Emerson 350 series User manual

January 2006 350 Series Electrohydraulic Actuators
Fisher is a mark owned by Fisher Controls International LLC, a member of the Emerson Process Management business division of Emerson
Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are
not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability.
We reserve the right to modify or improve the designs or specifications of such products at any time without notice.
Fisher does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and
maintenance of any Fisher product remains solely with the purchaser and end-user.
Emerson Process Management
Fisher
Marshalltown, Iowa 50158 USA
Cernay 68700 France
Sao Paulo 05424 Brazil
Singapore 128461
www.Fisher.com
Fisher Controls International LLC 2004; All Rights Reserved Printed in USA
350 Series Electrohydraulic Actuators
(Obsolete Product)
Obsolete products may not be manufactured again in
any Fisher location under any conditions.
Recommended spare parts availability is guaranteed for
10 years after the last production on manufactured trim
replacement parts and 5 years of best effort on die cast
parts, elastomers, buyout
components, and electronic components. Post-
sale documents (such as instruction manuals)
will be available on CD Rom and the Fishweb.
Pre-sale documents (such as bulletins) for
obsolete are not included on the Fishweb or CD-
ROM.

www.Fisher.com
D100286X012
350 Series Electrohydraulic Actuators
Contents
Introduction 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type Number Description 2. . . . . . . . . . . . . . . . . . .
Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Body and Actuator 6. . . . . . . . . . . . . . . . . . . .
Hydraulic Fluid 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Connections 7. . . . . . . . . . . . . . . . . . . . . .
Power 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Signal 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Drain-Off Connection 7. . . . . . . . . . . . . . . . . .
Startup 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Zero/Span Calibration 7. . . . . . . . . . . . . . . . . . . . . .
Bypass Valve and Handwheel
Operation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bypass Valve 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bolt-On Handwheels 8. . . . . . . . . . . . . . . . . . . . . . .
Integrally Mounted Gear-Type Handwheels 9. . .
Speed Control Valve 9. . . . . . . . . . . . . . . . . . . .
Changing Actuator Action 10. . . . . . . . . . . .
Split-Range Operation 11. . . . . . . . . . . . . . . . .
Principle of Operation 11. . . . . . . . . . . . . . . . .
Lock in Last Position 11. . . . . . . . . . . . . . . . . . . . . .
Fault-Correction Guide 11. . . . . . . . . . . . . . . .
Maintenance 13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing Casing Plate Assembly 13. . . . . . . . . .
Cleaning Force Motor 14. . . . . . . . . . . . . . . . . . . . .
Cleaning Primary Restrictions 14. . . . . . . . . . . . . .
Checking and Adjusting Pump Pressure 14. . . . .
Adjusting Nozzles 15. . . . . . . . . . . . . . . . . . . . . . . . .
Low-Pressure Nozzles 15. . . . . . . . . . . . . . . . . . .
High-Pressure Nozzles 16. . . . . . . . . . . . . . . . . . .
Replacing Oil Seals 16. . . . . . . . . . . . . . . . . . . . . . .
Adaptor Plug O-Rings 16. . . . . . . . . . . . . . . . . . . .
Upper Piston Rod Seal and Piston Seals 16. . .
Lower Piston Rod Seal 17. . . . . . . . . . . . . . . . . . .
Handwheel Maintenance 17. . . . . . . . . . . . . . . . . . .
Bolt-On Handwheels 17. . . . . . . . . . . . . . . . . . . . .
Integrally Mounted Gear-Type Handwheels 18.
Figure 1. Type 350 Electrohydraulic Actuator with
Bolt-on Handwheel on Design ED Valve
W2286/IL
Mounting Actuator and Adjusting
Stem Connection 18. . . . . . . . . . . . . . . . . . . . . .
Type 350 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type 354 Actuator Mounting 19. . . . . . . . . . . . . . .
Type 354 Valve Travel Adjustment 20. . . . . . . . . .
Changing Type 354 Actuator Mounting 21. . . . . .
Parts Ordering 21. . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
72 mm (2-13/16 Inch) Yoke Boss
Bolt-On Handwheel 26. . . . . . . . . . . . . . . . . . . . .
90 mm (3-9/16 Inch) Yoke Boss
Bolt-On Handwheel 30. . . . . . . . . . . . . . . . . . . . .
