Hello,
We have issue with plugging vacuum pump cooling area, after the stoppage of pump in main central cooling system, once in app. 3 months.
Inlet cooling water temperature in vacuum pump(VP) is 12 deg C. Inlet water pressure is app. 6 bars. Outlet water temperature is 70 deg C. Work temperature of vacuum pump is app. 70 deg C.
Inlet water filter is 80 microns. Cooling water hardness is higher µS compered to requirements, actually I do not know exact value.
The issue is plugging of cooling area in VP, but only when the main central cooling system pump stops.
After the restart, cooling area plugs and VP overheats, then VP is turned off. Then we have to open VP cooling area to clean of the particles coming from the main system and maybe because of scaling coming from hardness of cooling water because higher output temperature of water of 70 deg C.
Most probably there are two effects, fine particles coming from the iron tubes from main system and particles coming from the highter water hardnes on higher outlet temperature of water of 70 deg C.
Also to mention that in the VP is installed reducer tube with small orifice of app. 2 mm to restrict flow to 4 lit per minutes, because if the vacuum pump is not at the work temperature (around 70 deg C) it can not reach process vacuum.
We have idea to implement two separate water loops, outer - existing one and second new additional internal with new Temperature cooling unit with water of less hardness of app. 50 µS.
Is there maybe any better and more simple solution?
Thank you.
BR
Orion
We have issue with plugging vacuum pump cooling area, after the stoppage of pump in main central cooling system, once in app. 3 months.
Inlet cooling water temperature in vacuum pump(VP) is 12 deg C. Inlet water pressure is app. 6 bars. Outlet water temperature is 70 deg C. Work temperature of vacuum pump is app. 70 deg C.
Inlet water filter is 80 microns. Cooling water hardness is higher µS compered to requirements, actually I do not know exact value.
The issue is plugging of cooling area in VP, but only when the main central cooling system pump stops.
After the restart, cooling area plugs and VP overheats, then VP is turned off. Then we have to open VP cooling area to clean of the particles coming from the main system and maybe because of scaling coming from hardness of cooling water because higher output temperature of water of 70 deg C.
Most probably there are two effects, fine particles coming from the iron tubes from main system and particles coming from the highter water hardnes on higher outlet temperature of water of 70 deg C.
Also to mention that in the VP is installed reducer tube with small orifice of app. 2 mm to restrict flow to 4 lit per minutes, because if the vacuum pump is not at the work temperature (around 70 deg C) it can not reach process vacuum.
We have idea to implement two separate water loops, outer - existing one and second new additional internal with new Temperature cooling unit with water of less hardness of app. 50 µS.
Is there maybe any better and more simple solution?
Thank you.
BR
Orion
