8.
Enclosure protection IP 68-6
Definition
According to DIN EN 60529, the conditions for meeting the requirements of
enclosure protection IP 68 are to be agreed between manufacturer and
user.
AUMA gearboxes in enclosure protection IP 68-6 fulfil the following require-
ments in compliance with AUMA definitions:
.
Head of water max. 6 m
Inspection
AUMA gearboxes in enclosure protection IP 68-6 undergo a routine testing
for tightness in the factory.
After submersion
.
Check gearbox.
.
In case of ingress of water, dry gearbox correctly and check for proper
function.
Notes
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 to the bearings. The output
drive types A and AF should therefore not be used during submersion.
Use suitable sealing material between valve flange and gearbox.
12
Multi-turn gearbox GSTI 25.1 – GSTI 40.1 qualified for use in nuclear power plants
(Inside and Outside Containment)
Operation instructions
