16
ELRO
®
Pumps for hazardous materials GUP 3-1,5 and GP 20/10Ex
3.0 Notes on operation
3.1
Points to be observed before use
The pump must only be used by
professionals and in compliance with the
safety regulations (see chapter 2).
1. Before start-up make sure that the
pump is in perfect condition.
The pump must only be operated
in upright position with suction and
pressure ports pointing up.
2. The pump is delivered ready for
operation. In order to avoid friction heat
and to save the pumping hose the pump
is filled with 1 litre of silicone oil.
3. Check the pump arrangement to ensure
that suction lift and discharge head are
not exceeded.
3.1.1 Pump suction line
1. If the fluid to be pumped contains solid
particles with a size of more than 8 mm,
a filter, e.g. flat suction box, suction
strainer should be used. This filter must
be permanently monitored and cleaned.
3.2
Installation and connection
The pump unit must be placed on a level
base of sufficient load bearing capacity for
the weight of the pump.
Since the pump is a positive displacement
pump it must be assured that no shut-off
elements are installed in the pressure side.
Pump for hazardous materials GUP 3-1,5
acc. to DIN 14427
The pump is fitted with Camlock quick
couplings DN 50 (male part) for the
connection of hoses.
The matching couplings on
suction side
consist of:
Camlock coupling DIN 2828, DN 50
(female part)
Elbow, 90° pressure gauge,
DN 50 for chemical applications
screw fitting, DIN 11851, DN 50
(female part)
Blanking plug DIN 11851, DN 50
with chain
on
pressure side
of:
Camlock coupling DIN 2828, DN 50
(female part)
T-union with two times DN 50
Male part and two blanking caps
with chain DIN 11851
All connecting fittings are made of material
V4A (1.4571). The pump for hazardous
materials GP 20/10 Ex can alternatively be
equipped with Storz couplings C or tank
truck couplings. ELRO pumps for hazardous
materials GUP 3-1,5 and GP 20/10 Ex are
provided with motor protection switch, Off-
switch and two-stage On-switch (stage I and
stage II).
