High vacuum pumps, exhausters and blowers operating manual
15
4.9 - CONNECTION
DANGER
Pump connections should be performed by skilled and trained personnel only.
4.9.1 - INTAKE AND OUTLET CONNECTIONS
All the pump’s openings are protected in order to prevent extraneous parts entering it. Only remove these protections
positioned on the intake and outlet points shortly before connecting to the user system. Using thick steel hoses
reduces the noise. Clean the hoses thoroughly especially remove welding fluxes to prevent foreign bodies from
reaching the pump and damaging it.
The connection to the user system (intake and outlet) should be carried out using strain neutralizers to prevent
tensions and/or deformations on the flanges. The couplings and piping should have a diameter equal or greater than
that of the pump intake/outlet opening..
WARNING
Thoroughly clean the intake and delivery flanges checking the status of the seal surfaces and make sure
that the couplings, piping or flanges connected to the pump intake/outlet are firmly tightened and that there
are no leaks.
The weight of pipes or any expansions must not burden the pump connections. We recommend you to carry out the
final connection to the pump using flexible pipes or fittings, thus avoiding rigid connections that can induce tensions
and cause harmful vibrations. It is important to tighten all pipes and couplings. Extreme long piping or one with a
diameter that is too small and with tight, regular curves reduces the pump’s performance.
Employing the machine as a blower, the use of thick-walled steel pipes has a lowering noise effect. Clean accurately the
pipes, removing, in particular, welding debris particles in order to avoid that foreign objects get inside the compressor and
damage it. Avoid narrowing the pipes and creating short radius curves. The weight of the pipes must not rest on the
compressor but must be supported separately.
An expansion joint, on the pressure side, eliminates pressure on the machine caused by thermal elongation of the pipes.
We recommend the fitting of accessories described in chapter 5
‘ACCESSORIES’.
WARNING
Little amounts of fluid are enough (coming from the container or the piping) to produce blows on the rotors
inside the pump chamber. The blows can deform the rotors and cause the pump to seize. Possibly take
suitable protective measures on the piping of the intake line (e.g. separator, T- fittings, etc..).
WARNING
Make sure that vibrations or loads are not transmitted on the pump’s attachments.
WARNING
Use an intake filter, especially if the pump works with unclean air flows.
4.9.2 - ELECTRIC CONNECTION
WARNING
Check that voltage and frequency correspond to values shown on the motor plate.
The connection cable must be in line with the power absorbed by the motor pump (the pump’s absorption levels
are shown on the electric motor plate) bearing in mind the environmental operating conditions. Use the cable clamp
openings to pass the power cables inside the terminal board.
DANGER
Always earth the pump. Always connect the earth cable to the relative clamp before connecting to the
mains supply and check the dispersion capacity.