BEDU S Series Operating And Maintenance Manual Download Page 6

Page: 6 / 40

1.4

NAME, TYPE

The standard pump construction is made of AISI 316L stainless steel with graphite supports
and mechanical seal in ceramic/graphite/viton. The complete series includes several models
which vary in size, materials and mechanical seals. Furthermore, the Manufacturer can also
provide models with preheating chambers, double mechanical seals, magnetic drive, sani-
tary fittings, etc. The pump identification is obtained by an alphanumeric code, an example
of which is shown below:

- 0NAX010/D0HF0C0: N type pump, A class, construction in AISI 316L stainless steel, rat-

ed flow 10 l/min. at 1500 rpm (cubic capacity 7.8 cm3/revolution), gears in AISI 316L,
graphite bushes, dual mechanical seal, equipped with preheating chamber.

1.5

NOISE EMISSIONS

Reference standard: CEN/TC 197/SC3 N 21 E -fig.8- ISO 3744 on 6 positions

Measured values:

1 -

Equivalent weighted continuous acoustic pressure level

Leq = 75 dB(A);

2 -

Maximum weighted instantaneous acoustic pressure

C (peak level) Lpc < 78 dB(C).

Test conditions: When measuring noise, the pumped liquid (ref. to a liquid with 1 cP vis-

cosity) must be introduced into the testing system at a speed of less than 0.8 m/s into
pipes. It must however reach laminar flow regime (thus the speed must be related to the
viscosity) and the conditions outlined in this manual must be respected.

1.6

APPLICATION FIELDS AND LIMITS. ALLOWED AND NOT ALLOWED
USES

Each machine shall  be  used  according  to  the  type  of  application, operating  conditions  and
liquid characteristics  provided  in  contract  specifications.  Each  variation  which  alters  the  in-
tended use of the pump is forbidden and the User is fully responsible for it (e.g. the use of a
liquid which is corrosive to pump materials rather than the recommended fluid, etc.). For var-
iations in use within the application limits (e.g. fluid viscosity variations) it is advised to con-
tact the Manufacturer in advance.

Max. working pressure, for pumps in standard execution, is 15 bar.

In any case, the use of “KK” or alike plastic gears to allow the pump to operate also
with poorly lubricating fluids, requires greater attention to avoid excessive or unex-
pected pressure loads.

It is absolutely forbidden to use the machine in hazardous environments (explosive
atmosphere, etc…), the use of hazardous substances (e.g. fluids with dangerous gas-
es), in critical conditions (e.g. abnormal temperatures, etc…), which are not supplied
with the pump.

For pumps and pump units intended to be used in potentially explosive environ-
ments, please read

carefully “Additional instructions for the operation and manage-

ment of pumps and pump units intended to be used in potentially explosive atmos-
pheres (Directive 94/9/EC)”. In case of slipping of the magnetic coupling, the surface
temperature can rise up to 350°C in few seconds; therefore the temperature close to
the coupling must be continuously checked.

Bedu Pompen B.V

. declines every responsibility for the consequences arising from an im-

proper use of the machine which does not comply with what prescribed in this manual or
specifically requested when ordering.

www.bedu.nl