UNIWORLD Series M/UNIWORLD-M/E ed. 01 2020
WWW.CONFLOW.IT Page 5
3.1 – COMMISSIONING (GENERAL NOTES)
The valves are supplied calibrated and tested, ready to work in the conditions requested by the client during the order phase. Having
ensured all warnings have been respected, slowly open the shut-off valves upstream and downstream of the valve.
THE PACKING IS MAINTENANCE-FREE.
ATTENTION After the first working hour, check tightening of the nuts on the body unit according to the “Nut tightening
forces” table
ATTENTION Comply with the values in the “Nut tightening forces” table each time maintenance operations are carried
out.
ATTENTION If the valve is equipped with a BELLOWS seal, never rotate the stem for any reason. A possible wrong
manoeuvre could cause torsion and breakage of the bellows.
3.2 – ELECTRIC VALVES COMMISSIONING
The PSL-AMS actuators were designed as valve electrical actuators. The actuator is assembled on the value using small columns.
The mechanical power is generated by a 24 volt DC motor, which is controlled electronically using pulse width modulation (PWM). The
motor torque is transmitted from a series of cylindrical gears to a trapezoidal screw. The screw converts the torque produced into an
axial force with a screw drive. The vertical linear movement of the screw drive is self-locking and is transmitted by a connection joint to
the valve stem.
When no voltage is present or for calibration works, the actuator can be activated in emergency mode using the handwheel (see 3.2.1),
except when the PSCP fail-safe unit is used.
Figure 3: Dimensions mm – Basic Version
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