4.3.4g
4.3.4f
4.3.4c
4.3.4e 4.3.4d
Page 33
of
68
INDUSTRIAL PUMPS
www
.debem.com
Chapter 4 - Transport and Positioning
Translation of original instructions -
S
CUBIC- S
BOXER
rev
. 2021
Check
valve
Delivery
< 5 m
OK
OK
2.5 m
MAX 5 m
CAUTION:
risk of breakage and/or yielding of the threads.
Do not use thread lockers and/or Teflon paste and conical threads. Excess PTFE tape and/or excessive
clamping pressure can cause cracks on the manifolds and/or yielding of the threads.
4.3.4c
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 fluid from burdening inside the pump.
4.3.4d
Install the sleeves to secure the flexible hoses on both valves.
CAUTION: do
not attach the pump DIRECTLY
with rigid pipe.
For negative installations and/or fluids with high viscosity, use hoses with an OVERSIZE DIAMETER,
especially on the intake side. The filters or other equipment installed at the intake side must be suitably
dimensioned in order to avoid pressure drops.
4.3.4e
Connect the flexible metal core hose to the suction and discharge connections, observing the arrows on
the pump body, which must point upwards.
CAUTION
Check that the pipes connecting to the pump are clean inside and do not contain any solid or processing
residues.
4.3.4f
Connect the hoses to the rigid pipes (suction and discharge) of the system.
CAUTION
: danger of stress corrosion cracking.
Ensure that the system piping is secured and self-supporting and that no loads are placed 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.
4.3.4g
Fix flexible hoses on the pump and on the system with appropriate hose clamps.
CAUTION
: risk of premature wear and/or diaphragm breakage.
Apart from the shut-off valve, do not install any other components on the pump suction (couplings, elbows,
valves, filters, coiled flexible 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.