14
APV_UF3 ATEX_UK-0_122018.indd
UK
Relief Valve
DELTA UF3-ATEX
Instruction Manual UK-0
APV
11. Maintenance
The maintenance intervals depend on the corresponding
application and are to be determined by the operator himself
carrying out temporary checks.
The valve must not be cleaned with products containing abrasive
or polishing material. Especially the valve shaft must not, under
any circumstances, be cleaned with such agents. Damage of the
valve shaft can lead to leakages.
Before start of maintenance and assembly the operator must make
sure that an explosive atmohsphere does not exist (detection/
measurement of potential concentration of hazardous substances).
Alternatively, use spark-resistant tools!
Exchange of seals is done according to Service Instructions.
Customer stock keeping of spare seals is recommended.
For valve service actions we supply complete seal kits
including seal grease (see spare parts lists).
Attention!
Use food-grade grease and special greases being
suited for the respective seal material, only!
Recommendation:
APV assembly grease for EPDM, FPM, HNBR and NBR
(0,75 kg/tin
- ref.-No. 000 70-01-019/93; H147382)
(60 g/tube
- ref.-No. 000 70-01-018/93; H147381)
or
APV assembly grease for VMQ (Silicone)
(0,6 kg/tin
- ref.-No. 000 70-01-017/93; H147380)
(60 g/tube
- ref.-No. 000 70-01-016/93; H147379)
!
Do not use grease containing mineral oil for EPDM seals.
!
Do not use Silicone-based grease for VMQ seals.
Less suited grease types can influence function and service life.