127 mm (5 Inch) Yoke Boss
Integral Handwheel 30. . . . . . . . . . . . . . . . . . . . .
90 mm (3-9/16 Inch) Yoke Boss
Integral Handwheel 30. . . . . . . . . . . . . . . . . . . . .
Instruction Manual
Form 1387
June 2002 350 Actuator

350 Actuator Instruction Manual
Form 1387
June 2002
2
Introduction
Scope of Manual
This instruction manual includes installation,
operation, maintenance, and parts ordering
information for Type 350 (figure 1) and 354
electrohydraulic actuators with and without optional
cylinder bypass valve and speed control valve.
Coverage of handwheels for Type 350 actuators is
also included. Refer to separate manuals for
instructions covering the control valve and
accessories.
No person may install, operate, or maintain a 350
Series actuator without first (1) being fully trained
and qualified in valve, actuator, and accessory
installation, operation, and maintenance, and (2)
carefully reading and understanding the contents of
this manual. If you have any questions about these
instructions, contact your Fisher sales office before
proceeding.
Description
The 350 Series electrohydraulic actuators are
designed to operate sliding-stem and rotary-shaft
control valves from standard electronic input signals
and electric power supplies. These actuators contain
all the elements necessary for control valve
operation in electronic control systems. The motor,
pump, transducer, and positioner are included in the
actuator casing.
For hazardous area applications, the actuator must
be equipped with an explosion-proof motor and an
intrinsically safe control circuit. Separate use of
either an explosion proof motor or an intrinsically
safe control circuit results in an actuator with no
hazardous area rating. Refer to the motor nameplate
and actuator nameplate for additional information.
Type Number Description
Type 350—Electrohydraulic control valve actuator
with threaded stem connection for use with
sliding-stem control valves.
Type 354—Electrohydraulic control valve actuator
with splined valve shaft connection for use with
rotary-shaft control valves.
Specifications
Specifications for 350 Series actuators are shown in
table 1. Some specifications may also be found on
the actuator nameplate.
Table 1. Specifications
Input Signals(1)
See table 2
Internal Resistance of Transducer Force Motor
See table 2
Power Supply Required
See table 3
Actuator Sizes
Type 350: See table 4
Type 354:
JSize 60 for 25.4, 31.8, 38.1, 44.5 or 50.8 mm
(1, 1-1/4, 1-1/2, 1-3/4 or 2 inch) valve shaft spline
diameter or
JSize 80 for 63.5 mm (2-1/2 inch) valve shaft
spline diameter
Action
Actuators with standard control circuits are field-
reversible between
Jdirect (increasing input signal extends actuator
piston rod) and
Jreverse (increasing input signal retracts
actuator piston rod).
Actuators with intrinsically safe control circuits are
not field reversible; either a direct- or
reverse-acting coil is required.
Maximum Usable Output Thrust and Torque(3)
Type 350: See table 5
Type 354: See table 6
1. This term is defined in ISA S51.1.
2. Stroking speed with actuator operating a valve under no load.
3. Do not exceed the thrust and torque limits in this manual.
4. The temperature limits in this manual and in any applicable standard or code limitation should not be exceeded.

350 Actuator
Instruction Manual
Form 1387
June 2002
3
Table 1. Specifications (continued)
Bench Stroking Speed(2)
J8.6 mm/second (0.37 inches/second) for 8900
N (2000 pounds) output thrust or 318 NSm
(2812 lbfSin) output torque and
J3.8 mm/second (0.15 inches/second) for 22200
N (5000 pounds) output thrust or 794 NSm
(7031 lbfSin) output torque
Maximum Actuator Travel
Type 350: See table 4
Type 354: 90 degrees
Pump Type
Positive-displacement, gear-type pump with relief
valves.
Hydraulic Fluid Requirements
10.4 liters (11 quarts) of Type A automotive
automatic transmission fluid. If the actuator is
used in ambient temperatures below –4°C (25°F),
use an aircraft-type hydraulic fluid that conforms
to MIL-H-5606A specifications.
