Operating Instructions for ERHARD NON SLAM Nozzle Check Valve
2
Maintenance
Control of the performance and tightness of the ERHARD NON SLAM Nozzle Check
Valve is to be done at regular intervals according to DVGW print W390. Inspection or
repair of the valve must not be carried out before the pipe section in which the valve is
installed has been isolated and made pressure-less.
Warning
WARNING
Before carrying out maintenance work on the
valve, any pressurised pipeline has to be
made pressure-less and to be secured
against re-starting!
After finishing the maintenance work, any
connection has to be checked for tightness
and close fit.
Danger
DANGER
In case of penetration of dangerous liquids, substances, gases, and
steams, immediately the plant has to be shut down, the responsible
supervisor must be informed and appropriate repair work has to be
carried out.
The personal protective equipment according to the rules of the
employer's liability insurance association must be used. Depending
on the flow medium, there is the risk of poisoning, causticization,
scalding, and danger due to biological and microbiological
substances as well as the risk of fire and explosion!
BA43E000
Juli 2009
Rev.9
ERHARD GmbH & Co. KG
x
D-89502 Heidenheim
x
Postfach 1280
Telefon: (07321) 320-0
(07321) 320 491 E-Mail: info
@
erhard.de
Internet: http://www.erhard.de
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