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such that the flow direction of the fluid corresponds to the
direction shown by the arrow cast on the valve body. If no
directional arrow is cast on the valve body, the valve can be
installed in any position.
6.2.1 Shut-off valves
Shut-off valves can be installed in any position; however, the
best installation position is with the stem pointing vertically
upwards. Valves with bellows should not be installed with the
stem pointing downwards, if possible, to prevent dirt deposits
between the folds of the bellows.
Shut-off valves must be installed in the line so as to ensure
that the fluid enter the valve beneath the disc and flows out
above the disc. However, they can also be installed in lines
with alternating flow. If the valves are to be used for throttling
applications, a throttling plug must be used. For flow
incidence on throttling plugs please refer to the respective
type series booklets. If in doubt, please contact the KSB
factory.
6.2.2 Non-return valves
To ensure proper operation, non-return valves must always
be installed in such a way that the fluid enters the valve
beneath the check valves disc. When equipped with a spring,
they can be used in both pipe with upward flow and pipes
with downward flow.
Non-return valves without closing spring shall only be
installed in horizontal position with the cover pointing
upwards in horizontal pipes.
6.2.3 Strainers
Strainers shall always be installed in such a way that the fluid
flow through the strainer insert from the inside towards the
outside (cage effect of the strainer insert)
We recommend fitting shut-off valves in the pipeline on both
side of the strainer, so that the strainer can be replaced or
cleaned without having to drain the entire system. Strainers
shall be installed with sufficient clearance for removing the
strainer insert, In both horizontal and vertical pipes, we
recommend to install the strainer with the strainer insert
hanging downwards to facilitate cleaning. compliance with
the directional arrow is essential. On strainers with magnetic
insert we recommend to remove the entire cover to clean the
magnet.
Please note: When replacing the strainer insert make sure
that the weld of the insert is not located in the strainer outlet
port, so as to attain an optimum (high) Kv valve.
6.2.4 Special designs
Valves with separate throttling plug shall always be installed
in such a way that the pressure to be sealed off lies beneath
the disc, to ensure a reliable throttling effect.
For higher differential pressures integral throttling plug/stem
connections are required. In such cases we recommend to
install the valves so that the pressure lies above the disc.
If you have questions concerning optimum valve selection or
permissible differential pressures for valves with throttling
plugs, please contact the valve manufacturer.
Drainage, vent or manual start-up pipes are normally fitted
with valve combinations consisting of a shut-off valve
(pressure beneath the disc) and a throttling valve (integral
throttling plug /stem connection, pressure above the disc)
Valves with pilot plug are always installed so that
the pressure to sealed off lies above the plug
If the valves are to be used as dead-end valves, double
shut-off should be ensured for safety reasons.
6.3 Installation instructions
6.3.1 Flanged valves
The mating flange faces must be clean and undamaged.
The gaskets on the mating flanges must be properly
centred. Only fasteners and sealing elements made
of approved.
Materials shall be used. For the flange connection between
valve and pipe use all flange bolt holes provided.
Use suitable tools to tighten the bolts evenly and crosswise
at the permissible torques.
6.4 Valves with actuator
Valves with transmission gear and /or actuators must be
installed with the stem in vertical position, if possible, if this
