Safety, 1 general – Flowserve Trunnball DL Ball Valves IOM User Manual
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NAF Trunnball DL Ball Valves NFENIM4168-00-A4 01/15
flowserve.com
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 recommendation
from Flowserve.
1 General
This instruction provides necessary information for the correct handling of the NAF Trunnball
DL ball valve. For additional equipment used together with the valve, please refer to their
corresponding instructions.
Although this instruction is made to cover a broad range of varieties of the NAF Trunnball
DL, there will inevitably be versions not covered in detail. If you have any doubt about the
correct use and handling of a specific version of NAF Trunnball DL, please contact your
Flowserve representative.
Valves intended for use on highly oxidizing media are often delivered in a
degreased version. Any valve marked with “Degreased for oxygen service” must
be handled with the greatest care and be protected from being contaminated
with grease, dust or anything else that can jeopardize its safe use.
The instructions and list of spare parts in this document are applicable to NAF Trunnball DL
ball valves in accordance with our technical bulletin.