Flowserve 36 Series Electric Actuator - Manual (Page 2)

Flow Control
Worcester Actuation Systems
other. Add the self-locking nut to the stem and tighten
while holding the stem flats with a wrench. Tighten until
Belleville washers are flat, the nut will “bottom”, and then
back nut off
1 /
3
turn. The two additional Belleville washers
and the self-locking nut are included in the mounting kit.
CAUTION: The self-locking stem nut is difficult to
tighten, and must fully flatten the Belleville washers
before backing off.
For 2" 59, 2 1 /
2
" 45, and 2" 82/83 valves only, remove
handle assembly, retaining nut, stop and stop screws.
Replace with valve stem spacer, or with two Belleville
washers (if valve has graphite stem packing), and replace
retaining nut. NOTE: Belleville washers are installed with
larger diameters touching each other. Using a wrench to
prevent stem from turning, tighten retaining nut until
stem packing is fully compressed or Bellevilles, if used,
are fully flattened, then back off nut
1 /
6
turn. Excessive
tightening causes higher torque and shorter seal life.
NOTE: Valves with V51 high cycle stem packing option
installed, identified by two Belleville washers installed and
handle assembly, stop and stop screws removed, do not
require stem area disassembly.
c. Center coupling on valve stem.
d. Lower actuator/mounting bracket assembly over coupling
and onto valve, making sure that the slot in the actuator
shaft will engage male tang on coupling.
e. Secure bracket to valve using cap screws and
lockwashers provided in mounting kit. Tighten securely.
For small size top-mount style valves, the bracket
nameplate will be to the side of the valve.
II.ELECTRICAL INSTALLATION AND
ADJUSTMENT
(Refer to Figures 1 and 2)
Make conduit connection to NPT fitting on actuator base ( 1 /
2
" NPT for
10-2036).
CAUTION: In cases where the conduit connected to the actuator may
be partially or completely run underground, or through which
moisture may contact energized live parts, or where the actuator
and/or conduit is exposed to temperature differences, the conduit
should be sealed within 18" of the actuator in accordance with the
National Electrical Code.
A. Wiring Termination
The 36 Actuator wiring is done using the wire terminations
provided. One “wire nut” is used to connect the actuator’s “free”
motor lead to incoming power. Two other incoming leads are
connected at the actuator limit switch by
3 /
16
" “quick-connect”
crimp-type wiring connectors. These wiring connectors are fitted
to the NO (normally open) and NC (normally closed) terminals of
the actuator limit switch.
The actuator should be electrically grounded in accordance with
standard procedures.
See table for minimum fuse rating when overcurrent protection is
used in motor power circuit. NOTE: The table shows the minimum
rating to prevent inrush current from blowing the fuse.
TABLE 1: MINIMUM FUSE RATING FOR OVERCURRENT PROTECTION
Actuator Size AC Voltage Fuse Rating (A)
10 120 3
20 120 5
10 240 1.5
20 240 3
B. Actuator Rotation
Incoming power is alternately applied between the NO or NC
switch terminals and the “free” motor lead. When the proper
voltage is applied to the actuator its output shaft and bull gear
turn counterclockwise (CCW) when viewed from above.
C. Proper 90° Operation
The 36 Actuator is a unidirectional actuator which is designed to
stop at each 90° position of one complete rotation. This interval is
determined by the detents on the face of the actuator’s output
gear. The arm of a limit switch rides over these detents
controlling the point at which actuator motion will stop.
Mounting the actuator to the valve such that the actuator’s
conduit entry is in line with the piping will allow the following
operation:
Switch Arm Position* Valve Position
Up Open
Down Closed
*The switch arm has just hit the transition point on the gear face detent.
Rotating the entire actuator on the valve 90° (and rotating the ball
90°) so that the conduit opening is cross-line to the piping will
Figure 1
1