4.3.2 Mechanical fixing
WARNING: PUMP SEIZURE
Risk of injury and damage to equipment. Do not operate the pump until it is correctly
installed. If the pump seizes, the stored energy of the rotor can cause fast movement
of the pump, which can cause damage and injury to people.
WARNING: INLET SCREEN
Risk of injury. The inlet screen is a coarse filter for debris. Do not use the inlet screen
as a finger guard.
WARNING: EJECTED PARTS FROM PUMP
Risk of injury and damage to equipment. Position the system view
‑
ports and
vulnerable components away from the pump inlet. Failure to do so can cause damage
from the ejected parts if the pump rotor fails.
Obey one of the methods that follows to install the pumps:
▪
Install the pump through its inlet flange to a rigid, firmly fixed vacuum system.
Refer to
Inlet connection and orientation on page 35
▪
If installation of the pump is not possible because of the nature of the vacuum
system, install the base of the pump at a firm support. Refer to
for instructions on base mounting the pump.
4.3.3 Inlet connection and orientation
The pump can be installed at the vacuum system through the inlet flange. You can
mount the pump in vertical and upright through to horizontal (± 2°). If the pump is
mounted horizontally and used with a rotary vane backing pump, the backing port must
point vertically down (± 20°) to decrease the risk of contamination from the backing
pump oil.
Make sure that the pump inlet and the components installed to the pump inlet are clean
and dust
‑
free. Failure to do so can increase the pump
‑
down time.
The inlet connections for the pump are ISO flanges:
▪
Use the manufacturer's combination inlet screen and trapped O
‑
ring supplied with
the pump. Use a quantity of 8 M8 bolts to ISO898-1 strength class 12.9 (each
torqued to 20 Nm) to connect the inlet flange of the pump to the vacuum system.
Tighten all inlet flange bolts again when the system is under vacuum. Make sure that
torques or other forces are not transmitted to the pump from the vacuum system or the
related pipelines.
4.3.4 Base mounting
The base of the pump can be installed on a rigid support using the tapped fixing holes.
Refer to
Figure: nEXT200200 dimensions (mm) on page 21
for the installation hole
details.
Page 35
B85200880_D - Installation
Содержание nEXT200200
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Страница 77: ...6 8 Bakeout nEXT200200 split flow pumps are not applicable for bakeout Page 73 B85200880_D Operation...
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