How should I install the Danfoss Differential Pressure Relief Controller AVPA? (Danfoss Pressure Relief Controller AVPA Instruction Manual)

Answer

manuals.plus

Jan 18, 2025 - 02:58 AM

To install the Danfoss Differential Pressure Relief Controller AVPA, please follow the instructions provided in the manual. Here is a step-by-step guide:

1. Prior to assembly and maintenance work, ensure that the system is depressurized, cooled down, emptied, and cleaned. Comply with the instructions of the system manufacturer or operator.

2. Clean the pipeline system before installation and consider installing a strainer in front of the controller for better performance.

3. Install pressure indicators in front of and behind the system part to be controlled.

4. Install the valve, ensuring that the flow direction indicated on the product label or on the valve is observed.

5. If the valve has mounted weld-on tailpieces, they should only be spot welded to the pipeline. The weld-on tailpieces should be welded without the valve and seals to avoid damaging the seals.

6. Ensure that the flanges in the pipeline are in a parallel position and that the sealing surfaces are clean and undamaged. Tighten the screws in the flanges crosswise in three steps up to the maximum torque (50 Nm).

7. Avoid mechanical loads on the valve body by the pipelines.

8. Insulate the pressure actuator if the medium temperatures are up to 100 °C.

9. During start-up, the valve is closed without pressure. It opens when the differential pressure rises above the adjusted set-point.

10. When filling the system for the first start-up, slowly open shut-off devices in the flow and return pipelines.

11. Perform leak and pressure tests according to the manufacturer's instructions to avoid damages to the actuator or the valve. The maximum test pressure is 1.5 times the PN (pressure nominal) indicated on the product label.

12. To put the system out of operation, slowly close shut-off devices in the flow and return pipelines.

Please note that these instructions are a summary. For more detailed information and specific guidelines, refer to the Danfoss Differential Pressure Relief Controller AVPA Instruction Manual.