Table of Contents
Advertisement
structions as well as all further instructions referred to in them.
Protective equipment such as safety boots, safety helmets, gog-
gles, protective gloves etc. must be worn during all work requiring
such protective equipment or for which such protective equip-
ment is prescribed.
Quickly closing the valve will lead to water hammers in the pipe-
line. Prior to the performance of any work on the valve and equip-
ment it must be ensured that the relevant pipeline section has
been depressurised and/or de-energised.
7.2 Inspection and operation intervals
The valve should be checked for tightness, proper operation and
corrosion at least once per year (DVGW Instruction Sheet W 392).
We recommend operating valves which permanently remain in the
same position three to four times per year.
In case of extreme operating conditions inspection should be per-
formed more frequently.
Item
Designation
1
Body
2
Disk
3
Profiled seal
4
Actuator shaft
5
Shaft of cover side
6
Bearing bush
7
O-ring of driven shaft
8
Washer
9
Seeger circlip ring
10
O-ring of cover side
11
Securing screw
Figure 13: Design and spare parts
7.3 Maintenance work and replacement of parts
7.3.1 Design
The design view in Picture 13 serves as a partial overview.
7.3.2 Recommendations for the replacement
of parts
The profiled seal, O-rings and bearing bushes have to be replaced
at the intervals demanded by the medium. The replacement inter-
vals depend on the operating conditions.
7.3.3 Cleaning and lubrication
Seals, O-rings and the profiled seal should always be slightly
greased when they are replaced. For this purpose lubricants ap-
proved for use with foodstuffs or drinking water have to be used.
Recommended lubricants:
• Profiled seal and O-rings: KLÜBERSYNTH VR 69-252
(with KTW approval for drinking water)
Manufacturer: Klüber Lubrication München AG
Quantity
Material
1
EN-JS 1030
1
EN-JS 1030 (epoxy-coated) or 1.4408
1
EPDM or NBR
1
1.4021/1.4462
1
1.4021/1.4462
3
1
NBR
1
14301
1
14310
4
NBR
6 (> DN 200
A2-70
PN 16)
Spare part
•
•
•
•
•
VAG Operation and Maintenance Instructions • 13
Advertisement
Table of Contents