Operative Temperature(1, 4)
Weather-Proof Motor: –40 to 40°C (–40 to
104°F)
Explosion-Proof Motor: –25 to 40°C
(–13 to 104°F)
Performance
Hysteresis(1):0.50 percent of span
Load Sensitivity: Stem position change 0.3 to
1.0 percent of total travel per 488 Newton (100
pound) change in load
Terminal-Based Linearity(1):±2 percent of total
travel
Dead Band(1):Less than 0.5 percent of total
travel
Frequency Response(1):See figure 3 for typical
frequency response curves
Adjustments
Zero and span adjustments located under cover
(figure 2)
Hazardous Area Classification
Actuators with intrinsically safe actuator control
circuits are available. Intrinsically safe control
circuits are indicated by the presence of a special
actuator nameplate and require an
explosion-proof motor. Refer to the special
actuator nameplate for information concerning
use of the actuator in hazardous locations. The
motor nameplate must also specify an
explosion-proof approval.
Motor Type
See table 3. Motor type designations refer to the
motor only; not to the entire actuator.
Connections
Power: 1/2-inch NPT female conduit connection
on motor
Input Signal: 1/2-inch NPT female conduit
connection on side of casing
Seal Drain Off: 1/4-inch NPT female connection
with vent assembly on top of yoke. This
connection is furnished only on 72 mm (2-13/16
inch) and
90 mm (3-9/16 inch) yoke boss sizes of the Type
350 actuators
Approximate Weight
Type 350 without Handwheels
72 mm (2-13/16 inch) Yoke Boss: 49 kg
(110 pounds)
90 mm (3-9/16 inch) Yoke Boss: 64 kg
(142 pounds)
127 mm (5-inch) Yoke Boss: 91 kg (200 pounds)
Type 354
Size 60: 86 kg (194 pounds)
Size 80: 123 kg (275 pounds)
1. This term is defined in ISA S51.1.
2. Stroking speed with actuator operating a valve under no load.
3. Do not exceed the thrust and torque limits in this manual.
4. The temperature limits in this manual and in any applicable standard or code limitation should not be exceeded.

350 Actuator Instruction Manual
Form 1387
June 2002
4
TRAVEL
ADJUSTMENT
SCALE
BIAS
SPRING
ZERO
ADJUSTMENT
FEEDBACK
SPRING
CASING
PLATE
ASSEMBLY
Figure 2. Adjustments (Actuator is Shownwith Cover Removed)
W5568-1/IL
SPAN
ADJUSTMENT
Table 2. Input Signals, Internal Resistance, and Coil Part Numbers
PART NUMBERS
CONTROL INPUT INTERNAL Key 37* Key 81, Stainless Steel Key 124, Steel Key 166
CIRCUIT
TYPE ACTION SIGNAL,
mA dc RESISTANCE,
OHMS
Key 37*
Coil
Assembly Bias
Spring Feedback Spring Weight Weight
Key 166
Machine
Screw, Steel
1-5 2200 2H2936000A2 1H309037022 1H308937022 1H681124092 1H681424092 1F546828992
Standard Either -
Field
Reversible
4-20,
4-12,
or 12-20 260 2J5228000A2 1H309037022 1H308937022 1H681124092 1H681224092 1P4252X0012
Reversible 10-50 380 2H2935000A2 1H440337022 1H440237022 1H681124092 1H681324092 1F546828992
Intrin- Direct(1) 4-20 160 23A1732X012 1H309037022 1H308937022 1H681124092 1H681324092 1F546828992
sically
safe Reverse(1) 4-20 160 23A1733X012 1H309037022 1H308937022 1H681124092 1H681324092 1F546828992
1. Action must not be reserved. See the changing action section of this manual.
Table 3. Motor Types and Corresponding Power Supplies Required
Weather-Proof Motor Explosion-Proof Motor(1)
Electrical
Classification
of Motor
Totally Enclosed; Continuous Service—Intrinsically safe control
circuit not available with this motor Explosion-proof (see motor nameplate for specific rating). Also check for special actuator nameplate to determine if actuator
has intrinsically safe control circuit. Unless the control circuit is
intrinsically safe and the motor is explosion proof, actuator cannot be
used in hazardous atmospheres.
