VACUUBRAND PC 600 LAN NT - Manual (Page 55)

page 55 of 102
Notes on operating a VACUU•LAN ® Local Area Vacuum Network.
Assembling the components of a VACUU•LAN ® network:
A VACUU•LAN ® Local Area Vacuum Network consists of three main com-
ponents: vacuum pump or vacuum pumping unit, vacuum tubing and
ports.
The ports, i.e. the VACUU•LAN ® modules, are composed of three com-
ponents: a mounting base with connections for tubing, a module body,
and one or more functional elements They can be combined or adapted
in accordance to the requirements in the laboratory. A non-return valve is
integrated in each VACUU•LAN ® module.
p
Set 1
p
Set 2
p
Set 3
system pressure (pressure in vacuum tubing)
network pumping unit
Ports with non-
return valves
Manually controlled vacuum applications:
In general, avoid running parallel processes on the same VACUU•LAN ®
network which vary significantly in the required pumping speed and/or
required vacuum level. This is especially important if theses processes
will be operating simultaneously.
If several manually controlled ports are operated simultaneously, it is
recommended that a means of flow control be installed, such that the
required process pressures of the applications are just attained. Perma-
nent gas flow through VACUU•LAN ® ports has the same effect as a leak
and leads to reduced vacuum (i.e., higher pressure) to serve the vacuum
network. For example, if ports are permanently left in the open position
as part of filtration process, then this will increase the pressure level in
the vacuum network resulting in diminished capacity to support work at
other VACUU•LAN ® ports in the network.