Red Seal Instrumentation and Control Technician Practice Exam

What criteria are used to select a pressure relief valve?

1. Set pressure, type of media, size, and color

2. Set pressure, type of service, size, and material compatibility

3. Size, manufacturer, pressure rating, and service duration

4. Type of valve, service history, location, and installation complexity

The correct answer is: Set pressure, type of service, size, and material compatibility

The selection of a pressure relief valve is primarily based on critical criteria that ensure safety, regulatory compliance, and operational efficiency. For a pressure relief valve, determining the set pressure is essential, as it is the pressure at which the valve will open to relieve excess pressure. The type of service, whether it is a gas, liquid, or steam application, affects the valve’s design and material choice, ensuring it can handle the specific conditions of the medium. Size is significant for ensuring that the valve can handle the expected flow requirements without causing pressure buildup, while material compatibility is crucial to prevent corrosion or damage due to interaction with the media being processed. This combination of factors provides a comprehensive foundation to ensure that the relief valve functions effectively and safely within its designated application.