AVK SEriES 57/46 & 57/86 rESiliEnt SEAtEd gAtE VAlVES
inStAllAtion, opErAtion & mAintEnAncE mAnuAl
2. installation
•
When installing the gate valves, ensure that the seats and the flange faces are clean.
•
When valves are provided with lifting lugs, plates or eye nuts, these must be used to lift the valve.
•
To ensure adequate sealing it is important to select the correct type of gasket for the medium concerned, gaskets with the
correct flange size must be used.
•
Place valve between pipe flanges, and insert the bolts.
•
Tighten bolts loosely.
•
Tighten bolts in a diagonal sequence to ensure flanges are pulled parallel.
•
Finally tighten bolts to correct torque levels as recommended in WSA 109.
2.1. Bolts
2.1.1 Bolt size
The following table shows bolt size you should use for which valve dimensions.
2.2. gland Follower
Prior to pressurisation check gland follower nuts are finger tight. After pressurisation operate valve and check for weeping. Nip
nuts (16) until weeping stops.
Note: If nuts are excessively tightened torque operation of the valve is increased dramatically.
3. operation
Series 57/46 valves are suitable for use with clean water or neutral liquids up to 70°C. Minimum liquid temperature must
be above freezing. Insulation is essential for external temperatures on 0°C to - 10°C. The valves are operated manually by
handwheel.
AS 2129
AS 2129
table B5
table E
table F
dn Bolts Quantity
Bolts Quantity
Bolts Quantity
50 M16 4
M16 4
M16 4
80 M16 4
M16 4
M16 8
100 M16 4
M16 8
M16 8
150 M16 8
M20 8
M20 12
200 M16 8
M20 8
M20 12
225
M16
8
- -
- -
250 M16 8
M20 12
M24 12
300 M20 12
M24 12
M24 16
375 M24 12
M24 12
M27 16
400 M24 12
M24 12
M27 20
AVK Valves Pty Ltd, 559A Grand Junction Road, Wingfield, SA 5013, Australia - T: +61 8 8368 0900 - E: [email protected] - W: www.avkcivil.com.au Version number 3
COPYRIGHT©AVK GROUP A/S 2017
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