30
4.5 System piping
The diameters of the system piping must be chosen in order to obtain an average gas speed from 15 a 30
m/s and must never be smaller than the diameters of the blower openings, if
the diameters are different, use a taper connector.
The system piping should be properly aligned and supported to prevent stress
on the blower openings
Connect the cooling ports to atmosphere by means of silenced pipings.
Warning:protect consistently the cooling port from the risk of
cutting and trapping.
Provide flexible joints and support the pipes near the nozzles.
Isolate the pipes to avoid heating the environment as well as a precaution to
accidental contact
The pipes must be thoroughly cleaned before connection, in case of vacuum operation install a dirt filter for
the first 100 working hours and provide a vacuometer to check the dirt filter.
The gaskets must not interfere with the gas system.
Warning : Remove the protective covers from the blower openings just before connection.
Warning: The surface of the delivery pipes can exceed 70 °C.
The recommended accessories are the following
4.5.1 Vacuum operation
This is the standard operation of the blower, the relief valve RVV is optional because the blower can operate
with suction nozzle closed
Pos. Description
SA
Inlet silencer
SM
Discharge silencer
SJ
Injection silencer
RVV Relief valve
WR
Check valve
4.5.2 Pressure operation
In this case insert a check valve WRi in the injection pipe in order to prevent the back flow of outlet gas.
The operation in this condition must respect the performance limits of the corresponding blower RBS (see the
S12--- manual)
Pos.
Description
F
Filter
WR
Check valve
RVP
Relief valve
SPF
Inlet silencer
SM
Discharge silencer
SJ
Injection silencer
WRJ
Injection check valve
4.5.3 Pressure / Vacuum operation
With this kind of blower is not possible the Pressure / Vacuum operation
WR
SA
SM
RVV
SJ
SJ
RVP
SM
SA
F
WR
WRJ
www.fraserwoods.ca
