Dover ALMATEC Quattroflow QF5050 Series User Manual - Page 14

Browse online or download pdf User Manual for Water Pump Dover ALMATEC Quattroflow QF5050 Series. Dover ALMATEC Quattroflow QF5050 Series 16 pages. 4-piston diaphragm pump

Print Page
Dover ALMATEC Quattroflow QF5050 Series User Manual
Version of April 2012
5. Operating troubles, causes and remedial action
No.
Delivery
Pump
Pump
is not
does
does
obtained
not
not
or
start
prime
reduced
5.1 5.2
5.3
1
X
2
X
3
X
X
4
X
X
5
X
X
6
X
7
X
8
X
9
10
X
11
12
13
X
X
14
X
15
X
16
X
17
18
X
X
19
20
X
Operating troubles
Pressure
Irregular
Pump
head is
pump
operates
not
delivery
noisily
obtained
5.4
5.5
5.6
X
X
X
X
X
X
X
X
Motor
Pump
gets
is
too
leaky
warm
5.7
5.8
X
X
X
X
X
X
X
X
X
X
Causes and remedial
action
The 4-piston diaphragm pump
operates trouble-free at any time
provided they are applied according to
the operating conditions mentioned in
this manual.
If you have any questions, please
contact Quattroflow.
The screws of the pump-chamber
maybe not tightened enough. Fix it!
Check the direction of flow showed by
the arrow on the pump, in case of
wrong way, turn the pump head
Check suction pipeline and TC- seals
for tightness
Check suction head-increase suction
line cross section.
Check viscosity of liquid pumped.
Check pump speed. Control speed of
drive motor. Check voltage and
frequency
Avoid air inclusions in the liquid to be
pumped
Check pressure head-open valve in
discharge line completely, remove
obstruction in discharge line
Pressure line completely or partly
clogged Diaphragm maybe broken
Change diaphragm!
The diameter of the pipes in suction
or pressure line are to small
Check the coupling halves. They must
be fixed with at least 2-3mm space.
Check longitudinal play of coupling rod
pins. The spider might be worn.
Check whether foreign bodies in pump.
Disassemble pump, remove foreign
bodies, replace defective parts
Pump stopped by the Thermistor
switch. Please allow the motor to cool
down – please reduce the power
consumption.
Bearings are worn or defective.
Disassemble pump, replace the shaft –
bearing unit
The valves are dry (i.e. not in use for a
long time), deformed or worn. Change
valve or wet the pump.
The diaphragm is burst ( the discharge
pressure was too high) - replace it with
PSKITQ20k
O – rings between valve plate and
pump housing are defective - replace
it with PSKITQ4k
Align coupling accurately
The clamping ring screw got loose – fix
it! See 4.2 Mount the pump chamber
(picture 2 )
Page 14 of 16