-3-
２．Pump description
2.1 Performance details
Table 1 Pump performance
MODEL GHD-101A GHD-101B GHD-101C GHD-101D
Voltage V
100 115-120 200 220-240
Frequency Hz
50/60Hz
TYPE Gaede type，2-stage, direct-drive
Exhaust velocity
L/minute
100（50Hz）/120（60Hz）
G.V.
6.7×10
-1
Ultimate
pressure
G.V. open
6.7
Standard
R-2
Oil
Amount
mL
1000
Ambient temperature
range
7～40
Location of use
Indoors
Noise level dB(A)
70
Inlet KF-25 (NW-25)
Inlet/exhaust
port diameter
Exhaust Standard-type (G1-size screw exhaust can be attached)
Overall dimensions
mm
155(W) x 413.5(L) x 234.5(H)
Weight
kg
22
Leakage
Pa・m
3
/sec
1×10
-6
Note 1) G.V. stands for gas ballast valve.
Note 2) The “ultimate pressure” in the above table is that shown on a Pirani vacuum gauge.
Note 3) The vapor pressure, viscosity, and oiliness, etc. of the pump oil varies with the type,
and this may affect the pump performance. Please use the sealed rotary vacuum
pump oil specified by us.
Specified oil ：R-2
Note 4) It may be difficult to start the pump of the ambient temperature is below the
minimum value.
Note 5) The “noise level” in the above table is the maximum value (the value when a
standard exhaust port is attached to the pump exhaust and the pump is operated
under a high load). The noise level can be lowered by attaching an oil mist trap.
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