OPERATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK DOUBLE ECCENTRIC BUTTERFLY VALVES
SERIES 756
OPERATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK DOUBLE ECCENTRIC BUTTERFLY VALVES
SERIES 756
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MI Butterfly756 rev. AC 2018
• Remove the axial bearing by loosening the 2 bolts with an allen key. This is only required up to and including DN 700.
From DN 800 and up it is not needed to remove the axial bearing.
• Assemble the locking device end plate to the non-drive shaft side ensuring that the disc is not in closed position.
• The gearbox can now be removed from the drive-shaft side.
Statutory and local provisions as well as the safety and accident prevention regulations must be observed and complied
with at all times.
Service, maintenance and inspection work as well as replacement of spare parts must be carried out by qualified
personnel only. The plant operator is responsible for selecting qualified personnel to carry out any of this work.
If the plant operator does not have personnel with the qualifications required, a training course must be initiated. Upon
request, such training course can be held by AVK service employees. The plant operator must ensure that all employees
concerned fully understand the operation and maintenance instructions as well as all further instructions referred to
here.
Protective equipment such as safety boots, safety helmets, goggles, protective gloves etc. must be worn during any
kind of work that prescribes such protective equipment. Incorrect use of the valve must be avoided.
7.2 INSPECTION AND OPERATION INTERVALS
At least once a year, the valve must be inspected for tightness, proper operation and corrosion protection.
In case of extreme operating conditions, such inspection is required more frequently.
