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Do not fasten actuator or any part of it to support.
Do not step on valves installed in horizontal position.
Recommended flange compression values are shown in the table.
Valve size (DN)
25 - 65 (1" - 2.5")
80 -100 (3" - 4")
125 - 150 (5" - 6")
200 (8")
250 - 700 (10" - 28")
750 - 1000 (30" - 40")
The sleeve sealing performance depends on several factors including media temperature, flange alignment, sleeve material
and allowed tolerances. If leakage is detected, tighten the flange bolts reasonably until leakage is decreased to an acceptable
minimum.
6 Operation
6.1 First use
Flowrox valves are normally delivered fully assembled and
ready to use. Check the condition of the valve visually.
After installation to the pipeline, check that all connections
are leak-proof.
6.2 During operation
During the operation the valve does not normally require any
maintenance. The sleeve change is described in 7.2.
To ensure smooth operation, it is recommended to perform
routine maintenance and replace worn parts.
Regarding the actuators, follow the instructions of the
manufacturer.
Note the valve functions, see 3.4.
4PV70EN - 5/2023
Flange type 1 mm (in)
1.5 (0.06)
2 (0.08)
2.5 (0.10)
3 (0.12)
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7
Maintenance
The sleeve is the only part of the valve which is in contact
with the medium flowing in the pipeline. With regular sleeve
changing, the likelihood of malfunctions in the process
decreases. Wear resistance of the sleeve depends on the
circumstances of the process and may vary a lot.
If there is a flow through closed valve or leakage through
bushings (PVE) or through damaged sleeve (PV), change the
sleeve immediately.
7.1
Scheduled maintenance
Include the valves in your factory maintenance program.
Maintenance tasks and service intervals are offered as a
guideline in our Maintenance Recommendation as service
intervals will vary with the applications.
Flange type 3 mm (in)
2 (0.08)
2.5 (0.10)
3 (0.12)
3.5 ( 0.14)
3.5 ( 0.14)
4 (0.16)
For safety reasons, make sure that the nature of
the medium is known or informed prior to any
maintenance activity.
CAUTION!
Harmful substance hazard.
The process medium can be corrosive or harmful.
PVE: In case of a sleeve failure, slight leakage can
occur through bushings.
PV: In case of a sleeve breakage, the flowing liquid
will leak into the environment.
Make sure the process medium is led to a safe
location.
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