Type Capacitor Start, Induction Run Capacitor or Repulsion Start, Induction Run, Fan Cooled
Horsepower 1/3 1/3
Power
Supply 115/230 ±10% Vac, Single
Phase, 60 Hz 220/440 ±10% Vac, Three Phase, 50/60 Hz 115/230 ±10% Vac, Single Phase, 60 Hz 220/440 ±10% Vac, Three Phase, 50/60 Hz
Starting Cur-
rent (Amps) 31 Max @ 115 Vac
15.5 Max @ 230 Vac 8 Max @ 220 Vac 4 Max @ 440 Vac 31 Max @ 115 Vac 15.5 Max @ 230 Vac 8 Max @ 220 Vac 4 Max @ 440 Vac
Running Cur-
rent (Amps) 7.2 @ 115 Vac
3.6 @ 230 Vac 1.8 @ 220 Vac 0.9 @ 440 Vac 7.2 @ 115 Vac 3.6 @ 230 Vac 1.8 @ 220 Vac 0.9 @ 440 Vac
Speed 1725 RPM 1425/1725 RPM 1725 RPM 1425/1725 rpm
1. Explosion-proof classification pertains to the motor only, not the entire actuator.
*Recommended spare parts

350 Actuator
Instruction Manual
Form 1387
June 2002
5
13A6501-A
A1617-2/IL
Figure 3. Typical Frequency Response Curves
NOTE:
FOR 71mm (2-13/16 INCH) YOKE BOSS SIZE TYPE 350 AC-
TUATOR WITH 1 TO 5 mA DC INPUT SIGNAL (5% INPUT
AMPLITUDE) AND 8896 N (2000 POUNDS) OUTPUT THRUST
13 mm
(1/2 INCH)
TRAVEL
13 mm
(1/2 INCH)
TRAVEL
29 mm
(1-1/8 IN)
TRAVEL
29 mm
(1-1/8 IN)
TRAVEL
76 mm
(3- INCH)
TRAVEL
76 mm
(3- INCH)
TRAVEL
mm
(INCH)
Table 4. Maximum Actuator Travel for Type 350
YOKE BOSS SIZE TRAVEL
Types mm Inch mm Inch
350 without handwheel 72
90 or 127 2-13/16 3-9/16(1) or 5 38 76 1-1/2 3
350 with handwheel 72
90
127
2-13/16
3-9/16(1)
5
38
64
76
1-1/2
2-1/2
3
1. An actuator with this yoke boss size uses a 19.1 mm (3/4-inch) stem. When this size actuator stem is used, the valve stem must be less than the standard length.
Table 5. Usable Thrust Output of Type 350 Actuators at Maximum Travel(1)
Actuator Type 350
(w/ or w/o handwheel)
Yoke Boss Size, mm (Inch) 72
(2-13/16) 90 or 127 (3-9/16 or 5)
Travel, mm (Inch) 38
(1-1/2) 64 or 76 (2-1/2 or 3)
Gross Cylinder
Output Thrust, N (Lb) 8896 (2000) 8896 or 22240 (2000 or 5000)
Usable Output
Thrust, N (Lb) 8896 (2000) 8996 or 22240 (2000 or 5000)
1. Thrusts given are the thrusts available for operation of control valves. Under some conditions, such as with the valve plug stalled, higher thrusts can be developed. The control valve
stem must be capable of withstanding this higher thrust.

350 Actuator Instruction Manual
Form 1387
June 2002
6
Table 6. Usable Torque Output of Type 354
Size 60 and 80 Actuators at Maximum Travel
Gross Cylinder
Output Thrust, N (Lb) 8800 (2000) 22000 (5000)
Valve Disk or Ball
Rotation, Degrees 0-90 0-90
Usable Torque Output,
NSm (LbfSin) 318
(2812) 794(1)
(7031)(1)
1. Do not exceed torque capabilities of the valve shaft.
Table 7. Side-Mounted Handwheels for Type 350 Actuators
OPERATION
YOKE BOSS
SIZE, mm
(INCHES) HANDWHEEL TYPE Positioning of Valve Use As
Travel
Stop
Action Required
for
Unrestricted Travel
MAXIMUM ACTUATOR
TRAVEL WITH
HANDWHEEL, mm (INCHES)
Non-Declutchable Open or Close Up or Down Neutral Position
72
(2-13/16) Bolt-on Declutchable Open, Close, or Throttle ––– Neutral Position &
Disengage Pin 38 (1-1/2)
Non-Declutchable Open or Close Up or Down Neutral Position 51 (2)
90
(3-9/16) Bolt-on Declutchable Open, Close, or Throttle ––– Neutral Position &
Disengage Pin 64 (2-1/2)
127
(5) Integrally Mounted Open, Close, or Throttle(1) Up or Down Neutral Position & Disengage Pin 76 (3)
1. Can also open or close valve in emergency without inserting engaging pin.
Installation
WARNING
Always wear protective gloves,
clothing, and eyewear when
performing any installation operations
to avoid personal injury.
