New York Low Pressure Boiler COF Practice

What component should not be adjusted on the safety valve during testing?

1. Pressure relief setting

2. Compression screw

3. Spring tension

4. Gauge display

The correct answer is: Compression screw

The compression screw on a safety valve is not meant to be adjusted during testing because it has a specific role in maintaining the integrity and safety of the valve's operation. The compression screw is designed to set the factory-calibrated pressure at which the valve is supposed to open and relieve pressure. Adjusting this screw can lead to a change in the pressure relief setting, making the safety valve potentially unsafe or ineffective. The pressure relief setting is essential as it is predetermined based on the operating requirements and safety margins dictated by regulatory standards. Alterations to this setting during testing could result in unsafe conditions if the valve does not open at the correct pressure. Similarly, spring tension is inherently associated with the function of the safety valve and is usually set during manufacturing to match specific pressure requirements. Any adjustments made could compromise the safety and reliability of the valve, leading to potentially dangerous situations. The gauge display reflects pressure readings and does not require adjustment during safety valve testing. It should accurately indicate the pressure present in the system to ensure that the safety valve operates properly. In summary, the compression screw should remain untouched during testing to ensure that the safety valve operates within its designated pressure parameters, maintaining safety and compliance with established guidelines.