System Components
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9.1.3 The Blower
The blower circulates the gas in the Glovebox through the column for purification. It is mounted
inside an enclosure that is attached to the floor of the purifier module. The blower enclosure is
connected through two pipes using two KF-40 connections.
9.1.3.1 Variable Speed
The variable speed blower is fully variable from off through full speed. There is one electrical
connection containing five wires. Two of the wires are for 115 VAC input power and the other
two are for a 0 to 10 VDC reference voltage that controls the blower's speed. This reference
voltage is provided by the PLC controller.
9.1.4 Vacuum Pump
The vacuum pump provides the means to reduce overall pressure levels in the main box and the
Antechamber(s). It is electrically turned on via a Press button on the main control screen. In
response to this user action, the PLC controller turns on a solid state relay. The relay supplies
line voltage to turn on the pump. In response to a requirement to lower the box pressure, or
pump down an Antechamber, the PLC will open valve, “VA”, or “AE”, respectively. The pump
will turn on automatically if it is needed by the system.
9.1.5 Chambers
There are many different types of Antechambers available from
MRC
, Inc. However, the
standard chamber is a 15" I.D. by 24" long cylinder mounted on the left or right side of the
.box. In addition to this, a 6" x 15" mini Antechamber is also available on either side
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