English (GB)
5
1.5 Dosing chemicals
1.6 Diaphragm breakage
If the diaphragm leaks or is broken, dosing liquid
escapes from the drain opening (fig. 41, pos. 11) on
the dosing head. Observe section
To avoid any danger resulting from diaphragm
breakage, observe the following:
•
Perform regular maintenance. See section
.
•
Never operate the pump with blocked or soiled
drain opening.
– If the drain opening is blocked or soiled,
proceed as described in section
7.6.1 Dismantling in case of diaphragm
breakage
.
•
Never attach a hose to the drain opening. If a
hose is attached to the drain opening, it is
impossible to recognise escaping dosing liquid.
•
Take suitable precautions to prevent harm to
health and damage to property from escaping
dosing liquid.
•
Never operate the pump with damaged or loose
dosing head screws.
Warning
Before switching the supply voltage
back on, the dosing lines must be
connected in such a way that any
chemicals in the dosing head cannot
spray out and put people at risk.
The dosing medium is pressurised and
can be harmful to health and the
environment.
Warning
When working with chemicals, the
accident prevention regulations
applicable at the installation site
should be applied (e.g. wearing
protective clothing).
Observe the chemical manufacturer's
safety data sheets and safety
instructions when handling chemicals!
Caution
A deaeration hose, which is routed into
a container, e.g. a drip tray, must be
connected to the deaeration valve.
Caution
The dosing medium must be in liquid
aggregate state!
Observe the freezing and boiling points
of the dosing medium!
Caution
The resistance of the parts that come
into contact with the dosing medium,
such as the dosing head, valve ball,
gaskets and lines, depends on the
medium, media temperature and
operating pressure.
Ensure that parts in contact with the
dosing media are resistant to the
dosing medium under operating
conditions, see data booklet!
Should you have any questions
regarding the material resistance and
suitability of the pump for specific
dosing media, please contact
Grundfos.
Warning
Danger of explosion, if dosing liquid
has entered the pump housing!
Operation with damaged diaphragm
can lead to dosing liquid entering the
pump housing.
In case of diaphragm breakage,
immediately separate the pump from
the power supply!
Make sure the pump cannot be put
back into operation by accident!
Dismantle the dosing head without
connecting the pump to the power
supply and make sure no dosing liquid
has entered the pump housing.
Proceed as described in section
7.6.1 Dismantling in case of diaphragm
breakage.
