It is recommended that Busch R500 Series oil be used
to receive the best performance from your vacuum
equipment. R500 Series oil is a high quality vacuum oil
which will give longer running time between oil
changes, will provide better lubrication at high operating
temperatures, and will prolong the life of exhaust filter
elements. This oil can be obtained directly from Busch,
Inc. in Virginia Beach, Virginia.
The strict use of Busch oils and parts from the day of
purchase can extend the standard warranty to three
years. Contact Busch, Inc. in Virginia Beach, Virginia
for details. Refer to page 11 for the Limited Standard
Warranty.
For general applications, use R530 in most models cov-
ered by this manual. Use R590 or R570 in pumps that
are operated in high ambient temperatures (above
90°F) or when the oil can carbonize (turns black) before
the change interval. Contact the factory for recommen-
dations when using other oils.
The TECHNICAL DATA chart on page 13 gives the
approximate quantities of oil required for each pump.
The oil capacity chart should only be used as a guide,
since oil capacity may be slightly lower, depending on
whether the pump was filled previously, and whether all
components such as oil filter, oil lines, etc., were
allowed to completely drain. Use only the sight glass
reading for proper level.
Never overfill!
For ambient operating temperatures lower than 41°F,
use Busch R580 synthetic oil. If this does not help
(where the pump has difficulty starting due to high oil
viscosity) contact the factory in Virginia Beach, Virginia.
Replace the oil fill plug (Ref. 88) and pressure gauge
(Ref. 90), making sure that the gasket (Ref. 89) is in
place and properly seated and secured. Pumps are
equipped with an exhaust pressure gauge as an inte-
gral part of the oil fill plug. Switch the power back into
the "on" position.
2.0
OPERATION
2.1
Start-up
Check rotation of the motor as described in Section 1.3
- Power Requirements.
Fill the pump with oil as described in Section 1.5 - Oil
Filling.
Start the pump and immediately close the inlet. Run the
pump for a few minutes before checking the oil level
again. With the pump shut off, the oil level should be
visible in the oil sight glass (Ref. 83), between the "MIN"
and "MAX" mark.
Add oil, if necessary, but only add it when the pump has
been shut off and the circulating oil has had sufficient
time to return to the oil sump.
2.2
Gas Ballast
R 5 Series RA 0165 through 0305 D pumps are
equipped with an adjustable gas ballast valve (Ref.
474). The adjustable gas ballast valve should normally
be left open. Its primary function is to prevent water
vapor from condensing in the pump. Condensation
causes emulsification of the oil, loss of lubricity, and
possible rotor seizure.
Check the gas ballast filter periodically to ensure that air
is flowing through it properly.
2.3
Process Gas
The R 5 series pumps are designed to pump air and are
not intended for use when water vapor is being
pumped. In some applications, when the quantity of the
water vapor is moderate, R 5 pumps have been used
with good results. On these occasions, the pump is run
until it is up to operating temperature before it is allowed
to pump the process gas. The pump is also operated
for a period of time off process and on air (to clear it of
process gas) before it is shut down. This operating
technique prevents the vapor from condensing in the
pump. Before attempting to pump a gas laden with
water vapor, contact Busch Engineering for advice.
2.4
Stopping Pump
To stop the pump, turn off the power. The pump has a
built-in anti-suck-back valve (Ref. 251 thru 255) to pre-
vent the pump from rotating backwards when it is shut
off.
Install a manual or automatic valve or check valve in
each pipe leading to each pump when multiple pumps
are pumping on a common header.
All R 5 Series pumps are vented internally to atmos-
pheric pressure through venting holes which are next to
the exhaust valve assembly.
2.5
Water-Cooled Pumps (Optional)
Water-cooled pumps are cooled by circulating the oil
WARNING: Keep the oil fill plug tight as
pressure in the exhaust box could cause
bodily injury if the plug is blown out. Do not
fill/add the pump with oil through the
exhaust/inlet ports as there is danger of
breaking the vanes!
CAUTION: Do not use the anti-suck-back
valve as a check or shut-off valve for your
vacuum system.
4
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Страница 120: ...RA 0165 0205 0255 0 0305 D Ref BMC Dwg T111 911 728 D 15 Fig 5 Exploded View Drawing of Pump ...