You should perform inspection, testing, and maintenance on a regular basis. The precise length of time depends on the service conditions, valve condition, and level of performance desired.
We recommend an initial inspection interval of no longer than 12 months.
For valves equipped with a lift lever, we recommend a monthly “try lever test” to ensure the disc is free. The valve should be subjected to at least 75% of set pressure and allowed to snap shut for best leak-tight performance. Use appropriate personal protection equipment (hearing, eye, and temperature protection) as steam and/or high temperature high pressure media may be discharged from the outlet and other openings in the valve such as vent and drain holes. A “try lever test” for high temperature hot water boilers can be performed only when water temperature is below 200°F.