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9.4 Maintenance
Carry out maintenance works and disassembly only if boiler and level
gauge are empty and pressureless.
Observe that lubricant is suitable for medium and operating
temperature. Keep spindle thread always greased.
Leakages on spindle (4,4a,14)/gland packing (6)
Re-tighten screw cap (8).
•
Life of valve can be increased by regular control on tightness.
Replacement of seat (2), cone set (3,13) and ball (12)
Screw out upper part of valve (10,10a) with valve spindle (4,4a,14) and
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remove valve housing (1).
Unfasten screw cap (8) and remove valve spindle (4,4a,14) from valve
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housing (1) / upper part of valve (10,10a).
Remove and replace cone set (3,13).
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Screw out seat (2) with socket wrench .
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Remove ball (12), check and replace if necessary.
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Grease thread of new seat (2) and screw in.
A120,A210 70 Nm
For assembly see chapter 9.5.
•
Replacement of packing set
[Base ring (5), gland packing (6), stuffing box (7)]
Screw out upper part of valve (10, 10a) with valve spindle (4, 4a, 14) and
•
remove from valve housing (1).
Unfasten handwheel (11) / handlever (15).
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Unfasten screw cap (8) and screw out valve spindle (4, 4a, 14) from valve
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housing (1, 1a) / upper part of valve (10, 10a).
Remove packing set (5, 6, 7).
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Carefully remove deposits on valve spindle (4, 4a, 14).
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For assembly see chapter 9.5.
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9.5 Assembly
1. Grease thread of valve spindle (4,4a,14) and screw in valve spindle in valve
housing (1) / upper part of valve (10,10a).
2. Insert base ring (5), gland packing (6) and stuffing box (7).
3. Screw on screw cap (8) and tighten gradually.
- spindle has to stay movable -
4. Screw in complete upper part of valve (10, 10a) with new sealing ring (9)
into valve housing (1) with tightening torque M
(This step is not applicable for the valve A110)
5. Fix handwheel (11) / handlever (15).
6. Close shutoff device.
max = 280 Nm
d
15
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