7. MAINTENANCE
7.1 CLEANING AND LUBRICATION
AVK channel penstock needs practically no maintenance. In order to assure maximum performance of the channel penstock,
the following maintenance inspections shall be carried out periodically every 6 months:
•
Stem and stem nut shall be cleaned and greased. For non-rising stem configurations, the stem may be in contact with
water and dirt. Under these conditions, the threads of the stem and/or stem nut may wear, and they shall be checked every
3 months.
•
Clean the penstock with clear water and remove any deposits, especially on the seals and in the guides.
•
Check the seals and make sure they are not damaged. Seals shall be replaced if damaged.
See section ‘Maintenance: Seal replacement’ for detailed procedures about seal replacement.
•
Seals shall be wet while operating. If the penstock has not been used for a long period of time under dry conditions, the
seals shall be wetted with clear water before operating the channel penstock. Operating the slide with dry seals may
damage the seals. Additionally, more torque may be required to operate the channel penstock.
7.1.1 SPARE PARTS
AVK does not recommend stocking any spare parts by the owner of the equipment as the channel penstocks are designed for
a very long life cycle. If a repair part is required, please contact an AVK representative and provide the following information:
•
AVK order number
•
AVK ”General Arrangement Drawing” number
•
Project name (if applicable)
•
Vendor’s company name
Materials needed for maintenance and seal replacement:
7.2 SIDE SEALS AND BOTTOM SEAL REPLACEMENT
The following procedure describes how to replace the channel penstock’s lateral seal, bottom seal or both seals.
Note that in any case, first the slide shall be removed from the frame. The frame does not need to be removed.
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MI ChannelPenstock772 rev AB August 2014 GB
INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK CHANNEL PENSTOCKS
SERIES 772/71
Material
Type
Recommended or equivalent
Grease
Silica-gel silicone grease
Verkos il G-2
Glue
Instant adhesive
Loctite 495
