"mc" series - Milwaukee Valve

"mc" series - Milwaukee Valve
INSTA L L ATION
O P E R ATION &
MAINTENANCE
MANUAL
5TH EDITION
MILWAUKEE CONTROLS "MC" SERIES
RACK AND PINION PNEUMATIC ACTUATORS
Milwaukee Valve Company
2375 S. Burrell Street
Milwaukee, WI 53207
Phone: (414) 744-5240
Fax: (414) 744-5840
Website: www.milwaukeevalve.com
TABLE OF CONTENTS
1-1
INTRODUCTION ......................................................................................... 2
2-1
STORAGE ..................................................................................................... 2
3-1
OPERATING CHARACTERISTICS SPRING RETURN..............................2
3-2
OPERATING CHARACTERISTICS DOUBLE ACTING.................3
4-1
ACTUATOR INSTALLATION....................................................................4-5
5-1
DISASSEMBLY PROCEDURE .................................................................5-6
5-2
LOW TEMPERATURE O-RING INSTALLATION..........................7
6-1
REASSEMBLY PROCEDURE . .................................................................8-9
7-1
SPRING INSTALLATION.............................................................................10
8-1
SOLENOID VALVE CHARACTERISTICS............................................10-11
8-2
SOLENOID VALVE INSTALLATION.........................................12-13
8-3
SOLENOID VALVE INSTALLTION-EXPLOSION PROOF...........14
9-1
SPEED CONTROL DEVICES......................................................................15
10-1
CCW TO CCCW CONVERSION............................................................15-16
11-1
ACTUATOR SIZING.....................................................................................16
11-2
DOUBLE ACTING ACTUATORS..................................................16
11-3
SPRING RETURN ACTUATORS..............................................16-17
12-1
EXTENDED FINAL LIMIT STOPS.............................................................17
13-1
DOUBLE LIMIT STOPS..............................................................................18
14-1
ACTUATOR DIMENSIONS.........................................................................19
15-1
MILWAUKEE CONTROLS TECHNICAL INFORMATION.................... 20
16-1
MILWAUKEE CONTROLS ACTUATOR MATERIAL TABLE..................21
17-1
WARRANTY INFORMATION .................................................................. 22
1-1
INTRODUCTION
Milwaukee Controls offers one of the largest ranges of pneumatic rack and pinion actuators on the
market. Milwaukee actuators are designed to operate with pressurized air, but will function equally as well
with hydraulic fluid, water or inert fluids. Our actuators are designed to operate within the pressure range of
20 PSIG to 150 PSIG and are offered in two styles: the Double Acting model and the Spring Return. The
double acting model is available in 90o, 120o,135o and 180o versions. The Spring Return version is available
only as a 90o model. The double acting and spring return actuators can easily be field converted to other
configurations by insertion or removal of the unique patented Milwaukee Controls spring cartridges.
2-1
STORAGE
All Milwaukee actuators are factory lubricated for 2,000,000 cycles under normal operating conditions.
The actuator ports are plugged to prevent liquids or other materials from entering the actuator during shipment. If
the actuators are to be stored for a long period of time before installation, the units should be stroked periodically
to prevent the seals from setting. (Note: the plugs must be removed in order to stroke actuator.) Storage should
be indoors and the units should be protected against humidity and other harmful elements.
A
B
A
B
CLOSED POSITION
Figure 1. A
A
OPEN POSITION
Figure 1. B
B
A
OPEN POSITION
Figure 1. C
B
CLOSED POSITION
Figure 1. D
FIGURES 1. A - 1. D
Cut away top view of the Milwaukee Spring Return actuator.
1. A-1.B Closed Clockwise
1.C-1.D Closed Counter Clockwise
The Milwaukee actuator has simple operational characteristics. Port A is connected to the interior
cavity between the pistons. Port B is connected to the end cap cavities. In figure 1.A, we see allowing air to
exhaust through Port A, we have the normally closed position for the actuator. If we pressurize Port A, as in
figure 1.B, the pinion will rotate in the counter clockwise direction and we see the open position of the
actuator. (Note: in the case of air failure, spring return actuators will satisfy the conditions shown in Figures
1.A and 1.C using the stored energy of the springs.)
2
3-2
OPERATING CHARACTERISTICS (DOUBLE ACTING)
A
B
A
B
CLOSED POSITION
Figure 1. E
A
OPEN POSITION
Figure 1. F
B
A
OPEN POSITION
Figure 1. H
B
CLOSED POSITION
Figure 1. I
FIGURES 1.E - 2.I
Cut away top view of the Milwaukee Double Acting actuator.
