Identify the device defined as a safety valve designed for quick shutoff.

• A. Gate Valve
• B. Maxon Valve
• C. Check Valve
• D. Relief Valve

Answer: (B)

In instrumentation, when you need a valve that can isolate a line quickly for safety, the key is a fast-closing, purpose-built shutoff device. The Maxon valve fits this role because it is designed specifically as a rapid-isolation safety valve used in instrument gas lines and similar systems. It closes quickly on demand to stop flow and protect equipment or personnel, which is what a safety valve focused on rapid shutoff is all about.

Relief valves are for venting excess pressure and don’t isolate the line. Gate valves are general shutoffs but aren’t built for rapid, automatic safety shutoff. Check valves prevent backflow but don’t provide a means to shut off flow when needed. So the device described is the Maxon valve.