Flowserve NAF-Setball ball sector valve - Manual

1
NAF-Setball ball sector valve
Maintenance and installation instructions
List of spare parts
Fi 41.51(7)GB
08.11
Contents
SAFETY
General 1
Lifting 2
Receiving inspection 3
Installation 4
Flange gaskets 5
Starting up 6
List of materials and spare parts 7
Ordering of spare parts 8
Maintenance 9
To remove the valve from the pipework 9.1
To change the stem seal of O-ring type 9.2
To inspect and change the upper stem sealing,
Boxpacking 9.3
To inspect and change the upper stem sealing,
Boxpacking Zebra-CL™ 9.4
To inspect and change the upper stem sealing,
Boxpacking Safeguard 9.5
To change the gasket at the lower stem 9.6
To inspect and change the primary and secondary
exhaust fuse 9.7
Fitting the actuator to the valve 10
SAFETY
- Assess all the risks to eliminate the risk of personal
injury and material damage. Read these instructions
thoroughly!
- Always use the necessary protective equipment
and comply with applicable safety directives when
working with hazardous or hot/cold medium.
- Never operate a valve without first ensuring that there
is no risk of crush injuries. The risk is highest with
automatic valves.
- Take necessary safety precautions to prevent
unintentional manoeuvre - i.e to atmosphere.
- Never dismantle a valve or part of a valve without
ensuring that the line is free of pressure and any
content.
- Always check that the valve type and material is
suitable for its intended use. This applies especially to
highly oxidising and corrosive medium. Observe also
the risk of erosion and explosion as well as decaying
medium. If in doubt, always request a written
recommendation from NAF AB.
1. General
The instructions and list of spare parts as follows
are applicable to NAF-Setball ball segment valves in
accordance with data sheet Fk 41.51GB and Fk 41.54GB.
The product codes of NAF-Setball valves are as follows:
878XEX-XXXX -XX
2. Lifting
All lifting must be carried out
in the valve itself and not in the
actuator. The joint between the
valve and the actuator is de-
signed principally for carrying
the operating torque and the
deadweight of the actuator - see
Fig. 1.
Fig.1 Lifting of the valve
3. Receiving Inspection
All valves leaving our works are inspected and tested in
accordance with the relevant requirements or in accordan-
ce with the special conditions specified by the purchaser.
Valves equipped with actuators are subjected to functional
testing and are adjusted in such a manner that every unit
is completely ready for direct installation in the pipework.
However, in view of damage that may have occurred
during transport, it is advisable that receiving inspection
is carried out, if possible.
We suggest the following inspection procedure:
- Check that the valve delivered is correct in
terms of type, size, equipment, etc.
- Examine the valve, actuator and valve positioner
regarding possible damages.
- Check the settings of the limit stops.