1. E-1.F Closed Clockwise
1.H-1.I Closed Counter Clockwise
The Milwaukee double acting actuators has simple operating charateristics. Port A is connected to
the interior cavity between the pistons. Port B is connected to the end cap cavities. In Figure 1.E, we see
that pressurizing port B we have the closed position of the actuator. If we pressurize Port A and exhaust
B, as in Figure 1.F the pinion will rotate in the counter clockwise direction and the actuator will go to it
open position. Althought the Milwaukee actuator typically operates counter clockwise to open and
clockwise to close, it is possible to reverse the operational mode. Figure 1.H & 1.I show the same double
acting actuator with the piston orientation changed to convert the actuator from close clockwise to close
counter clockwise ( as discribed in Section 10-1 CCCW conversion).
3
4-1 ACTUATOR INSALLATION
The Milwaukee actuator is designed to be easly installed. The actuator comes with an ISO bottom
mounting pattern and star broached on the pinion allowing for simpler coupling fabrication. Additional valve
mounting patterns are available upon request.
MOUNTING DIMENSIONS
Table 1
ISO dimensions represents
actuator mounting bolt circle.
ISO DIMENSION A
B Bolt Size
ISO DIMENSION C
D Bolt Size
Model
MC1
MC2
MC3
MC5
MC7
MC10
MC14
MC22
MC29
MC47
MC58
MC90
MC121
MC236
MC295
MC372
A Bolt Circle
1.65
1.97
2.76
2.76
2.76
2.76
4.02
4.02
4.02
4.92
4.92
6.50
5.51
6.50
6.50
6.50
B Bolt Size
10-32
1/4-20
5/16-18
5/16-18
5/16-18
5/16-18
3/8-16
3/8-16
3/8-16
1/2-13
1/2-13
3/4-10
5/8-11
3/4-10
3/4-10
3/4-10
C Bolt Circle D Bolt Size
1.42
1.42
1.97
1.97
1.97
1.97
2.76
2.76
2.76
4.02
4.02
4.92
-
10-32
10-32
1/4-20
1/4-20
1/4-20
1/4-20
5/16-18
5/16-18
5/16-18
3/8-16
3/8-16
1/2-13
-
Figure 2
Bottom view of the
UniTorq actuator with
ISO dimensions.
1.
2.
3.
4.
Table 2
Insert coupling into the actuator and the valve stem to check
for proper fit. NOTE: IF ACTUATOR IS DOUBLE
Bolt Size
ACTING, CHECK TO SEE IF PINION IS IN ITS
10-32
REQUIRED POSITION.
1/4-20
Make sure valve is in the normal position before proceeding.
5/16-18
Figure 3 describes the correct normal pinion position for all
3/8-16
1/2-13
CCW and double acting Milwaukee actuators. (Note: the pinion
O
3/4-10
for CCCW actuators will be rotated by 90 )
5/8-11
Install mounting bracket on to valve and hand tighten all
fasteners. (Be sure not to fully torque bolts until entire assembly
is correctly aligned and installed.)
Place coupling on valve stem and position actuator over coupling and onto mounting bracket. Align
valve and actuator assembly so as to eliminate shear forces. Tighten all assembly fasteners to the
appropriate torque.
4
Limit Switch and
Positioner Namur
mounting pad
Figure 3
Figure 3 shows an actuator in the
normal position (CCW operation) with
the pinion flats perpendicular to the
centerline of the actuator.
5.
Actuate pneumatically several times to ensure that the coupling is not binding. If unit does not
function properly, disassemble and repeat steps 1-5, as detailed in section 5-1. If problems persist,
contact your local Milwaukee representative.
6.
After all mounting procedures are completed, it is necessary to set the travel stops to ensure proper
rotation. The Milwaukee travel stop allows for a range of 95O to 85O. If a larger range is necessary,
consult section 12-1 for information on extended travel limit stops. NOTE: IMPROPER SETTING
OF TRAVEL STOPS CAN REDUCE ACTUATOR'S LIFE.
7.
Rotate valve assembly to desired position. (It is best to consult valve I & M sheet to determine the
correct set point for the valve.)
8.
Loosen both sealing nuts. Torque travel stops until the stops contact the pistons. Be sure not to alter
the valve position while setting the travel stops. Torque the sealing nuts until secure. Retest actuator to
assure that there are no end cap air leaks.
5-1
1.
DISASSEMBLY PROCEDURE
Disconnect all electrical and air supplies from the actuator.
CAUTION:
NEVER DISASSEMBLE AN ACTUATOR THAT IS UNDER PRESSURE
2.
Remove actuator from mounting bracket and coupling (limit switches and positioners when applicable)
and place in clean environment.
3.
Match the actuator and end caps, allowing for the correct reassembly of the actuator.
NOTE: IF THE END CAPS ARE NOT REPLACED WITH THE CORRECT
ORIENTATION, THE ACTUATOR WILL NOT FUNCTION PROPERLY. END
CAPS MUST BE REINSTALLED WITH "UP" SIDE ON TOP.
4.
Remove the eight socket head cap screws and remove end caps.
5
5.
Remove O-Rings from end cap. (Note: if actuator has not been in service, it will be necessary
to replace the O-Ring set.)
