10
EB 3009 EN
Maintenance
The pressure must not exceed the maximum
permissible constant operating pressure or
pressure acting on one side (see section 10).
The lowest pressure always applies and re-
stricts the maximum test pressure.
5.1.1 Regulation of steam
Î
Unscrew filler plug (20, width across flats
13) on the compensation chamber. Use
the included plastic funnel or a jug to
pour in water until it starts to overflow.
Screw the filler plug back in and tighten
it (25 Nm). The regulator is now ready
for operation. Open the hand-operated
shut-off valves slowly to prevent water
hammer.
5.1.2 Regulation of liquids
Î
To start up the regulator, open shut-off
valves slowly.
5.2 Set point adjustment
The user cannot adjust the set point.
The regulator is delivered with a ready ad-
justed set point of 0.2 bar/3 psi (DN 15 to
150/NPS ½ to 6) or 0.3 bar/5 psi (DN 200
and 250/NPS 8 and 10) and has been test-
ed.
The regulator is open, provided the upstream
pressure is greater than the downstream
pressure by at least the ready adjusted set
point. It closes automatically when the down-
stream pressure rises to or above the value
of the upstream pressure.
5.3 Decommissioning
Close the shut-off valves starting from the
flow pipe side.
6 Maintenance
The regulators do not require any mainte-
nance. Nevertheless, they are subject to nat-
ural wear, particularly at the seat, plug and
two diaphragms.
Depending on the operating conditions,
check the regulator regularly to detect and
rectify possible malfunctions at an early
stage.
If a diaphragm rupture is indicated and the
operating diaphragm is defective,
SAMSON's After-Sales Service department
can assist you.
Before performing any work on the regula-
tor, make sure the relevant plant section has
been depressurized and, depending on the
process medium, drained. We recommend
removing the valve from the pipeline.
Depending on the field of application, allow
the valve to cool down or heat up to reach
ambient temperature before starting any
work on it.
Disconnect or shut off the control line.
As valves are not free of cavities, remember
that residual process medium might still be
contained in the valve.
Details on faults and how to remedy them
can be found in Table 1.
WARNING
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