Diaphragm Rupture Sensor - ProMinent Sigma X Operating Instructions Manual

Installation
Fig. 20: Permissible alignment of the relief
valve

7.1.2 Diaphragm rupture sensor

Diaphragm rupture sensor
30
CAUTION!
Danger of cracking
Cracks on the PVT liquid end can occur if a metal over‐
flow line is connected to the relief valve.
– Never connect a metal overflow line to the relief
valve.
CAUTION!
Danger of the integral relief valve failing
The integral relief valve no longer operates reliably with
feed chemicals that have a viscosity of greater than 200
mPa s.
– Only use the integral relief valve with feed chemicals
that have a viscosity of up to 200 mPa s.
CAUTION!
Warning of leaks
Feed chemical, which remains in the overflow line at the
relief valve or bleeder valve, can attack the valve or
cause it to leak.
– Route the overflow line with a continuous slope and
moreover with the hose sleeve pointed downwards,
see .
INFORMATION!: The bleed function is blocked if the overflow line is fed
into the suction line. Therefore lead the overflow line back into the supply
tank.
Minimal overflow into the overflow line can occur when operating the inte‐
P_SI_0023
gral relief valve close to the opening pressure.
CAUTION!
Danger resulting from unnoticed diaphragm rupture
If the pump has been ordered with an electric diaphragm
rupture sensor, it still has to be installed.
– Screw the enclosed diaphragm rupture sensor into
the liquid end.
CAUTION!
Warning of unnoticed diaphragm rupture
Only above approximately 2 bar system back pressure is
a signal generated in the event of the rupture of a dia‐
phragm.
– Only rely on the diaphragm rupture sensor with back
pressures of greater than 2 bar.
Or install a back pressure valve and set it to a min‐
imum of 2 bar – if the installation permits this.