After you’ve decided that on-line cleaning is the right solution to maintain efficiency and to extend bot service time between turnarounds and equipment lifespan, the following question presents itself: Which of the available condenser cleaning systems is the best for your project?
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In this article, we look at the different options available. Obviously, as a supplier of brush cleaning systems, we cannot be completely unbiased. However, we do our best to present the facts from a neutral standpoint.
The bottom or back side of the valve (the side that connects to heat exchanger/condenser) can be installed in the pipe work without extra precautions, while the top or front side of the valve (at the cover flange where actuator is to be installed) the piping MUST BE INSTALLED WITHOUT STRESS OR ANY FORCES ON THE VALVE BODY. We recommend rubber compensators in the piping of valve. The compensators supplied should be installed on the actuator (cooling tower) side of the valve
After actuator and position indicator are properly mounted and all wirings are connected according to the diagram, adjust position indicator which controls the initial alignment position of valve inlet/outlet holes and swing box hole of the valve.
PLC will automatically activate every 4 hours to complete a cleaning cycle. It is programmed to record the number of automatic cycles completed (downloadable to PC with specific software)
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To start up the water system follow the instructions from the chiller / heat exchanger. Make sure the valve and flange connections do not leak and that there are no air pockets in the pipe work. (Install deaeration valves where necessary).
Once the system pump(s) is running for a while, the first cleaning cycles can be activated manually. Monitor the valve behavior during operation and confirm that the swing box runs smoothly. If not, there may still be air pockets in the system. Let the pumps run for a while till all air pockets are filled.
The system is maintenance free and runs 1 to 2 years without any attention. Every 2 to 5 years the heat exchanger heads should be opened to check the condition of the pipes, brushes and baskets. Replace internal components if required.
The actual running time of the actuator is quite limited: +/‐ 2 minutes a day or +/‐12 hours per year. An oil replacement in the actuator is advised every 2 years depending on the ambient conditions of the valve/actuator set. Contact WATCO for more details.
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