[Dsg-hallb_magnets] Solenoid MPS water flow operations

[Pablo Campero]

Dear Dr. Rossi, 

With regards to the safety operation concerns/questions with the Solenoid MPS, after investigations I can mention the following: 

1. Recommended water supply flows and ΔP by Danfysik are: 
1.1. Flow has to be < 180 [l/min] At ΔP (Sup-Ret) = 6 [Bar]. 
1.2. Flow has to be < 115 [l/min] at ΔP (Sup-Ret) = 3 [Bar]. 

2. Danfysik performed a pressure test for the Solenoid MPS water cooling system at 31 [Bar] for 1 [min], during factory acceptance test protocol on 14/04/2015. 

3. The max absolute pressure rated by Danfysik = 12 [Bar]. 

4. The table below shows a summary of the values for MPS internal flows recommended and the actual flows as of now: 


Flow Switch 

	Flow Transmitter Dynamic Range [l/min] 	Recommended Flows by Danfysik [l/min] 	Measured Flows [l/min] 
FSW1 	1-80 	50 	67 
FSW2 	1-15 	8.22 	8.5 
FSW3 	1-80 	50 	71.87 
FSW4 	1-15 	1.45 	1.65 
FSW5 	1-15 	1.45 	1.55 
Total Flow 	-- 	111.12 	150.57 

Since actual measured supply flow is 150.57 [l/min] at ΔP (Sup-Ret) = 5.17 [Bar] within the recommended operational values, we can say that the MPS water cooling pressure and flow are safe. 
The MPS will not be damaged. 



Best Regards, 
Pablo 

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