2
NAF Duball DL Ball Valves NFENIM4163-00-A4 05/17
Contents
SAFETY 2
1 General
2
2 Lifting
3
3
Receiving Inspection
3
4 Installation
3
5
Operating sequence
4
6 Commissioning
6
7 Operation
6
8
Bill of Materials and recommended spare part kits
7
9
Ordering of spare parts
8
10 Maintenance
8
10.1 Removing the valve from the pipework
8
10.2 Disassembling the valve for inspection and replacement of ball,
seats and stem packing
8
10.3 Reassembly of the valve
9
10.4 Replacing seat rings
9
10.5 Replacing the Pocket ball
10
10.6 Replacing the stem packing
10
11 Fitting an actuator to the Pocket Valve
11
SAFETY
• Assess all risks to eliminate the possibility 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 media.
• Never operate a valve without first ensuring there is no risk
of crush injuries. The risk is highest with automated valves.
Take necessary safety precautions to avoid unintentional
stroking of the actuator / valve.
• Never dismantle a valve or part of a valve without ensuring
the line is free of pressure and media.
• Ball valves must always be dismantled in the semi-open
position to avoid trapping pressure and media.
• Always check that the valve type and material is suitable for
its intended use. This applies especially to highly oxidizing
and corrosive media. Observe also the risk of erosion or
explosion, as well as decaying medium. If in doubt, always
request a written recommen
dation from Flowserve.
1 General
This instruction provides necessary information for the correct
handling of the NAF Duball DL Pocket Valve. For additional equipment
used together with the valve, please refer to their corresponding
instructions.
If you have any doubt about the correct use and handling of a specific
version of NAF Duball DL Pocket Valve, please contact your Flowserve
representative.
The instructions and list of spare parts in this document are applicable
to the NAF Duball DL Pocket Valve in accordance with our Technical
Bulletin NFENTB4163.
As the NAF Duball DL Pocket Valve is a special applications valve,
special terms and conditions may apply. Please refer to specific
purchase.
