NIBCO UL Bronze Gate Valves - Manual (Page 7)

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5.0 MAINTENANCE
5.1 TOOLS AND EQUIPMENT
Standard wrenches and tools are suitable for servicing valves as follows:
A. For removing bonnet of the union type – a chain wrench is normally used or the
appropriate socket that will fit the bonnet union nut. For screw in type bonnets –
generally a socket wrench or open end wrench may be used if extreme caution is
used. Pipe wrenches on union nuts or screw in bonnets have a definite crushing
action which will deform the component and are not recommended.
A Standard packing tool can be used and/or a blunt hook is generally used to
remove packing rings. A screwdriver can be used to raise the packing gland (if it is in
the fully down position) and generally open end wrenches are used to tighten the
packing nut.
DOES NOT APPLY TO FIRE PROTECTION VALVES.
For any technical enquiries please call NIBCO Technical Services.