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
Key numbers referenced in the following procedures
are shown in figure 7 except where indicated.
These actuators are normally shipped as part of a
control valve assembly. That is, the actuator will be
mounted on a control valve body and the connection
between the actuator piston rod and valve will be
assembled when the unit is received. Complete
instructions for the valve body are provided in a
separate manual.
If the actuator has been shipped separately for
mounting on a control valve body or if the control
valve body and actuator have been separated for
maintenance, attach the actuator to the valve by
following the appropriate steps in the mounting
actuator section. Complete the remaining installation
sections, and then complete the Actuator Mounting
and Adjusting Stem Connection procedures.
Valve Body and Actuator
Install the valve body in the pipeline by following
instructions in the appropriate valve body instruction
manual. (Some rotary valves must be out of the
pipeline in order to determine the closed position for
actuator adjustment. These valves should remain
out of the line until the actuator has been mounted
and adjusted.)
For proper operation, the actuator must be installed
in a vertical position above the control valve body.
Hydraulic Fluid
Clean the casing plate (key 19) to be certain no dust
or other foreign material enters the casing (key 5).
Unscrew the vent assembly (key 92). When filling
the reservoir, use a funnel having a fine-screen
strainer to prevent solid impurities from entering the
casing.
Use approximately 10.4 liters (11 quarts) of type A
automotive-type automatic transmission fluid. If the
motor and pump are to be started at ambient
temperatures below –4°C (25°F), use an
aircraft-type hydraulic fluid (conforming to
MIL-H-5606A specifications).

350 Actuator
Instruction Manual
Form 1387
June 2002
7
Fill the reservoir to the centerline of the sight gauge
(key 112). Replace the vent assembly after filling.
Electrical Connections
Power
Make power connections through the conduit
connection on the motor. Refer to the wiring tag
attached to the motor for instructions.
CAUTION
Reversed motor rotation may damage
the pump. Correct rotation is
counterclockwise when viewed from
the motor output shaft (clockwise
when viewed from the fan end of the
motor). Motor rotation is also indicated
by an arrow on the motor mounting
bracket.
Input Signal
Note
For intrinsically safe installations, refer
to the special nameplate and the
instructions provided by the barrier
manufacturer for proper wiring and
instructions. Do not attempt to reverse
the action of an actuator with an
intrinsically safe control circuit—refer
to the warning in the Changing
Actuator Action section.
Remove machine screws and junction box cover
(keys 86 and 85) from the bottom of the actuator
casing.
Insert the signal wires through the 1/2-inch NPT
female connection in the side of the actuator.
Provide a suitable conduit connector.
For direct-acting actuators (increasing input signal
extends actuator piston rod), connect the positive
input signal wire to the positive (+) terminal and the
negative wire to the negative (–) terminal. For
reverse-acting actuators (increasing input signal
retracts actuator piston rod) with standard control
circuits, reverse the input wires on the terminals.
Seal Drain-Off Connection
Some variations of these actuators are equipped
with a double piston rod seal. If so equipped, the
actuator is furnished with a vent (key 113, figure 8)
installed in the yoke. This vent allows draining of oil
that leaks past the high-pressure piston rod seal
(key 12). If the drained oil will create a fire hazard,
remove the vent and install a remote drain pipe to
carry leakage to a safe location.
Startup
Key numbers referenced in this procedure are
shown in figure 7. Follow this procedure to ensure
that the actuator is operational before putting it into
service. Remove cover screws and cover (keys 88
and 87) from the top of the actuator.
Note
The machine screw (key 123) and two
locknuts are installed in the force
motor to protect the force motor
during shipping. The force motor will
not function until this screw is
removed. Do not replace the screw
unless the actuator is to be moved.
Start motor and allow pressure lines to fill. Loosen,
but do not remove, the pipe plug (key 114) on top of
the piston rod. Allow air bubbles to bleed through the
pipe plug connection until the bubbles cease to
appear. Tighten pipe plug. Adjust per the following
section.
