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10.6 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) gradually.
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 remove from
valve housing (1).
•
Unfasten screw cap (8) and remove valve spindle (4, 4a, 14) from upper part of valve
(10, 10a).
•
Remove and replace cone set (3, 13).
•
Screw out seat (2) with socket wrench (AF10).
•
Remove ball (12), check and replace if necessary.
•
Grease thread of new seat (2) and screw in.
Tightening torque
Md= 70 Nm
•
For assembly see item 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) / hand lever (15).
•
Unfasten screw cap (8) and screw out valve spindle (4, 4a, 14) from upper part of valve
(10, 10a).
•
Push out packing set (5, 6, 7).
•
Carefully remove deposits on valve spindle (4, 4a, 14).
•
For assembly see item 9.5.
Danger
Caution
