic, fast-acting isolation of the foam concentrate line, enabling safe start/stop and interlock with the control system. The Powertrol valve is a pressure-regulating control valve in the mixing loop, ensuring stable pressure and proper foam concentrate proportioning as supply conditions change. This combination gives reliable, safe operation: one valve handles rapid on/off control, the other maintains consistent mixing. Other valve pairs don’t deliver both automatic control and pressure regulation, which is why they’re not the standard setup.

At each AFFF mixing station you’ll find a SOPV and a Powertrol valve. The SOPV provides automatic, fast-acting isolation of the foam concentrate line, enabling safe start/stop and interlock with the control system. The Powertrol valve is a pressure-regulating control valve in the mixing loop, ensuring stable pressure and proper foam concentrate proportioning as supply conditions change. This combination gives reliable, safe operation: one valve handles rapid on/off control, the other maintains consistent mixing. Other valve pairs don’t deliver both automatic control and pressure regulation, which is why they’re not the standard setup.