J SERIES M ICROV A CJ SERIES M ICROV A C VA CUUM PUM P V A CUUM PUM P
PAGE 2 -4
2.52.5 CoolingCooling
2.5.1 The Stokes M icrovac pump is water cooled and must be connected to a
w ater supply.
2.5.2 The 1/2" w ater inlet connection is located in the pump housing on the drive side
near the bottom. See Figure 7.
2.5.3 Insert a valve in the w ater inlet line and regulate the w ater flow so that the
temperature of the oil in the reservoir is betw een 140 Deg. and 160 Deg. F. (60 - 71
Deg. C) Oil temperature kits are available that automatically control the water flow
to maintain the proper oil temperature (Contact Stokes Vacuum for specifications).
If pump is outside and subjected to freezing temperatures, the water tank and
circulating pump should be installed w ith anti-freeze in the w ater.
CAU TION:CAU TION: DO NOT START THE PUM P WHEN ODO NOT START THE PUM P WHEN OIL TEM PERATURE IS BELOW 55IL TEMPERATURE IS BELOW 55
oo
F. (13 F. (13
oo
C) C)
2.5.4 The 1/2" w ater outlet is located in the pump housing on the opposite side of the
w ater inlet. See Figure 7.
2.5.5 The w ater outlet SHOULDSHOULD be connected to an open drain to permit the operator to
check the flow and temperature of the outlet w ater periodically. There SHOULD SHOULD
NOTNOT be a valve or back pressure in the drain line. In some cases, cooling water
must be discharged to a pressure drain. In such cases, discharge pressure must
not exceed 35 P.S.I.G. and no block valve should be placed in discharge line unless
a 35 lb. relief valve is provided to protect pump from high inlet pressure.
NOTE:NOTE: If condensables are present in gas being pumped and gas ballast is used, throttleIf condensables are present in gas being pumped and gas ballast is used, throttle the the
cooling w ater to raise operating temperature to the level for gas ballast (See Sect. 3)cooling water to raise operating temperature to the level for gas ballast (See Sect. 3)
2.62.6 Lubrication of Pum pLubrication of Pump
The successful operation of this pump depends largely on the type of oil used. An initial charge of oil is included
w ith each pump. This standard oil is Stokes V-Lube (Label F) w hich is recommended for general operating
conditions in a relatively clean environment. The oil is a multigrade petroleum oil, fortified for oxidation
FIGURE 5 A WIRING DIAGRAMFIGURE 5 A WIRING DIAGRAM
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