6.
Rotate pinion in Counter Clockwise direction (Note: if
unit is a CCCW, rotation will be in opposite direction)
until pistons are far enough from cylinder to be removed
by hand. If pistons are too difficult to remove by hand,
it is acceptable to use a pair of pliers to assist in their
removal. (Note: be sure not to scar the surface of pistons.)
Remove both pistons, noting the orientation of the pistons,
so that during reassembly the pistons will be replaced in the
same orientation. (Figure 4.)
7.
Figure 4
This figure shows the actuator pinion
rotated until pistons disengage
from pinion gears.
Remove snap ring and delrin washer from top of pinion.
Place the actuator between two blocks of wood so that the
pinion is free to be removed through the bottom of the
actuator body. Using a rubber mallet, lightly tap the top of
the pinion. When the pinion is loose from the body remove
the pinion through the bottom (Figure 5).
Figure 5
This figure demonstrates the
removal of pinion through the
bottom of the actuator.
8.
If Actuator has been in service the following components should be replaced. The O-Rings and guide
kits contains the following items: (Note: a repair kit contains both the O-Ring set and the guide set.)
Item #
1
2
3
4
5
6
7
Qty
2
2
1
1
1
1
2
Description
O-Ring (Piston)
O-Ring (End Cap)
O-Ring (Shaft Upper)
O-Ring (Shaft Lower)
Snap Ring
Pinion Washer
Air Passage O-Ring *
Item # Qty
1
1
2
1
3
2
4
2
Description
Shaft (Upper Guide)
Shaft (Lower Guide)
Piston Guide Skate
Piston Guide Ring
Table 3. B
Guide Set (Required Parts)
Table 3. A
O-Rings Set (Required Parts)
* = MC372 Only
6
5-2 LOW TEMPERATURE O-RING INSTALLATION
1.
Disassemble actuator as described in section 5-1.
2.
Using a flat head screwdriver, remove the O-Rings from the various actuator components:
(See section 16-1 for actuator parts list.)
a. Piston O-Rings (2 places)
b. End Caps (2 places)
c. Upper Pinion O-Ring (1 place)
d. Lower Pinion O-Ring (1 place)
e. Air Passage O-Ring (2 places)
3.
Using mineral spirits (or other mild solvent), remove the lubrication from each actuator component.
(Note: clean all surfaces thoroughly prior to installation of new O-Ring set.)
4.
Separate O-Rings and determine the locations for installation:
a. Piston O-Rings: will be the thickest O-Rings (2 pieces), (See Note.)
b. End Cap O-Rings: will have the largest O-Ring diameter (2 pieces), (See Note.)
c. Pinion O-Rings: of the 4 remaining O-Rings, the largest is installed in the lower pinion
O-Ring groove. The second largest is installed in the upper pinion O-Ring groove.
d. Air passage seals: the last 2 O-Rings are installed between the end cap and the actuators
internal air passage.
(Note: if these O-Rings are not properly seated, they may be pinched during reassembly and
subsequently leak.)
5.
Install low temperature O-Ring set. If the O-Rings are difficult to install, the O-Rings may be slightly
stretched and lubricated to ease installation. (Note: be sure to use the lubricant provided when
lubricating the O-Rings.) When installing the end cap O-Rings, be sure to seat the O-Ring properly.
6.
Apply lubricant to the internal portions of the actuator:
a. Inner bore of actuator.
b. Piston wear surfaces (piston skate, piston bearing & piston O-Ring).
c. Piston rack (apply on the full length of the piston rack).
d. Pinion gear teeth.
e. Pinion wear surfaces and O-Rings (both upper and lower areas).
7.
Assemble actuator as described 6-1.
7
6-1 REASSEMBLY PROCEDURE
1.
Inspect all wear surfaces for excessive wear or possible damage.
CAUTION:
BE SURE THAT ALL PARTS ARE STILL WITHIN FACTORY SET
TOLERANCES BEFORE REASSEMBLY
2.
Make sure all metallic parts are clean and free of any nicks or burrs.
3.
Install O-Rings (and wear surface skates and bearings when applicable) on pistons, end caps
and pinion.
4.
Lubricate the inside bore of the cylinder, O-Rings, piston skate, piston guides, pinion bearing
with compatible lubricant. In the case of a low temperature application (i.e. below
0o F), consult UniTorq for correct lubricant type. NOTE: ALL O-RINGS SHOULD BE
REPLACED AS A MATTER OF POLICY IF THE ACTUATOR HAS BEEN IN
SERVICE.
5.
Insert pinion into actuator body. Install pinion washer and snap ring.
6.
Insert pistons into cylinder body until the pistons begin to mesh with the pinion. Make sure that
the pistons are symmetrically placed inside the cylinder body. This is very important. Be sure that tooth
engagement is even on both pistons. If the pistons are not tracking properly remove and reinsert
pistons.