Adjustments
Before adjusting the zero and span, adjust the travel
adjustment scale (see figure 2) to the travel required.
Be certain the stem connector has been properly
installed and adjusted per the Mounting Actuator and
Adjusting Stem Connection section. If the actuator is
equipped with an optional handwheel, be certain the
handwheel engaging pin has been pulled out (if the
handwheel is equipped with an engaging pin) and
that the handwheel pointer is at the neutral position
before proceeding.
Zero/Span Calibration (see figure 2)
With power connected to the motor, adjust the input
signal to the signal (direct or reverse acting) which
should correspond to the full up position of the piston

350 Actuator Instruction Manual
Form 1387
June 2002
8
rod assembly. Rotate the zero (bias spring)
adjustment screw until the piston rod just begins to
move down. Change the input signal to the opposite
end of the input signal range and check the position
of the piston rod assembly. If the rod has moved less
than full travel, it indicates that the feedback spring
has too much tension and that the span (feedback
spring) adjustment screw is screwed into the spring
too far. If the rod has moved full travel, start moving
the input signal in the opposite direction to see
where the piston rod assembly starts to move. This
indicates if there is enough spring screwed onto the
span adjustment. After each adjustment of the span
(feedback spring) adjustment screw, the zero (bias
spring) adjustment screw must be adjusted for the
starting point (full up).
Bypass Valve and Handwheel
Operation
Bypass Valve
Before using a handwheel, open the bypass valve
(key 76, figure 7) so that fluid pressure will be
equalized on either side of the actuator piston.
Failure to equalize the pressures may make
handwheel operation difficult or impossible.
Note
If the actuator is equipped with
optional lock valves, the bypass must
be opened to allow handwheel
operation even if the motor has been
turned off.
To open the bypass valve, rotate the bypass valve
stem (key 77, figure 10), located on the side of the
actuator, counterclockwise. This rotation direction is
indicated by an arrow on the bypass plate (key 79,
figure 10). Rotate the stem only enough to open the
valve (2 to 4 turns). Further rotation might damage
the bypass plate (key 79, figure 10).
Handwheels for use with the Type 354 actuator are
covered in separate manuals. Refer to the Type
1076 handwheel or other handwheel instruction
manual as appropriate.
Bolt-On Handwheels
Bolt-on handwheels (see figure 13) are available in
either of two types, non-declutchable and
declutchable. The non-declutchable type is shown in
figure 13. With this type, there is no declutching
mechanism, but the design of the handwheel nut
allows unrestricted actuator travel when the
handwheel is positioned so that the pointer (key 160,
figure 13) is at the neutral position. The handwheel
can be used to open or close the valve if used with a
Type 350 actuator (see table 7).
To operate the non-declutchable handwheel,
open the bypass valve and rotate the handwheel
clockwise to close or counterclockwise to open the
valve. The non-declutchable handwheel can also be
used as a travel stop to limit either full opening or
closing of the valve. With the handwheel pointer at
the neutral position, travel is not restricted. As the
pointer is moved from the neutral position, the
handwheel mechanism will restrict travel in an
increasing amount. Moving the pointer from the
neutral position with clockwise handwheel rotation
will restrict opening of the valve (counterclockwise
rotation will restrict closing of the valve). The
handwheel cannot be used to restrict opening and
closing at the same time.
The declutchable bolt-on handwheel is similar to the
handwheel shown in figure 13 except that the lever
pin (key 153, figure 13) is replaced by a removable
engaging pin (not shown). Unrestricted actuator
travel is possible when the engaging pin is pulled out
(engaging pin is retained by a cotter pin) and the
handwheel is positioned so that the pointer (key 160,
figure 13) is at the neutral position. The declutchable
handwheel can be used to open, close, or throttle
the valve regardless of the actuator type.
To operate the declutchable handwheel, open the
bypass valve. Rotate the handwheel to align the
engaging pin holes in the levers (key 146, figure 13)
with the hole in the handwheel body (key 142, figure
13). Insert the engaging pin. Rotate the handwheel
clockwise to close or counterclockwise to open the
valve. Install the cotter pin to retain the engaging pin.
The declutchable handwheel cannot be used as a
travel stop.
