ARI Armaturen CHECKO-D PN40 EN - Manual (Page 7)

Rev. 0040106000 1613 Page 2-7
Operating and installation instructions
CHECKO
®
-V PN6-160 / CHECKO
®
-D PN40
5.0 Installation
5.1 General notes on installation
The following points should be taken into account besides the general principles governing
installation work:
- 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.
ATTENTION !
- Remove flange covers if present.
- The interior of valve and pipeline must be free from foreign particles.
- Note installation position with reference to flow, see mark on valve. The
pressure of the medium must press against the bottom of the plug.
- Steam line systems should be designed to prevent water accumulation.
- 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.
- Suitable materials handling and lifting equipment should be used.
See data sheet for weights.
- Install the valve in horizontal pipe runs with the spindle vertical.
In vertical pipe runs the check valve must be equipped with a closing spring.
It is forbidden to install the valve upside down.
- Centre gaskets between the flanges.
- Install compensators to compensate for thermal expansion of the piping.
- Valves should be installed upside down only, if the medium being handled is
clean.
- Keep the thread and shaft of the spindle free from paint.
- 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 plug, the negative influence of pressure
shocks and high turbulences, are not transferred onto the valve.