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The super fluid helium system consists of a heat exchanger module, three vacuum pumping systems and all interconnecting stainless steel piping, flanged bellows and valves.
The three vacuum pumping systems are used to attain a vacuum of 12 torr above a reservoir of liquid helium in the heat exchanger module. The helium gas is discharged from the vacuum pump manifold back into the compressor suction. To prevent blending of oils, both the vacuum pumping systems and helium compressor contain the same type of oil.
The vacuum pumping systems are Beach - Russ Model Number 5524-750 which consists of a Beach - Russ Model 750 mechanical pump with a 900 CFM pumping capacity and M-D Model 5524 - 90L2 mechanical booster with a 2,700 CFM capacity. Each pumping system contains an inlet and outlet bellows and isolation valves. The inlet valve is controlled remotely by a Raymond Control System Actuator Model 4060-DA with pneumatic positioner. Total operating time for the pumping systems ranges from 1712.5 to 2107.3 hours.
The vacuum pumps and heat exchanger are connected by a 10 inch schedule 10 stainless steel piping. The exhaust heater connecting the system to the compressor suction is 6 inch stainless steel pipe.
Additional information can be found by contacting:
Ms. Ivy K. Guice
John Colvin
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| Page Updated/Reviewed: 09/27/2006 8:59 AM |
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