DESCRIPTION
Pneumatically powered,
1
/
4
turn valve actuator using modified scotch
yoke mechanism to match torque requirements of ball valves.
a WARNING: SERIES 34 ACTUATORS ARE ELECTROMECHANICAL
DEVICES SUBJECT TO NORMAL WEAR AND TEAR. ACTUATOR
LIFE IS DEPENDENT UPON APPLICATION AND ENVIRONMENTAL
CONDITIONS. IF APPLIED IN HAZARDOUS SERVICES, SUCH AS
BUT NOT LIMITED TO MEDIA TEMPERATURE EXTREMES, TOXINS,
FLAMMABLES, OR OTHER SERVICES WHERE IMPROPER OR
INCOMPLETE OPERATION COULD PRODUCE A SAFETY HAZARD,
IT IS INCUMBENT UPON THE SYSTEM DESIGNER AND THE USER
TO PROVIDE PROPER WARNING DEVICES SUCH AS
TEMPERATURE SENSORS, OXYGEN SENSORS AND FLOW
SENSORS. FLOWSERVE ALSO RECOMMENDS THAT THE
OPTIONAL AUXILIARY LIMIT SWITCHES BE USED FOR
MONITORING AND/OR ELECTRICAL INTERLOCK.
CAUTION: Flowserve recommends that all product which must be
stored prior to installation be stored indoors, in an environment
suitable for human occupancy. Do not store product in areas where
exposure to relative humidity above 85%, acid or alkali fumes,
radiation above normal background, ultraviolet light, or
temperatures above 120°F or below 40°F may occur. Do not store
within 50 feet of any source of ozone.
A. INSTALLATION
CAUTION: Ball valves can trap pressurized media in the cavity. If it
is necessary to remove any valve body bolts, stem nuts, or remove
valve from the line, and if the valve is or has been in operation,
make sure there is NO pressure to or in the valve and operate valve
one full cycle.
1. Mounting (In-line)
NOTE: It is not necessary to remove any valve body bolts or
remove valve from line in order to mount actuator.
a. Close valve (valve is closed when flats on stem are
perpendicular to the line of flow). If valve information is
marked on stop plate or handle, it will be necessary to
transfer this information to the bracket nameplate.
For
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/
4"–2" 44,
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/
4"–1
1
/
2" 59 Series top-mount style valves and
1
/
2"–2" 51/52,
1
/
2"–1
1
/
2" 82/83 Series valves with high-cycle stem
packing as standard, remove handle nut, lockwasher, handle,
separate stop plate (if any), retaining nut and stop pin(s). Add
the two additional Belleville washers with their larger diameter
sides touching each other. Add the self-locking nut to the stem
and tighten while holding the stem flats with wrench. Tighten
until Belleville washers are flat, the nut will “bottom”, and then
back nut off
1
/
3 of a 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 Belleville washers before backing off.
For 2" 59, 82/83 and 2
1
/
2" 45 valves, remove handle assembly,
retaining nut, stop and stop screws. Replace with valve stem
spacer or, if valve has graphite stem packing, with two
Belleville washers, 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.
b. Attach mounting bracket to actuator using four (4) cap
screws and lockwashers, provided in mounting kit, and
tighten securely. For small size top-mount style valves, attach
bracket such that bracket nameplate will be to side of valve.
Place coupling on valve stem.
c. Check position of indicator flats on top of actuator shaft. If
they are parallel to the line, they indicate “Open”, if
perpendicular, “Closed”. Be certain the porthole in the ball and
the indicator flats of the shaft agree.
08932-F
Series 34 Pneumatic Actuator
Installation, Operation and Maintenance Instructions
(2 strony)
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