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6.2 Replacing the stem graphite packing (BFC/BRC model)
NOTE:
BFC/BRC valves do not require regular maintenance. The tightness of the graphite stem
packing should be checked once in a while. If the graphite packing leaks, the packing
should be tightened with the tightening nuts. In the assembly picture for the BFC model
(see appendix 7.2), the tightening nuts for the graphite packing have been marked with
number 1.
· Make sure that all spare parts needed for maintenance are available.
· Keep the valve and the pipeline non-pressurised whenever the gear is not connected.
· Remove the actuator as instructed in chapter 5.
· Disconnect the key (8) from the stem (9).
· Remove the clamping bush (4).
· Remove the sliding bearing (5).
· Remove the sealing rings (6).
· Clean the shaft, especially the area in contact with the clamping bush seals.
· Install the new sealing rings.
· Re-install the sliding bearing and the clamping bush.
· Install the actuator as instructed in chapter 5.
For Part numbers please refer to Parts list, Appendix 7.2.
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