IM-IBR17-49IN Issue 118
Servicing:
-
With suitable isolation, repairs can be carried out with the trap in the pipeline.
-
When reassembling, make sure that all joint faces are clean and the dowel locates in
the cover.
Dowel
Steam lock
release assembly
19 + 21
2
2
3
20
Bimetallic air vent assembly 17
How to fit the main valve assembly for DN15, DN20 and DN25:
-
Unscrew the support frame (9), pivot frame (10) and the valve seat (5).
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Ensure the seat/gasket faces are clean and dry.
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Fit the new gasket (6) and the valve seat (5) to the body (Do not use gasket paste).
-
Attach the support frame (9) and pivot frame (10) to the body with the assembly set
screws (7) but do not tighten.
-
Fit the float arm (8) to the pivot frame (10) using the pin (11) and by moving the complete
assembly centre the valve head onto the seat orifice.
-
Tighten the assembly set screws (see Table 1 for the recommended tightening torques).
18
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