ARI Armaturen STOBU PN63-160 EN - Manual (Page 8)

Page 2-8 Rev. 0040102002 0213
Operating and installation instructions
STOBU
®
PN63-160
- Planners / construction companies or operators are responsible for positioning and
installing products.
- The valves are designed for application, not influenced from weather.
- For application outside or in adverse environments like corrosion-promoting conditions
(sea water, chemical vapours, etc.), special constructions or protective measures are
recommended.
- Lay pipelines so that damaging transverse, bending and torsional forces are
avoided.
- Protect valves from dirt during construction work.
- Connection flanges must mate exactly.
- Connecting bolts for pipe flanges should be mounted preferably from the
counter flange side (hexagon nuts from the valve side).
At DN15-32: If valves should be mounted directly to valves, the upper flange
connecting bolts should be preferably executed with studs and hexagon nuts on
both sides.
- Valve mountings such as actuators, handwheels, hoods must not be used to
take external forces, e.g. they are not designed for use as climbing aids, or as
connecting points for lifting gear.
- With actuators mounted, you must disconnect the energy supply before starting
work.
- You must only operate the unmounted valve while observing all the safety
measures. Crushing hazard!
- Suitable materials handling and lifting equipment should be used.
See data sheet for weights.
- Valves can be installed with the stem pointing in any direction, but the prefered
stem position is vertical.
- Valves should be installed upside down only, if the medium being handled is
clean.
- Keep the thread and shaft of the stem free from paint.
- Centre gaskets between the flanges.
- Lockable stop valves must be installed in such a way that the stem is vertical
and the flow agent enters under the taper. If the valves are installed in pipelines
in positions other than specified, they must be fitted with a closing spring.
- Design with loose plug with re-setting spring
A plug damper should be used in critical applications, immediately downstream
of pumps, compressors, etc., where severe turbulence and pulsating pressure
surges may occur.
Through the damper function of the loose plug, the negative influence of
pressure shocks and high turbulences, are not transferred onto the valve.