Warex DKZ 103 Installation And Maintenance Manual page 4

WAREX VALVE GmbH
"ATEX 1" Installation and Maintenance
Manual
Installation, operating and maintenance instructions according to 94/9/EG ("ATEX") for Warex
butterfly valves of the series DKZ(E) 101, 103, 105, 110 and DKF 102
General
This operating manual is intended to enable the proper installation and trouble-free operation
of the butterfly valves (especially in accordance with DIN EN 13463-1). Therefore, you must
read and observe these installation instructions.
Failure to comply with these instructions can result in danger to life and limb and damage to the
system, which can cause the manufacturer's guarantee to become invalid.
All work on the butterfly valve must be performed by trained and experienced personnel. Only
suitable tools should be used and the personnel should be equipped with any necessary
protective clothing.
If the valve is not used immediately, it should be stored with the valve disk slightly open in the
original package in a clean, dry room.
The valves are custom-designed for a specific purpose (see Warex order or cover sheet) and
therefore may be used only for the intended purpose described therein. In accordance with these
requirements, the valve is also labeled pursuant to 97/23/EG and 94/9/EG. Important structural
elements of the valve and their function must be inspected at regular intervals.
Protective systems / devices in accordance with 94/9/EG
Protective systems consist of 2 butterfly valves of the <GS> series (surge-proof and flame
puncture proof), an intermediate container and a control unit with the EC type inspected
actuator, which ensures that at least one valve is closed. The intermediate container must be
designed in accordance with DIN 14460.
In order to enable proper operation and to ensure explosion-proof uncoupling, one butterfly valve
must always be closed.
There are two types of systems: ignition puncture proof devices (butterfly valves of the <GS>
series) included as part of a protective system (in which the control unit is considered separately)
and complete systems including type inspected controls.
For the operation as a protective system, the respective operating manuals for the controls must
be observed as well.
For protective systems, the pneumatic multiturn actuators must be double-acting and the solenoid
valves must be spring-return, closed and currentlesss. In addition, the category of the devices
used for zone distribution must correspond to the ambient conditions.
Only when they are closed and the seal of the valve disc is intact are the butterfly valves in the
series DKZ 103 GS DN50 – 500 and DKZ 110 GS DN50 – 300 (in accordance with ATEX H023
and H004) resistant to ignition explosion of propane/air mixtures, gas/air mixtures and hybrid
mixtures with similar explosive processes to propane/air mixtures, or resistant to explosion of
organic dusts in dust explosion classes St1 and St2. Furthermore, when closed, the protective
systems using series DK 103 GS butterfly valves are also resistant to ignition explosions of
aluminium dust/air mixtures and to those metallic dust/air mixtures with dust in dust explosion
class St3 (KSt≤ 500) with similar explosive processes to aluminium dust/air mixtures. Both series
can resist an explosion pressure of 10 bar.
Automated butterfly valves must be connected with an end position indicator so that the closed
condition can be determined with certainty.
They are suitable for ambient temperatures from –20 to +60°C.
For coarse-grained products such as granulates, the tight sealing of the valve may be hindered.
In this case, the valves cannot be used as a protective system, if the productless closing of the
butterfly valve cannot be ensured at all times.
WAREX-VALVE GmbH – Stauverbrink 2 – 48308 Senden
Tel. +49 (0) 2536/9958-0 – Fax +49 (0) 2536/9958-29
Revised: 05.06.09/RevD/opz (Subject to change) ATEX1-EN-D Page 1 of 8