Levelling The Pump; Securing The Pump; Piping And Ventilation - Edwards EXS Series Instruction Manual

5.2.2 Levelling the pump

The dry pumping system must be located on a firm, non‐combustible, level surface,
capable of supporting the pump mass, to ensure that it works correctly and is not
damaged. The pump must be level to a maximum of 3 degrees in any direction,
measured at the pump inlet. It can be located directly on the floor or a frame. Guidance
for the access areas (general and service) is given in the installation drawings.
▪ Pumps are provided with four floor mounting holes at the bottom of the base
frame, refer to
supplied) to ensure that the dry pumping system is level.
▪ Pumps with castors can be levelled by adjusting screws the castor has, refer to
Rear view
position, adjust the levelling castors to make sure that the dry pumping system is
level and is not supported by the castors. Refer to the
page 29 for the suggested jacking height.

5.2.3 Securing the pump

To secure the pump in place to prevent inadvertent movement (for example, during an
earthquake), take note of the following:
▪ All dry pumping systems can be secured by fitting the bolts or studs (not supplied)
through the mounting holes in the base frame. Use M16 (5/8 inch) bolts with
shake-proof washers or other suitable anchor bolts of the same size.
▪ Ensure that the bolt size and spacing is adequate for the loads anticipated and the
strength of the floor or frame.
▪ To locate the pump directly on the floor, use a concrete foundation with a mass of
at least 1.5 times the mass of the pump. Ensure that the length and width of the
foundation extend at least 100 mm (4 inches) beyond the dimensions of the pump.
▪ If vibration transmission is a concern, vibration isolators (not supplied) should be
fitted between the base frame and floor mounting bolt or stud.

5.2.4 Piping and ventilation

Piping connections
The vacuum distribution and piping system, including the vacuum pump and all related
components must be designed in accordance with generally accepted engineering
practices. Improperly designed distribution systems can cause damage to the vacuum
pump. For example, the process inlet pipe must slope away from the vacuum pump.
Process outlet piping, also called exhaust piping, must slope away from the vacuum
pump and must be installed such that it does not create additional back pressure on the
vacuum pump.
It is very important to use adequate pipe diameter for the vacuum network. The
combination of restrictive pipe diameter and long pipe runs can create a significant
pressure drop. A rule of thumb on single pump installations: maintain the diameter of
the pump inlet as far into the process as possible.
Do not install the vacuum pump such that it will cause strain on the inlet or outlet
flanges or any connecting pipework.
Refer to
A41870880_A
A41870880_A - Installation
Front view
on page 12. Once the dry pumping system has been pushed into the
Installation drawings on page 29.
on page 10. If necessary, fit shims (which must be
Page 32
Installation drawings on
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