AUMA Electric multi-turn actuators SA 07.1 - 48.1_SAR 07.1 - 30.1 NORM - Manual (Page 24)

17. Enclosure protection IP 68 (option)
Definition According to EN 60 259, the conditions for meeting the requirements of enclosure
protection IP 68 are to be agreed between manufacturer and user.
AUMA actuators and controls in enclosure protection IP 68 meet the following
requirements according to AUMA:
.
Duration of submersion in water max. 72 hours
.
Head of water max. 6 m
.
Up to 10 operations during submersion
.
Modulating duty is not possible during submersion
Enclosure protection IP 68 refers to the interior of the actuators (motor, gearing,
switch compartment, control, and terminal compartment).
For multi-turn actuators, the following has to be observed:
When using output drive types A and AF (stem nut), it cannot be prevented that
water enters the hollow shaft along the valve stem during submersion. This leads
to corrosion. The water also enters the thrust bearings of output drive type A,
causing corrosion and damage of the bearings. The output drive types A and AF
should therefore not be used.
Inspection AUMA actuators and controls in enclosure protection IP 68 undergo a routine
testing for tightness in the factory.
Cable glands
.
For the entries of the motor and control cables appropriate, cable glands in
enclosure protection IP 68 must be used. The size of the cable glands must be
suitable for the outside diameter of the cables, refer to recommendations of the
cable gland manufacturers.
.
As standard, actuators and controls are delivered without cable glands. For
delivery, the threads are sealed with plugs in the factory. .
When ordered, cable glands can also be supplied by AUMA at an additional
charge. For this, it is necessary to state the outside diameter of the cables. .
The cable glands must be sealed against the housing at the thread with an
O-ring. .
It is recommended to additionally apply a liquid sealing material
(Loctite or similar).
Commissioning When commissioning, the following should be observed:
.
Sealing faces of housing and covers must be clean
.
O-rings of the covers must not be damaged
.
A thin film of non-acidic grease should be applied to sealing faces
.
Covers should be tightened evenly and firmly
After submersion
.
Check actuator.
.
In case of ingress of water, dry actuator correctly and check for proper function.
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Multi-turn actuators SA 07.1 – SA 48.1 / SAR 07.1 – SAR 30.1
AUMA NORM
Operation instructions