7.
Apply equal pressure on each piston until they are fully engaged with the pinion. Rotate pinion until
actuator is fully closed.
8.
Check the top of pinion for correct orientation. If the pinion flats are
perpendicular to the cylinder body then proceed to the next step.
(Note: For CCCW applications, the pinion flats should be parallel to
the cylinder body.) If the pinion is incorrectly positioned, as demonstrated
in figure 6, then proceed to part 8b.
Figure 6
Actuator with pinion flats
45 degrees of perpendicular
8b. Turn actuator up on its side. Rotate pinion counter clockwise until both pistons disengage
from pinion. Rotate pinion with a wrench to correct position. Apply light pressure to
pistons until pinion and pistons engage. Close actuator and check for correct pinion orientation.
(Repeat this step as many times as necessary to get the correct orientation.)
8
9.
Insert springs. (For information on the loading of springs refer to section 7-1.)
10.
Replace end caps, being sure to position them in same orientation as before.
NOTE: TORQUE SCREWS IN ALTERNATING ORDER TO ENSURE THAT THE
O-RING SEATS PROPERLY.
11.
End cap screws should be torqued, in alternating order, to the factory standard. Refer to Table 4
for correct bolt torque specifications.
MILWAUKEE
CONTROL MODEL
FASTNER FASTENER
UNC
METRIC
MC2-MC3
#10-32
M5
TORQUE
SPEC..
lbs-in/N-m
70/8
MC5-MC7-MC10
1/4-20
M6
106/12
MC14-MC22-MC29
5/16-18
M8
133/15
MC47-MC58
3/8-16
M 10
177/20
MC90-MC121
1/2-13
M 12
250/28
M 14
354/40
MC236-MC295-MC372
12.
9/16-12
Table 4
End cap fastener torque
specifications.
Pressurize Port B (Fig 1A-1D) on actuator body to test for air leaks. Leaks can occur around pinion
and between end cap and body mating surfaces. If an air leak is found near the end cap, remove end
cap and check for proper O-Ring seating. If O-Rings appear to be in good condition, repeat step 11.
9
7-1 SPRING INSTALLATION
Milwaukee actuators have the unique ability to be field converted from Double Acting to a Spring
Return actuator very easily by adding the spring configuration inside the end caps. (Note: refer to the
instructions below.) The Milwaukee actuator can accept up to 6 cartridge springs in each end cap, but not less
than 2 spring cartridges per end cap. The number of cartridge springs loaded into the actuator affects the
amount of torque the actuator will be able to generate during the closing and opening cycles. Review sections
11-X on actuator sizing for correct procedures in selecting spring combinations.
1.
Match mark cylinder body and end caps to ensure proper assembly. NOTE: COUNT OUT THE
CORRECT NUMBER OF SPRINGS TO BE USED BEFORE DISASSEMBLY IS
PERFORMED.
2.
Remove end caps. (Count out correct number of springs before attempting to convert unit.)
2
Total # of
Springs
3
1
Spring
Location
(Right cap)
Spring
Locations
(Left cap)
4
6
5
2
3
4
5
1/4
1/3/5
2/3/5/6 1/3/4/5/6
1/4
1/3/5
2/3/5/6
6
All
Positions
All
1/2/3/4/6 Positions
Table 5
Figure 7
Spring orientation chart
Right view of end cap
3.
Insert the correct number of springs in EACH end cap in the accordance with Table 5 and
Figure 7. (Example : Model # MC3 S4 = 4 springs/end cap. Total of 8 springs.)
4.
In the case of a S5 actuator be sure to offset the emply spring socket. Table 5 shows the
correct spring locations for the left and right end caps.
8-1 SOLENOID VALVE CHARACTERISTICS
Milwaukee direct mount Solenoid Valves are permenitly lubricated and are designed for long life.
These solenoid valves are specially designed to be easy installed on pneumatic actuators. The solenoids
come equipped with BUNA O-Rings to seal the valve ports to the actuator body.
Operation:
Dual Coil
Single Coil
10
Single Coil Solenoids:
Port 1 is the supply port and ports 3 and 5 are the exhaust ports for both the dual coil and single
coil types. The exhaust port may be equipped with silencers or speed controls to control the actuation
speed. Ports A and B are the actuator input ports. In the normal position air goes from the supply port
(port 1) to port B. During solenoid activation the flow will be from the supply port to port A.
PORT A
PORT B
FIGURE 8
Milwaukee
Solenoid Valve
1/2" NPT
EXHAUST
PORT 3
EXHAUST
PORT 5
SUPPLY PORT
(Port 1)
Dual Coil Solenoids:
Dual coil solenoids can be operated in two different modes.
Mode 1: Energize solenoid A to connect the Supply Port to Port A. The spool which directs the air
flow will respond in less than one second. After the spool has adopted its new position the coil can be deenergized. To direct the air flow to Port B engergize solenoid B which can also be de-engergized after the
spool has been moved.
