Edwards nEXT 55, Instruction Manual

Page: 42 / 116

If the inlet screen is not in an installed position, the tangs must be snapped into the
locating groove in the inlet flange using an applicable tool to press them into position.
For ISO flanged pumps, we supply a combination inlet screen / trapped O-ring.
4.2.2 Mount the pump
The pump can be base or flange mounted using only the specified fixings. The NW40
inlet variant cannot be flange mounted.
WARNING: PUMP INSTALLATION
Risk of injury and damage to equipment. Make sure that the pump is installed at the
vacuum system through its inlet flange or base. Use all available mounting points. If
the pump fails, the stored energy of the rotor can cause fast movement of the pump.
This will cause damage and injury to personnel.
WARNING: PUMP FAILURE
Risk of injury and damage to equipment. If a pump fails it is likely to eject parts into
the vacuum system onto which it is mounted. The customer must make sure that a
hazard is not created if this happens. We accept no responsibility for injury or
damage to persons, equipment or property as a result of a failed pump ejecting parts
into a customer’s system.
▪ To mount the pump (base mount), use 4 x M5 bolts (Class 12.9) with 8 mm thread
engagement.
▪ To mount the pump (flange mount), use 4 x Edwards Hooded Claw Clamps
(C10007090) and tightened to 10 Nm.
Base mounting
The base of the pump can be fixed to a firm support using the tapped fixing holes.
Note:
Remove the four rubber feet from the four tapped fixing holes before you base mount
the pump.
Obey the requirements that follow to make sure that the pump stays secured if the
pump seizes:
Installation screws: 4 quantity of M5 to ISO898-1 strength class 12.9 (nominal
tensile strength 1200 MPa)
PCD (Pitch Circle Diame-
ter):
79 mm spaced equally. Refer to Figure: Typical base view .
Screw engagement length: 8 mm
Fastening torque:
6 Nm (0.612 kgfm)
Inlet connection and pump orientation
The pump can be installed at the vacuum system through the inlet flange. Do not
operate the pump in an orientation that is greater than horizontal.
07/2021 - ©Edwards Limited Page 42 B8G000880_E
B8G000880_E - Installation