BOC Edwards 412-J - Gas Ballast System; Lubricant Recommendations

J SERIES M ICROV A CJ SERIES M ICROV A C VA CUUM PUM P V A CUUM PUM P
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1.21.2 Gas BallastGas Ballast
WA RNIN G:WA RNIN G: NEVER USE GAS BALLASNEVER USE GAS BALLAST WHEN PUMPING GASEST WHEN PUM PING GASES OR GAS MIXTURES OR GAS M IXTURES THAT THAT
ARE EXPLOSIVE OR FARE EXPLOSIVE OR FLAM M ABLE.LAM M ABLE.
The pump is provided w ith a manually operated gas ballast valve to overcome the adverse affect on vacuum
resulting from oil contamination. Contamination occurs when water vapor or other gaseous components enter
the pump and condense within the pump, mixing with the oil as emulsified droplets. The condensate will mix
w ith the oil and “ flash” into vapor again as the oil circulates into high vacuum in the pump cylinder limiting the
vacuum to the vapor pressure of the condensed w ater. Gas Ballast is a controlled bleed of inert gas or air from
the atmosphere into the compression chamber of the pump. The ballast gases prevent water vapor from
condensing and mixing w ith the oil during the compression cycle. Other contaminates are also removed by
ballasting except those that dissolve in the oil.
1.31.3 Water SystemWat er System
A supply of cooling water at 85
o
F. (30
o
C) and 1-1/2 G.P.M . (5.7 LPM) for the 212-J and 2 G.P.M . (7.6 LPM ) for
the 412-J maximum is needed at the w ater inlet for efficient performance. Water pressure should not exceed 35
PSIG in the pump. See Section 2.5 for additional information.
1.41.4 Electrical SystemElectrical System
The main power supply is 230/460V., 60 Cy., 3 Ph. and should be wired through a suitable fused motor starter.
Pow er for the oil solenoid is taken from any two of the motor leads. Check both motor and solenoid nameplates
to insure proper voltage.
1.51.5 LubricantsLubricants
Refer to Section 2 for recommended pumping fluids.
1.61.6 GuardsGuards
The standard pump has a totally enclosed belt guard and flyw heel guard to cover the motor pulley, pump pulley, belts and
flyw heel.
1.71.7 Vacuum Break and Gage PortsVacuum Break and Gage Port s
The pump is provided w ith a ½” FPT Vacuum Break and a ¼” FPT Gage Port, as shown in Figure 7.
IM PORTANT:IM PORTANT: When using Gage PortWhen using Gage Port, provide a 90, provide a 90°° elbow and at least 12” (305 mm) of vertical pipe to the gage elbow and at least 12” (305 mm) of vertical pipe to the gage
sensor to reduce the chance of contaminating the gage w ith pump lubricants.sensor to reduce the chance of contaminating the gage w ith pump lubricants.