Mode 2: All of the prevous conditions apply except that the coil moving the spool can be left
energized. The only important consideration is that YOU MUST DE-ENERGIZE COIL A BEFORE ENERGIZING
COIL B. The converse is also true. De-energize Coil B before energizing Coil A.
PORT A
PORT B
1/2" NPT
1/2" NPT
COIL B
COIL A
FIGURE 9
EXHAUST
PORT 3
SUPPLY PORT
(Port 1)
11
EXHAUST
PORT 5
Dual Coil
Solenoid Valve
8-2 SOLENOID VALVE INSTALLATION
Note: Make sure that Port O-Rings are correctly placed inside O-Ring groove.
1.
Affix solenoid to actuator and tighten screw to 70 in-lbs.
2.
Disconnect soleniod wire hood. Wire terminal block
and replace hood. (See Figure 10)
Note: Terminal designation
1. Positive
2. Neutral
3. Ground
3.
Energize solenoid valve serveral times and test for leaks and
proper operation. Note: Solenoid nut should be hand tight.
1
Positive
To Output Device
Ground
2
Neutral
FIGURE 10
Note: Wiring diagram is the same for all voltages.
(24/48/120/220 AC : 12/24/48/120 DC)
12
Manual Override:
The Milwaukee solenoid valve comes equipped with a manual override. A small red lever located
between the valve body and the coil positioned perpendicular to the long axis of the valve body allows for the
overriding of the solenoid if necessary. The normal position for the switch will be perpendicular to the long
axis of the valve body. A 900 rotation of the level in the counter clockwise direction will manually override the
solenoid in the disengaged posistion until the level is returned to its original position.
Solenoid Classification:
The Milwaukee solenoid valve is designed to the NEMA 4 and 4X standards. The UniTorq solenoid
valve can be adapted to the 7 and 9 classifications by installing a special solenoid on the standard valve body.
NEMA 4, 4X: Watertight and Dust tight - indoor & outdoor. Protects against windblown dust, rain, splashing
water and hose directed water and is corrosion resistant.
NEMA 7, 9: All of the above standard plus: Class I & Class II, indoor hazardous locations, explosion proof.
Which includes groups A, B, C, D, E, F, and G.
Specifications:
1. MCEV1 NAMUR 4 Way NEMA 4 solenoid valve with standard namur mount (MC1 - MC372)
Specifications:
Nominal Voltage: 110 VAC +/- 10%
Port Dimensions: Port 1 = 1/4" NPT (Ports 3 & 5 = 1/8")
Power: 60 Hz AC at 3.3 Watts
Pressure Range: Min - 29 psi. / Max - 145 psi.
CV Factor: 9
In addition to these two basic models UniTorq also offers a NEMA 4, 7, and 9 upgrade for explosion proof
applications. The UniTorq explosion proof solenoid can easily be mounted to the standard UniTorq valve block
with the addition of a spacer block and a valve adapter kit.
2. MCEV1-2 NAMUR 4 Way NEMA 4, 7, and 9 solenoid valve with Namur Mounting
Specifications:
Nominal voltage: 100VAC +/- 10%
Port Dimensions: 1,3,5 1/4" NPT (Ports 3 & 5 1/8" NPT)
Power: 60 Hz AC at 5.9 Watts
Pressure Range: Min - 29 psi. / Max - 145 psi.
CV Factor: 9
13
8-3
SOLENOID VALVE INSTALLATION - EXPLOSION PROOF
The Milwaukee solenoid valve can be converted to comply with the NEMA 7 & 9 standard by adding an
explosion proof coil.
Figure 11
Milwaukee Controls
Explosion proof
soleneoid valve
Exploded view
1.
Choose the appropriate sized direct mount solenoid valve: Remove lock nut to enable coil removal.
2.
Affix solenoid valve (with spacer block in place) to side of actuator. (Note: be sure that all 4 O-Rings
remain in the O-Ring grooves and are not pinched.)
3.
Tighten Coil adapter. (Note: coil adapter should be tight against adapter plate collar.) Replace coil and
lock nut. (Note: do not tighten lock nut until conduit assembly is complete.)
4.
Install Nema 7 rated conduit. See figure 12 for typical conduit installation.
5.
Prior to tightening lock nut, be sure the conduit assembly
is not exerting excessive load on the solenoid valve.
CAUTION:
THE SOLENOID VALVE SHOULD NOT BE
SUBJECTED TO A TORQUE GREATER THAN
800 IN-LBS BY THE CONDUIT ASSEMBLY.
14
Figure 12
Typical conduit assembly
Explosion Proof
9-1 SPEED CONTROL DEVICES
Milwaukee actuators are designed to enable the user to obtain the lowest possible cycle time. In some
instances, it is desirable to enable the actuator to cycle more slowly than the standard speed. In these cases a
speed control device is necessary. Milwaukee can provide speed controls to obtain varying cycle times.
