Leak test of NA58 COMPASS polarized target safety valves using Alcatel leak 
detector. The valves were connected to the pumping port of the detector with 
vacuum on the high pressure side of the valve. Leaks through the valve and
from ambient air were checked by blowing helium gas on the valves. Detected
leak rate in units mbar l/s is given. The vacuum pressure was less than 
2 10^-3 mbar.


Safety valves for magnet

Valve 	no 	Pressure  Description		Leak rate[mbar l/s]
PSV25  	8844  	+1.5 bar  was LN2 cooling line	not tested
PSV23  	8845  	+1.5 bar  was LN2 cooling line 	not tested
PSV11046 11046  +1.75 bar LN2 cooling line	not tested
PSV11047 11047  +1.75 bar LN2 cooling line	not tested
PSV65  	8842  	+0.5 bar  Helium dewar  	not tested
PSV66  	8841  	+1.25 bar Helium dewar 		not tested


Safety valves for dilution cryostat

Valve  	no  	Pressure  Description 		Leak rate[mbar l/s]
VS54 	8136  	+0.5 bar  separator to air	<10^-8
VS61 	9648  	+0.2 bar  4He pumping line to	
			  air			<10^-8 
VS66 	2085  	+0.5 bar  cavity pumping line to 
			  air 			<10^-8
VS42 	9647  	+0.15 bar 3He pumping line to 
			  tanks 		<10^-8 
VS29 	2708  	+0.5 bar  3He condensation line 
			  to tanks		<10^-8 outside <10^-5 through
VS43 	9649  	+1.5 bar  control valve ref 
			  pressure  		<10^-7 
VS71  	9650  	+1.0 bar  3He service pump	 
			  exhaust 		<10^-6 
VS99  	9651  	+2.0 bar  LN2 inlet		not tested
PSV99  	8843  	+0.5 bar  LN2 dewar		not tested

Thu Mar 12 13:53:21 CET 2009
Jaakko Koivuniemi