Which component protects a pneumatic system from damage by limiting the maximum pressure in the lines?

Which component protects a pneumatic system from damage by limiting the maximum pressure in the lines?

• A. Lubricator
• B. Filter
• C. Regulator
• D. Pressure Relief Valve

Answer: (D)

The test is about safeguarding a pneumatic system from overpressure by releasing excess air when the line pressure gets too high. A pressure relief valve is designed to sense the system pressure and vent air when it reaches a preset limit, keeping the maximum pressure from exceeding safe levels and protecting components, hoses, and fittings from damage. While a regulator controls the intended downstream pressure, its job is to maintain a target pressure, not to act as a safety shutoff if something faults or surges. Lubricators and filters serve separate functions—adding lubrication or filtering contaminants—not limiting pressure. So the pressure relief valve is the component that best protects the system by limiting the maximum pressure.

The test is about safeguarding a pneumatic system from overpressure by releasing excess air when the line pressure gets too high. A pressure relief valve is designed to sense the system pressure and vent air when it reaches a preset limit, keeping the maximum pressure from exceeding safe levels and protecting components, hoses, and fittings from damage. While a regulator controls the intended downstream pressure, its job is to maintain a target pressure, not to act as a safety shutoff if something faults or surges. Lubricators and filters serve separate functions—adding lubrication or filtering contaminants—not limiting pressure. So the pressure relief valve is the component that best protects the system by limiting the maximum pressure.