Flowserve IOM Control Valves - Manual (Page 19)

19
EN
• Are the piping flanges equiaxial and parallel and does the
distance between pipe ends correspond to the valve length?
If not, excessive tension, valve malfunctions and leaks at the flange connections
may result.
• Is the piping routed correctly and is the valve free from
additional piping forces?
If not, leaks may develop and, depending on the situation, the valve may fail.
• Is the installation position of the valve with vertical valve
spindle achieved?
If not, increased wear in the stuffing box packing, leaks and, depending on the
situation, rubbing may occur.
Contact the manufacturer if the prevailing installation conditions mean that the
valve will have to be fitted horizontally.
• Is there a suitable surge section upstream and downstream
of where the valve is installed?
The absence of a surge section can create critical operating conditions and
cause impermissible levels of noise and vibration!
• Is appropriate equipotential bonding provided?
Impermissible electrical compensating currents across the valve and the actuator
can generate static and cause electrical discharging.
In explosive atmospheres, the only valves that may be used
are those that comply with the permitted group, equipment
category and temperature class requirements laid down in
Directive 94/9/EC (ATEX)!
Recommended installation
Successful use of the control valve is conditional on
the availability of a suitable installation environment.
We suggest that the recommended values be adhered to, as it is very important to take
account of physical aspects when using the control valve. Deviations can result in significant
control deviations, and in the worst case expensive rerouting of the piping will be necessary.
However, some physical processes will permit a deviation from these values, although in such
cases system knowledge is required, as is the express approval of the manufacturer.
Recommended installation for
control valves
Control valve
Dirt trap
(0.1 mm)
Medium
Installation distance from valve 10 x DN
(at least 1m)