1/8" NPT FOR MC2 - MC10
1/4" NPT FOR MC14 - MC295
Milwaukee Controls silence/speed control
When using speed controls, coat the speed control threads with pipe sealing compound prior to
installation to avoid air leakage. The cycle time can be changed by loosening the speed control nut and then
tightening or loosening the adjustment screw. To increase cycle time, tighten the adjustment screw. To
decrease the cycle time, loosen the adjustment screw. (Note: be sure to tighten the speed control nut prior to
commencing operation.)
10-1 CCW TO CCCW CONVERSION
Milwaukee actuators typically come from the factory as Closed Clock-wise (CCW) units. In the event
that the actuator needs to be changed from CCW to a Closed Counter Clock-wise (CCCW) actuator.
actuators can be easily field converted to this configuration.
1.
Remove end caps, pistons and the pinion as described in the disassembly procedure. Prior to
reassembly, rotate both pistons 180o along the long axis of the piston. (See Figure 14.)
Upon rotation of pistons, reassebly can be accomplished by following the reassembly
instruction in Section 6-1 Steps 1-12 of this manual.
Figure 14
14.a
14. b
Figure 14.a roates to position
14.b for conversion of actuator
from CCW to CCCW
NOTE: REPLACE SPRINGS PRIOR TO TESTING IF NECESSARY
15
2.
After this procedure has been accomplished, you should be able to put air into the right air
port and move the actuator counter clock-wise. When air is placed in the left port, the actuator
now rotates in the clockwise direction.
11-1 ACTUATOR SIZING
Prior to actual sizing; it is important to obtain certain information. Key numbers to obtain are as follows:
• Torque required to open the valve (Break Torque)
• Torque required to close: the valve (Seating Torque)
• Torque required to rotate the valve (Running Torque)
• Supply-air pressure (To Actuator)
• Differential Pressure of Valve/Damper
Obtaining the above information allows you to properly and effectively size the actuator. (Note: double
acting actuators have a constant torque throughout their stroke. When determining the air supply pressure, it
is important that you use the minimum air pressure that the actuator will experience and not the average air
supply pressure. If an actuator is supplied by a lower air pressure than it is sized for, failure or improper
performance will occur.)
UniTorq offers a Windows based sizing program for double acting and spring return actuators to make
sizing easier. Please refer to your local sales representive for more information or to obtain the latest
edition.
11-2 DOUBLE ACTING ACTUATORS
1.
Select the largest torque (opening or closing torque) and increase that number by 10%.
(Note: adding 10% will ensure an acceptable factor of safety. The data published in
the sizing table indicates the actuator's maximum capability for a given pressure.)
2.
Look in the column that corresponds to the supply pressure, you have selected. Move down
the chart until you have found a torque which is larger than the torque determined for your
application. After you have found the correct value move across the table horizontally to
determine the correct actuator.
11-3
1.
SPRING RETURN ACTUATORS
Multiply both your valve closing torque and your valve opening torque by 20%. (This
will provide an acceptable factor of safety.) NOTE: THE VALVE CLOSING TORQUE
CORRESPONDS TO THE SPRING END COLUMN AND THE VALVE OPENING
TORQUE CORRESPONDS TO THE ACTUATOR AIR PRESSURE COLUMN.
16
Example:
Given information-Valve opening torque (VOT) = 800 in-lbs.
Valve closing torque (VCT) =750 in-lbs.
1. Increase by 20% + VOT = 960in-lbs : 20% + VCT = 900in-lbs
2. Refer to table below:
Column 1
Column 2
Model Type Supply Pressure
Spring Stroke
80 Psi
Torque
Air Stroke Torque
Table 6
Sizing Sample
S3
1690 (in-lbs)
774 (in-lbs)
Chart
MC29
S4
1283
1033
S5
876
1290
NOTE: THIS TABLE IS AN EXCERPT FROM THE SIZING CHART
PROVIDED BY UNITORQ.
2.
To satisfy all conditions of this application we compare the VOT to the column 1 and the VCT to
column 2. Since the MC29 S4 satisfies both conditions, we select this actuator.
12-1 EXTENDED FINAL LIMIT STOPS
The Milwauke line of actuators also includes a special feature called the extended final limit stop.
This feature allows for the adjusting of the total amount of rotation of an actuator. To install this feature,
perform the following steps: (Note: be sure to follow the disconnection procedure outlined in section 5-1.)
1.
Remove the sealing nut and end stop from both end caps. Sealing nuts have a small groove
cut into the bottom to allow for the sealing O-Ring to be seated. Be sure to replace the
O-Ring when replacing the sealing nut.
2.
After disassembly, install the extended limit stops in the manner described in the installation
section 4-1, parts 6 through 8. (Note: this information refers to the travel stops, but in
this configuration the travel stops and the extended limit stops act in the same manner.)
