PA S.p.A.
USER MANUAL FOR WATER-DRIVEN ATEX TANK
CLEANERS
INGLESE
PQ02-A13
Revisione: 09
Del: 01/09/2016
Codice: PQ02-A13
Pagina 7 di 8
2.4.1. Tools & Machinery
The safety of the system is also in function with control devices (conform with Directive
2014/34/EU
) which
must be absolutely independent from the head.
2.4.2. Load & Unload
Adequate means are foreseen for the draining and leakage in order to consent the cleaning operations,
inspection and maintenance in absolute safety conditions.
2.4.3. Start & Stop
In case of doubt and an irregular function, stop the productive process, do not make brief repairs and ask
qualified personnel.
2.5. Inspection, ordinary & extraordinary Maintenance, Service & Cleaning
2.5.1 Precautions
Before proceeding to the periodic procedures of inspection, maintenance, repairs & cleaning it is necessary
to discharge the internal pressure, through a duct converged in a safe area, to avoid damage to persons or
things and to verify the occurred discharge phase by means of control devices (gauges).
It is always necessary to verify the non-existence of potential explosive atmospheres and the impossibility to
trigger off.
The user must certify that the operator is opportunely instructed to carry out all the safety procedures &
hygiene in the work areas according to the protocol in order to avoid any eventual risks deriving from the
operations mentioned above.
2.5.2. Ordinary Maintenance and Cleaning
After a normal daily usage, wash the inside of the head with clean water without any additives. Carry out an
internal check after 100 hours and check the conditions of the internal parts (gears, bearings, dynamic
seals). The incorrect choice of the O-ring material (dynamic seals) can cause an irregular function and a
rapid deterioration of these parts. In presence of dimensional alterations (swelling) of the dynamic seals
(OR+PTFE), control the compatibility of the O-rings with the liquid used; If they result non-compatible,
contact our Technical office.
The cleaning stages are to be carried out regularly in view of the function and compulsory in the presence of
matter a/o explosive powders on the head and nozzles (independently from the settled thickness)
For internal and external cleaning, it is necessary to use non corrosive products or solutions, suitable to
remove the work residue, and that do not damage the O-ring surfaces and internal gears. For the cleaning
operations do not use aggressive chemical detergents a/o mechanical systems that can cut or deform the
head.
2.5.3. Extraordinary Maintenance and Repair
Please check the internal parts every 300 / 400 hours of work in order to verify any premature wear of the
parts. Replacement of the dynamic seals is recommended:
-
A42R-316
: pos. 23 and 32
-
A42R-316-
360°
: pos. 3 and 16
-
MI42-316
: pos. 21 and 36
-
A80RA
: pos. 5 and 19
-
MI63A
: pos. 3 and 23
Verify that the slide surfaces of the seals are in good conditions: replace the parts if worn out. Check also
bearings, bushings and gears: replace if damaged.
