The valves completed 15,000 full cycles each day. The valves that showed no leakage after life testing were further tested to determine their close-off capabilities. No leakage was observed on any valve before 300,000 cycles, which is approximately a 30-year life. After 300,000 cycles three of the valves showed some leakage at the stem and were removed from the test. The other 13 valves were further tested to determine their close-off pressure capability.
Similar tests are on-going.
There have been no CCVs returned for quality issues. We attribute this high quality level to the rigorous tests to which these assemblies have been subjected. If you do not see the product you need in our range, please let us know. Belimo is uniquely qualified to provide a solution for any HVAC control valve or damper actuator application. To increase the lifespan of the LM Series actuators, in some cases shortened by over-active control loops or the manufacturing tolerances of the internal DC motor, Belimo has designed a special circuit to protect the actuator against these conditions.