15
APV_UF3 ATEX_UK-0_122018.indd
UK
Relief Valve
DELTA UF3-ATEX
Instruction Manual UK-0
APV
11. Maintenance
Additionally required maintenance for applications in ATEX
environment
Valve maintenance
for spring-bearing
components
Note
Functional test,
visual inspection of actuator
stroke and
control of abnormal running
noise of the spring
1 x per year
Change interval
(spring cylinder and seat lift
actuator)
In case of damage,
incomplete actuator movement,
considerable running noise of
spring as well as
after 250,000 cycles* as
preventive measure, however,
after 10 years at the latest.
*complies with about 8 years in 1-shift-operation and 10-15 cycles per hour.