4.3.4a
4.3.4b
of
INDUSTRIAL PUMPS
www.debem.com
rev
PRODUCT CIRCUIT CONNECTION
After positioning, it is possible to connect the pump to the product circuit as follows:
CAUTION: danger of chemical reactions to water
Before installing the pump for use with liquids that react with tap water, it is necessary to open the product
circuit and dry all internal surfaces.
Product system piping requirements
• The connection ttings must be made of the same material as the pump with cylindrical threads
(do not use tapered threads);
• Pump connection must include a piece of exible hose with a metal core
(do not attach the pump directly with rigid pipe);
• all exible hoses present must be reinforced with a metal core;
• Piping must be self-supported and must not burden on the pump;
• Correct sizing of the ducts (suction and delivery) for correct suction speed;
• Product on/off valves (suction and delivery, that do not cause pressure drops);
• With suspended particulate, install a correctly sized strainer on the suction
(surface 2.5 / 3 times the suction section of the pump with maximum allowed slot);
• With products that crystallise, provide a washing a circuit (with compatible products);
• Product ducts clean inside and without solid processing residues (shavings, particulates, etc.).
Diaphragm pumps with negative suction are affected by the following factors:
- Fluid viscosity - specic uid weight - diameter - length and/or bends on the suction.
Position the pump as close as possible to the point of collection (within 2.5 m) and in all cases, never
higher than 5 m vertically. The suction pipe diameter must never be smaller than that of the pump con-
nection; it must be suitable sized as the distance or viscosity of the uid increases.
CAUTION: risk of premature wear and/or diaphragm breakage.
The uid to be pumped with negative suction must never exceed a viscosity of 5,000 Cps at 20°C and a
specic weight of 1.4 Kg/l.
With higher viscosities,
physical factors intervene that require a correct evaluation, therefore,
it is
always necessary to contact the Manufacturer’s Technical Department in advance.
BOXER pumps are supplied with the product connection seats with Cylindrical gas threads. For connections to
the pump manifolds, only use ttings with cylindrical gas threads (non-tampered) of the same material
as the pump.
Example: (PP pump = PP ttings) or (INOX pump = INOX ttings).
On the delivery and discharge manifold install a manual valve of the same diameter as the pump inlet
(never smaller) or larger for negative suctions or for uids with high viscosity.
If necessary, load two turns of PTFE tape on the thread and tighten the valves onto the pump
manifolds (with moderate clamping pressure) until the seal is ensured.
Valve
PP
Pump
PP
OK
Valve
INOX
Pump
PP
MAX
2.5 m
MAX 5 m
Cylindrical gas
Conical gas
OK
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