4.3.4g
4.3.4f
4.3.4c
4.3.4e 4.3.4d
of
INDUSTRIAL PUMPS
www.debem.com
rev
CAUTION: risk of breakage and/or yielding of the threads.
Do not use threadlockers and/or Teon paste and conical threads. Excess PTFE tape and/or excessive
clamping pressure can cause cracks on the manifolds and/or yielding of the threads.
In the event of a vertical product delivery higher than 5 meters, it is necessary to install a check valve on the system
piping, to prevent the uid from burdening inside the pump.
Install the sleeves to secure the exible hoses on both valves.
CAUTION: do not attach the pump DIRECTLY with rigid pipe.
For negative installations and/or uids with high viscosity, use hoses with an OVERSIZE DIAMETER,
especially on the intake side. The lters or other equipment installed at the intake side must be suitably
dimensioned in order to avoid pressure drops.
Connect the exible hose with a metal core on the relative product suction and delivery connections, respecting
the arrows on the pump casing, which must always face upwards.
CAUTION
Check that the connection piping to the pump are is clean inside and do not contain solid or processing
residues.
Connect the exible hoses to the rigids ducts (suction and delivery) of the system.
CAUTION: danger of stress corrosion cracking.
Check that the system ducts are xed and self-supporting and that they do not burden on the pump.
Pay particular attention to stress corrosion cracking phenomena. The pump material may deteriorate due
to the combined action of corrosion and application of a load, which may cause parts subjected to stress
to break suddenly and unexpectedly, especially at low temperatures.
The pipes must be strong enough so as not to deform under suction and must never burden on
the pump and vice versa.
Fix exible hoses on the pump and on the system with appropriate hose clamps.
CAUTION: risk of premature wear and/or diaphragm breakage.
Apart from the on-off valve, do not install any other components on the pump suction (couplings, elbows,
valves, lters, coiled exible hoses, etc. - see diagram on page 34) which could compromise the pump
suction performance and cause the premature breakage of the diaphragms. The product on-off valves
must always be fully open during operation (never choked).
With high negative heads and/or high viscosity (if necessary), the pump must be pneumatically fed grad-
ually using a “soft start” valve.
Delivery
< 5 m
Check
valve
2.5 m
OK
OK
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