17
13-1
DOUBLE LIMIT STOPS
The new DLS configuration allows for quicker and safer stroke travel adjustment with no increase in external
dimensions or additional caps. Adjustments are easier than ever before with improved strength and
performance.
The new DLS actuator allows for approximately 5 degrees of stroke over-travel in each direction. The
effective operation of the actuator is now -50 to 950, with adjustment of over 100 at either end of travel. This
will allow the user to fine tune the actuator for optimal valve performance and life.
The travel stops are located at the end caps. Facing the actuator with the air ports nearest to you the open
(piston in) travel stop is located on the left. The closed (piston out) travel stop is on the right end cap. It is the
gold zinc plated nut. To adjust the open position simply back off the lock nut and turn the setscrew in
clockwise (CW) to reduce travel or out counter clockwise (CCW) to inverse travel. To set the close stop,
loosen the locknut on the right side travel stop and screw it set screw inwards, clockwise (CW), to increase
travel or outwards, counter clockwise (CCW), to decrease the travel.
ACTUATOR SHOWN IN OPEN POSITION
ACTUATOR SHOWN IN CLOSED POSITION
ADJUSTMENT FOR OPEN
STROKE. SCREW CCW TO
INCREASE TRAVEL
ADJUSTMENT FOR CLOSE
STROKE. SCREW CW TO
INCREASE TRAVEL
AIR PORTS
18
14-1
ACTUATOR DIMENSIONS
PROPRIETARY MOUNTING
MC2 - MC10
OUTPUT SHAFT
OUTPUT SHAFT
MODEL A
MC1 1.65
MC2 1.97
MC3 2.76
MC5 2.76
MC7 2.76
MC10 2.76
MC14 4.02
MC22 4.02
MC29 4.02
MC47 4.92
MC58 4.92
MC90 6.50
MC121 5.51
MC236 6.50
MC295 6.50
MC372 6.50
FO B
FO
FO4 1.42
FO5 1.42
FO7 1.97
FO7 1.97
FO7 1.97
FO7 1.97
F10 2.76
F10 2.76
F10 2.76
F12 4.02
F12 4.02
F16 4.92
F14 F16 F16 F16 -
FO3
FO3
FO5
FO5
FO5
FO5
FO7
FO7
FO7
F10
F10
F12
-
C*
#10-32
1/4-20
5/16-18
5/16-18
5/16-18
5/16-18
3/8-16
3/8-16
3/8-16
1/2-13
1/2-13
3/4-10
5/8-11
3/4-10
3/4-10
3/4-10
D*
E
#10-32 9 OR 11MM
#10-32
14MM
1/4-20
14MM
1/4-20
17MM
1/4-20
17MM
1/4-20
17MM
5/16-18
22MM
5/16-18
22MM
5/16-18
22MM
3/8-16
27MM
3/8-16
27MM
1/2-13
36MM
36MM
46MM
46MM
46MM
F
G
H
I
0.55 2.02 2.54 0.35
0.71 1.97 2.32 0.39
0.71 2.36 2.76 0.39
0.75 2.56 3.27 0.39
0.75 2.56 3.58 0.39
0.75 2.76 3.94 0.55
0.96 3.54 4.72 0.55
0.96 3.54 4.72 0.79
0.98 4.06 5.39 0.79
1.07 4.33 6.77 0.79
1.07 4.33 6.77 1.10
1.57 5.31 8.82 1.26
1.57 5.31 8.82 1.26
1.57 6.26 10.71 1.26
1.53 6.26 10.71 1.26
1.61 6.30 14.17 1.26
19
L
L1*
M
4.33
0.48
5.00 7.52 0.47
5.24 7.99 4.47
6.10 9.29 0.55
6.97 10.63 0.55
7.99 12.36 0.79
8.50 12.72 0.79
11.18 16.85 1.10
11.42 17.76 1.10
13.27 1.10
14.49 22.36 1.42
16.62 1.42
17.72 27.24 1.57
23.07 35.63 1.57
23.07 1.57
26.89 1.58
N
P
Q
R
S
0.79
0.79
1.02
1.02
1.38
1.97
1.97
1.97
2.36
2.36
2.84
2.95
3.54
3.54
2.96
2.60
2.91
3.46
3.94
4.25
4.61
5.51
5.51
6.30
7.80
7.80
10.00
10.00
11.89
11.89
14.17
3.50
3.82
4.37
4.84
4.95
5.55
6.45
6.71
7.51
9.70
9.70
11.77
11.77
13.66
13.66
15.94
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/2
0.94
0.94
0.94
0.94
0.94
0.94
0.94
0.94
0.94
0.94
0.94
0.94
0.94
0.94
0.94
1.97
15-1 MILWAUKEE CONTROLS TECHNICAL INFORMATION
MODEL
90o
MC1
MC2
MC3
MC5
MC7
MC10
MC14
MC22
MC29
MC47
MC58
MC90
MC121
MC236
MC295
MC372
1.00
1.98
2.98
4.30
5.51
7.39
10.58
14.99
18.74
31.00
34.40
61.50
68.80
132.32
160.97
205.00
120o
2.20
3.26
4.74
5.95
8.16
11.47
16.90
20.73
39.69
81.14
146.63
177.60
-
180o
2.65
3.97
5.95
7.94
11.25
13.56
20.68
26.02
55.79
106.94
173.60
-
K6
1.20
2.20
3.42
5.07
6.39
8.38
12.79
17.86
22.49
39.80
42.78
83.10
86.66
180.81
209.48
267.00
ACTUATOR WEIGHT
IN POUNDS
MODEL
AIR CONSUMPTION
CUBIC INCHES PER CYCLE
TYPE
CYCLE TIME (Sec.)
