Belimo valve assemblies and valve actuators are recommended replacements for failed or damaged components to improve occupant safety, comfort, and productivity. A poorly functioning HVAC system can be transformed into a safer system while minimizing operation costs

†  Verify control valves operate correctly by checking the valve stokes and ensure the selected signal, whether on/off, floating, or modulating, is working accurately.

†  Verify the design flow requirement with a strap-on ultrasonic meter or with another measurement device.

†  Override the valve position with the DDC system and verify that the feedback is tracking the signal.

†  Change setpoint through the BMS or the thermostat to verify proper operation.

†  Inspect the valve stem for leakage.

†  Close the valve, and confirm no fluid is passing through the valve seat by using a measurement device.

†  Make sure the direction of the flow is correct and not reversed.

†  Ensure that you have enough pressure drop across the valve using differential pressure sensors or other measuring devices.

†  Verify water quality and remove any air bubbles from the installation.

If a replacement is needed, Belimo offers a full range of valve actuators,  valve assemblies, piping packages, and pipe sensors to meet your needs. If you need technical expertise, contact a Belimo Regional  Application Consultant.