What is the minimum pressure setting for the pressure relief valve in relation to operating pressure?

The minimum pressure setting for the pressure relief valve is critical for ensuring the safe operation of air compressors. The correct answer indicates that the pressure relief valve should be set to either no less than 15 psi or at 10% above the operating pressure. This dual criterion serves an important safety function.

Setting the relief valve to no less than 15 psi ensures that there is a baseline safety measure in place. If the operating pressure of the compressor is low, the 15 psi minimum would provide a safeguard against potential overpressure situations.

Additionally, the option of 10% above the operating pressure considers varying operating conditions and allows for a buffer to accommodate fluctuations in system demand or compressor performance. This approach minimizes the risk of damage to the compressor or connected equipment by preventing excessive pressure from building up within the system.

In summary, this combination of setting the relief valve at a minimum of 15 psi or 10% over the operating pressure ensures that the compressor operates safely under various conditions, protecting both the equipment and personnel.