MC1
MC2
MC3
MC5
MC7
MC10
MC14
MC22
MC29
MC47
MC58
MC90
MC121
MC236
MC295
MC372
0.123
0.158
0.214
0.333
0.429
0.444
0.461
0.600
0.857
1.280
1.620
2.790
3.330
6.000
7.500
9.600
MC1
MC2
MC3
MC5
MC7
MC10
MC14
MC22
MC29
MC47
MC58
MC90
MC121
MC236
MC295
MC372
90o
12.8
15.3
22.0
36.6
52.5
67.1
112.9
152.6
218.5
335.6
416.2
762.6
872.6
1586.6
1922.2
2955.0
120o
17.1
24.4
42.7
61.0
82.4
137.3
176.9
241.0
476.0
1013.0
1861.2
2288.4
-
180o
28.1
41.5
68.3
99.5
131.2
189.2
341.7
415.0
790.2
1293.7
2471.5
-
K6
6.7
7.3
9.2
15.3
22.0
27.5
41.5
67.1
86.7
174.5
174.5
396.7
360.0
701.8
1037.4
1594.0
ACTUATOR CYCLE TIME
90O Actuation
NOTE: STROKE TIME IS EQUAL FOR OPENING AND
CLSOING STROKES.
20
16-1 MILWAUKEE CONTROLS ACTUATOR MATERIAL TABLE
Item #
Qty
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
1
1
2
2
1
1
1
1
1
Max 12
1
1
1
1
1
1
1
2
2
2
1
8
2
Description
Body
Piston STD
Piston DLS
Piston O-Ring
Piston Guide
Piston Skate
DLS
DLS O-Ring
DLS Bearing
DLS Snap Ring
Spring Cartridge
Snap Ring
Pinion Washer
Upper Pinion O-Ring
Upper Pinion Bearing
Pinion
Lower Pinion Bearing
Lower Pinion O-Ring
End Cap
Sealing Nuts
Seal Nut O-Ring
Open Travel Stop
End Cap Fastners
End Cap O-Ring
21
Material
Anodized Aluminum
Die Cast Aluminum
Die Cast Aluminum
Buna N
Delrin 500
Delrin 500
ANSI 304 Stainless Steel
Buna N
Delrin 500
ANSI 304 Stainless Steel
Epoxy Coated Steel
E.N.P. ASTM B656 Stell
Delrin 500
Buna N
Delrin 500
E.N.P. ASTM B656 Steel
Delrin 500
Buna N
Epoxy Coated Aluminum *
ANSI 304 Stainless Stell
Buna N
ANSI 304 Stainless Steel
ANSI 304 Stainless Steel
Buna N
WAR RAN TY
THE SELLER WARRANTS IT'S PRODUCTS AGAINST DEFECTS IN
MATERIAL OR WORKMANSHIP, WHEN USED ON THOSE SERVICES
APPROVED BY THE SELLER, FOR A PERIOD OF TWO YEARS FROM THE DATE
OF ORIGINAL SHIPMENT. THE SELLER'S LIABILITY UNDER THIS WARRANTY
SHALL BE LIMITED TO REPAIR OR REPLACEMENT AT SELLER'S OPTION OF
SUCH PRODUCTS. F.O.B. FACTORY, UPON PROOF OF DEFECT SATISFACTORY
TO SELLER. SELLER MAKES NO WARRANTIES, EITHER EXPRESSED OR
IMPLIED, EXCEPT AS PROVIDED HEREIN, INCLUDING WITHOUT
LIMITATION THEREOF, WARRANTIES AS TO MARKETABILITY,
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR USE, OR
AGAINST INFRINGEMENT OF ANY PATENT. IN NO EVENT SHALL SELLER BE
LIABLE FOR ANY DIRECT, INCIDENTAL OR CONSEQUENTIL DAMAGES OF
ANY NAUTRE, OR LOSES OR EXPENSES RESULTING FROM ANY DEFECIVE
PRODUCTS OR THE USE OF ANY PRODUCT.
22
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