Agilent Technologies IDP 10, Инструкция по эксплуатации

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19
IDP-10 Dry Scroll Vacuum Pump
DRAF
T 1/13/17
Mechanical Connections
Isolation Valve
The IDP-10 has an optional integral automatic isolation
valve. If the IDP-10 is equipped with this valve, an inter-
nal timer opens the valve 30 seconds after the pump is
switched ON. If power is lost or the pump is switched
OFF, the isolation valve will immediately close.
Pump Inlet
Use NW25, or larger, clean vacuum hardware with as
short a length as practical between the pump and vacuum
chamber.
Insert a bellows between the pump and vacuum chamber
to provide both vibration isolation and strain relief.
Pump Exhaust
A female 1/4" National Pipe Thread exhaust fitting is
located radially near the front of the pump. Additionally,
an NW16 male adapter with 1/4" National Pipe Thread is
provided. To avoid overheating the pump, do not restrict
the exhaust flow with long lengths of small diameter tub-
ing. Use as short as practical lengths of NW16, or larger,
diameter hardware.
Gas Ballast
When pumping gas loads containing water vapor or con-
densible gases, use the gas ballast. To activate gas ballast
(may be removed using a 9/16 nut driver), remove the
solid 1/4 NPT plug from either port 1 or port 2, and install
the sintered filter plug provided with the pump (see
Figure 6 on page 15).
Figure 8 Gas Ballast
Figure 8 shows the Gas Ballast plug assembly in both
ports 1 and 2.
Gas ballast port 1 is used for moderate water vapor loads,
such as intermittently pumping out a volume exposed to
normal ambient humidity. Gas ballast port 2 is used for
high water vapor loads, such as repetitively pumping out
a volume exposed to excessive ambient humidity, or pro-
cess gas loads with a high water vapor content. With both
gas ballast 1 and gas ballast 2 in use, up to 120 g/hr water
vapor can be handled. If both gas ballast 1 and gas ballast
2 are open (plugs removed, allowing for air flow), the sin-
tered filter plug should be installed in the gas ballast 2
location instead of the gas ballast 1 location.
For applications where ingress of air is undesirable, dry
nitrogen at a flow rate of approximately 5 l/min can be
provided to the gas ballast inlet by making a 1/4 NPT
connection to the port. If either gas ballast is to be used
for only short intervals, the removable insert may be
taken out of the gas ballast without removing the entire
plug. By removing this insert (may be removed using a
1/8" hex wrench), the gas ballast allows for air flow
through the brass orifice. There is no need to remove the
brass orifice (see Figure 8).
CAUTION
If hazardous materials are pumped, do
not use gas ballast.
CAUTION
Pumping high water vapor loads can
cause a temporary increase in ultimate
pressure, due to adsorption and absorp-
tion of water vapor by the internal sur-
faces of the pump. Pumping water
vapor loads in excess of the water vapor
handling capability of the gas ballast
can cause reduced time between tip
seal replacements.