6.3.1b
6.3.1a
6.3.1b
Page 47
of
68
INDUSTRIAL PUMPS
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Chapter 6 - ROUTINE MAINTENANCE
Translation of original instructions - S
CUBIC -
S
BOXER
rev
. 2021
6.3 TIGHTNESS CHECK
This operation is reserved for trained and qualified maintenance technicians, equipped with appropriate
Personal Protective Equipment (PPE)
(see Technical and Safety Data Sheets of the liquid treated)
.
6.3.1
TIGHTNESS CHECK
The tightness of the pump and product ducts must be checked after the first 2 hours
of operation and then
periodically every 500,000 cycles of operation.
CAUTION
: danger due to product spillage, danger due to contact with toxic or corrosive fluids
.
The tightness check ensures a correct seal of the product circuit; in the event of leaks or product leaks,
it is always necessary to carefully check that the pump and the internal sealing components are intact
before commissioning.
Safety requirements for the operation:
•
Pump stopped with air supply disconnected and interlocked and residual pressure discharged;
•
Closed suction and delivery valves;
•
Pump with the external parts cleaned/washed;
•
Suction and delivery pump and circuits at MAX ambient temperature 40°C.
Proceed as follows to check the tightness of the pump:
6.3.1a
Using a suitable torque spanner, check the tightening of the pump screws in accordance with the torques
indicated in the
TIGHTENING TABLE on page 48
.
CAUTION
:
risk of stress corrosion cracking phenomena and sudden breakages.
Excessive tightening (especially on plastic pumps), can cause dangerous tensions on some components
and sudden breakages that cannot be attributed to construction defects.
6.3.1b
Check the tightness of the connection fittings to the pump and the tightness of the hose clamps of the
product ducts.
6.3.1c
Remove the tools used from the pump.
The tightness check of the pump and product ducts is completed.