If the actuator is moved from a valve having
push-down-to-close action to one having
push-down-to-open action or vice versa, a new
handwheel nut and screw must be installed to retain
counterclockwise-to-open handwheel action. Follow

350 Actuator
Instruction Manual
Form 1387
June 2002
9
the handwheel disassembly instructions in the
Maintenance section to change the nut and screw.
Integrally Mounted Gear-Type
Handwheels
Handwheels furnished on the 127 mm (5-inch) yoke
boss size Type 350 are integrally mounted types as
shown in figure 14. For the 127 mm (5-inch) yoke
boss size Type 350 actuator, unrestricted actuator
travel is possible when the engaging pin (key 159,
figure 14) is pulled out and the handwheel is
positioned so that the pointer (key 158, figure 14) is
at the neutral position. The handwheels can be used
to open, close, or throttle the valve.
To operate the handwheel on 127 mm (5-inch) yoke
boss size Type 350 actuators, open the bypass
valve. Rotate the handwheel to align the engaging
pin holes in the sleeve (key 170A, figure 14) with the
hole in the piston rod (key 170B, figure 14). Insert
the engaging pin. Rotate the handwheel clockwise to
close or counterclockwise to open the valve.
With the integrally mounted handwheel on Type 350
actuators, the valve can be opened or closed in an
emergency without inserting the engaging pin.
Rotate the handwheel until the sleeve (key 170A,
figure 14) contacts either the stem connector or
travel stop nut (keys 2 and 178, figure 14). Once the
sleeve contacts the connector or travel stop nut,
further movement of the sleeve will move the piston
rod to open or close the valve.
Either integrally mounted handwheel type can be
used as a travel stop to limit either full opening or
closing of the valve. With the handwheel pointer at
the neutral position (and the engaging pin pulled out
for Type 350 actuators), travel is not restricted. As
the pointer is moved from the neutral position, full
travel will be restricted in one direction when the
travel stop nut or stem connector (keys 178 and 2,
figure 14) contacts the sleeve (key 170A, figure 14).
Moving the pointer from the neutral position with
clockwise handwheel rotation will restrict opening of
the valve (counterclockwise rotation will restrict
closing of the valve). The handwheel cannot be used
to restrict opening and closing at the same time.
If the actuator is moved from a valve having
push-down-to-close action to one having
push-down-to-open action or vice versa, reassemble
internal parts as follows to retain
counterclockwise-to-open handwheel action.
Remove the retainers, handwheel, bearings, and
worm (keys 180, 182, 190, and 181; figure 14).
Re-install these parts in the gear case opening
opposite the opening from which the parts were
removed. Refer to the disassembly instructions in
the Maintenance section for assistance.
Table 8. 350 Series Feedback Spring Cutting Details
Coil MA Signal Use
Feedback Spring Cut Feedback Spring to:
2J5228000A2
2J5228000A2
2J5228000A2
2H2935000A2
4-20
4-12
12-20
10-50
1H308937022
1H308937022
1H308937022
1H440237022
22-1/2 coils
Do not cut
Do not cut
26-1/2-30-1/2
coils
2H2936000A2
23A1732X012
23A1733X012
1-5
4-20
4-20
1H308937022
1H308937022
1H308937022
30-1/2 coils
22-1/2 coils
22-1/2 coils
1H3089-C
A3925/IL
Speed Control Valve
The optional speed control valve (see figure 12) can
be used to restrict stroking speed in either direction
of piston rod travel and can be reversed in the field
to reverse the direction in which stroking speed is
restricted. The speed control valve is located under
the cover (key 87, figure 7) and is installed in the
cylinder pressure line connected to the bottom of the
cylinder. When the valve is installed with the arrow
(see figure 12) pointing away from the cylinder, fluid
flows freely to the bottom of the cylinder. Stroking
speed to retract the piston rod is not restricted.
However, when the piston rod is being extended,
return fluid flow from the bottom of the cylinder is
restricted by the speed control valve. This restricts
stroking speed to extend the piston rod.
The amount of restriction can be adjusted by rotating
the control valve (key 220, figure 12) stem.
Clockwise rotation increases the amount of
restriction. If it is desired to restrict stroking speed in
the opposite direction, unscrew machine screws (key
222, figure 12) and remove the straps (key 221,
figure 12). Remove the speed control valve and
reverse it in the cylinder pressure line. Re-install
straps and machine screws. The arrow on the speed
control valve body indicates the direction of
adjustable fluid flow through the valve.