ProMinent Sigma X Operating Instructions Manual page 28

Installation
Fig. 16: Moulded composite seals with
grooved insert
28
CAUTION!
Particles larger than 0.3 mm
The valves may no longer close properly with feed
chemicals with particles larger than 0.3 mm.
– Install an appropriate filter in the suction line.
CAUTION!
Warning of the pressure line rupturing
With a closed pressure line (e.g. by a clogged pressure
line or by a valve closing), the pressure that the metering
pump generates may reach several times more than the
permissible pressure of the system or the metering
pump. This could lead to lines rupturing resulting in dan‐
gerous consequences with aggressive or hazardous
feed chemicals.
– Install a relief valve that limits the pressure of the
pump to the maximum permissible operating pres‐
sure of the system.
CAUTION!
Uncontrolled flow of feed chemical
Feed chemical can press through the metering pump in
an uncontrolled manner in the event of excessive pri‐
ming pressure on the suction side of the metering pump.
– Do not exceed the maximum permissible priming
pressure of the metering pump or set up the installa‐
tion properly for this.
Hose lines with an insufficient pressure rating may rupture.
Only use hose lines with the required pressure rating.
n
Suction, pressure and relief lines installed incorrectly can come loose from
the pump connector.
Only use original hoses with the specified hose diameter and wall
n
thickness.
Only use clamp rings and hose sleeves that fit the respective hose
n
diameter.
Always connect the lines without mechanical tension.
n
Leaks can occur at the pump connector depending on the insert used.
The pump is supplied with PTFE moulded composite seals with a
n
flare, which are used for the pump connectors, and which seal the
connectors between grooved pump valves and ProMinent grooved
inserts, see Ä Further information on page 27 .
However, a new elastomer flat seal must be used in the event that a
n
smooth insert is used (e.g. third-party component), see
information on page 27 .
P_SI_0021
Ä Further