Quimica

Workshop Manual
3153

893585/05

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3153

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3153

CONTENTS
Safety precautions ________________ 4

Data plate interpretation ____________ 6

Technical data ____________________ 8

Tools __________________________ 9

Service and Inspection ____________ 11

Electrical connections ______________ 13

Sensor connections ______________ 18

Design of the pump________________ 20

Dismantling _____________________ 22

Assembly _______________________ 37

Impeller trimming, NT-version ______ 57

Exploded views __________________ 62

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3153

SAFETY
SAFETY PRECAUTIONS

In order to minimize the risk of
accidents in connection with
service work, the following rules
should be followed:

– Before starting work on the
pump, make sure that the pumpis isolated from the power
supply and cannot be
energized.
– Bear in mind the risk of accidents. Make sure
that the machine or parts of the machine
cannot roll or fall over and injure people or
damage property.
– Make sure that the lifting equipment can
handle the weight you want to lift and that it is
in good condition.
– Make continuously sure that, in the course of
the work, the pumpand / or pump
components stand steadily and cannot fall
down and cause damage.
– Don't work under suspended load.
– Carry out the work on a sturdy workbench.
– Bear in mind the danger of electrical
accidents.
– Bear in mind health hazards. Observe strict
cleanliness. When carrying out repair work
take care to avoid injury by cutting or
pinching.
– Make sure you have a first-aid box nearat
hand.
– Check that tools and other equipment are in
good condition.

Follow all other health and safety regulations, local
codes and ordinances.

General rules
Wash the outside of the pump thoroughly.
Before assembly:
- Clean all parts thoroughly, particularly O-ring
grooves.
- Always change all O-rings, gaskets, washers and
seals.
- Lubricate all springs, screws and O-ringswith
grease.

ITT Flygt disclaims all responsibility for work
done by untrained, unauthorized personnel.

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3153

NOTES FOR EX-PRODUCTS

— Only Ex-approved pumps may be
used in an explosive or flammable
environment.

— Do not open the pump when an explosive gas atmosphere may be
present.

— Before starting work on the pump,
make sure that the pump and the
control panel areisolated from the
power supply and can not be energized. This applies to the control
circuit as well.

— All mechanical work on the explosion-proof motor section must be
performed by personnel authorized
by ITT Flygt.

— Electrical connection on the explosion-proof motor must be made by
authorized personnel.

— Thermal contacts must be connected
to protection circuit intended for thatpurpose according to the approval of
the product.

— The pump may be used only in accordance with the approved motor
data stated on the data plates.

— Intrinsically safe circuits are normally required (Ex i) for the automatic level control system by level
regulator if mounted in zone 0.

— This equipment must be installed
in conformity to prescriptions in
international or national rules (IEC/EN 60079-14 ).

— The maintenance operation must
be made in conformity to the
international or national standards ( IEC/EN 60079-17).

— The yield stress of fastener elements in the product must be in
conformity with the value specified in the table for “Material of
fastener” on the approval drawing or the parts specified in the
part list for the product.

— According to the ATEXdirective
the Ex-pump must never run dry
or snore. Permitted minimum
water level, see dimensional
drawing for the pump.

— The user must know about the
risks due to the electric current
and the chemical and physical
characteristics of the gas and/or
vapours present in hazardous
areas.

— ITT Flygt disclaims all responsibility for work done by untrained,
unauthorized personnel....