ATEX HYDROKINETIC ROTATING CLEANING HEADS
SAFETY NOTE
SN01
Rev. 00
Date 22/04/2020
Pag. 7 of 10
3.5.2
SUITABLE & NON-SUITABLE USE
Overall utilization: The head can work solely by a continuous flow which fills constantly the body, minus impurities and
air bubbles. The rotation of the head forms a strong trigger source if this should occur with an empty head. However,
the head is operated solely by the water flow and the rotation starts only by a significant minimum pressure function.
If there is a lack of the water flow, the internal members stop. A 3 bar minimum pressure from the mains guarantees
constantly the filling of the head and therefore prevents eventual void rotations. Install a gauge to verify the mains
pressure.
The cleaning liquid should have an ignition temperature of minimum 50K over the maximum exterior temperature of
the appliance's surface where the cleaning liquid is utilized. (T=200 °C).
It is forbidden to make substantial modifications to the head (replacement of parts not recognized by P.A. S.p.A. or
assembly variations). In the other cases of ordinary & extraordinary maintenance and repairs, refer to the
maintenance manual.
In no case is it foreseeable to guarantee the protection from trigger sources for superior strains other than those
maximum permitted (PS – TS –velocity) considered in the planning stage, in view of the safety measures adopted.
The Company P.A. S.p.A. declines all responsibility for damage to persons, animals or things derived by an improper
use of the apparatus a/o the non observance of the dispositions contained in the present manual.
3.5.3
DANGEROUS AREAS
Particular attention has to be reserved to any area potentially explosive around the head and also from the inside. Do
not open the head in areas potentially explosive and during working. Before opening the head, disconnect it from the
machine and bring it to a safe area.
It is severely forbidden to operate on the tightening components and on the apparatus connections whilst running
and in any case each time it is predictable that the area may contain a potentially explosive ambient.
3.5.4
DANGER & POSSIBLE RISKS
Hot surfaces
The heads always present the danger of hot surfaces due to the maximum temperature of 90°C: always check that the
internal fluids and external areas cannot trigger off at such a temperature. The surface temperature must not be
higher than 80% of the minimum temperature ignition of the Gas measured in ° C.
Naked flames and hot gas
Naked flames and hot gas are forbidden around the head.
Mechanical sparks
Sparks have to be excluded during a normal function even if they can occur in case of foreseen and rare dysfunctions;
they can be caused by friction, knocks or abrasion, hammering.
Ultrasounds (acoustic danger)
Tank measurement is forbidden when the head is in function.
