Emerson Bettis RPE Series User manual

Installation, Operation and Maintenance Manual
DOC.IOM.BE.EN Rev. 12
October 2021
Bettis RPE-Series
Rack and Pinion Pneumatic Actuators

Notes
October 2021
Installation, Operation and Maintenance Manual
DOC.IOM.BE.EN Rev. 12
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Installation, Operation and Maintenance Manual
DOC.IOM.BE.EN Rev. 12
Table of Contents
October 2021
Table of Contents
Table of Contents
Section 1: Before You Start
1.1 Installation, Operation and Maintenance Reference Documents.................... 1
1.2 Warehouse Storage....................................................................................... 2
1.3 On-Site Storage............................................................................................. 2
Section 2: Introduction
2.1 Identication................................................................................................. 3
2.2 Intended Use................................................................................................. 5
2.3 Specications................................................................................................ 5
Section 3: Conguration Code
Conguration Code....................................................................................... 7
Section 4: Installation
4.1 Before You Start ............................................................................................ 9
4.2 Actuator Rotation Direction .......................................................................... 9
4.2.1 Valve Rotation .................................................................................... 9
4.2.2 Position After Failure ........................................................................ 10
4.3 Principles of Operation................................................................................ 10
4.3.1 Solenoid Valve.................................................................................. 10
4.3.2 Ingress Protection (IP) rating ............................................................ 11
4.3.3 Double-Acting Actuators.................................................................. 12
4.3.4 Spring-Return Actuators................................................................... 13
4.4 Actuator Assembly Codes ........................................................................... 14
4.5 Actuator to Valve Installation ...................................................................... 15
4.6 Mounting of control and feedback accessories............................................ 18
4.7 Recommended Tubing Sizes........................................................................ 18
Section 5: Mechanical Stroke Adjustment
5.1 Travel Stop Adjustment ............................................................................... 20
5.1.1 Double-Acting Actuators.................................................................. 20
5.1.2 Spring-Return Actuators................................................................... 20
5.1.3 Angular Displacement ...................................................................... 21
Section 6: Maintenance
6.1 Normal Maintenance................................................................................... 22
6.2 Inspection and Repair.................................................................................. 23
6.2.1 Service Kits....................................................................................... 23
6.2.2 Spring-Return Actuator .................................................................... 23
Section 7: Decommission (Out of Service)
7.1 Before You Start .......................................................................................... 24
7.2 Removing the Actuator from the Valve........................................................ 25

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Table of Contents
October 2021
Installation, Operation and Maintenance Manual
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Table of Contents
Section 8: Disassembly
8.1 Removing End Caps (Sizes 25 to 600) .......................................................... 27
8.2 Removing End Caps (Sizes 950 to 4000)...................................................... 29
8.3 Removing Spring Cartridges or Springs ....................................................... 30
8.4 Removing of Limit Stop ............................................................................... 31
8.5 Removing Pistons........................................................................................ 31
8.6 Removing Pinion ......................................................................................... 32
8.7 Cleaning the Components........................................................................... 33
Section 9: Reassembly
9.1 Grease Instructions ..................................................................................... 35
9.2 Reassembly of the Pinion............................................................................. 36
9.3 Reassembly of the Pistons ........................................................................... 37
9.4 Reassembly and Settings of the Limit Stops................................................. 39
9.5 Reassembly of the End Caps ........................................................................ 40
9.5.1 Double-Acting Actuators.................................................................. 40
9.5.2 Spring-Return Actuators................................................................... 41
9.5.3 Spring-Return Actuators - Size 950 to 4000 ...................................... 43
9.6 Basic Function and Air Leak Test .................................................................. 45
Section 10: Troubleshooting
10.1 Mechanical Problems .................................................................................. 46
10.2 Pneumatic Problems ................................................................................... 47
10.3 Electrical Problems...................................................................................... 48
Section 11: Parts List and Spare Parts Recommendations
11.1 Actuator Sizes RPE25 to RPE600.................................................................. 49
11.2 Actuator Sizes RPE950 to RPE2500.............................................................. 50
11.3 Actuator Size RPE4000................................................................................ 51
Appendix A: Spring Load Removal
A.1 Spring Load Relief........................................................................................ 52
Appendix B: Tool and Torque Table
Tool and Torque Table ........................................................................................... 55
Appendix C: Full Stroke Adjustment Option
C.1 Full Stroke Adjustment Option .................................................................... 56
C.2 Convert a Standard Actuator into a Full Stroke Adjustment Version ............. 57
C.2.1 Procedure ........................................................................................ 58
C.3 Full Stroke Adjustment Setting.................................................................... 59
C.3.1 Factory Setting Procedure ................................................................ 59
C.3.2 Setting the Full Stroke Adjustment Screw to the Required Angle....... 60

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Installation, Operation and Maintenance Manual
DOC.IOM.BE.EN Rev. 12 October 2021
Before You Start
Section 1: Before You Start
Section 1: Before You Start
This section explains:
• Base safety procedures
• Where to nd detailed information relating safety
• Storage guidelines
Installation, adjustment, putting into service, use, assembly, disassembly and maintenance
of the pneumatic actuator must be performed by qualied personnel.
NOTICE
Failure to follow the above guidelines will void warranty.
!WARNING
Actuator must be isolated both pneumatically and electrically before any (dis)assembly
starts. Before mounting or (dis)assembly of the actuator, consult the relevant sections of
this manual.
1.1 Installation, Operation and Maintenance
Reference Documents
Before you start, read the following documents:
• All chapters in this manual
• Safety Guide (Document No. DOC.SG.BE.1)
For Safety Instrumented Systems application, read the following document:
• SIL Safety Manual Bettis RPE-Series (Document No. DOC.SILM.BE.EN)
NOTICE
Failure to read the Safety Guide will void the warranty.
Not following the instructions of the Safety Guide can lead to failure of the product and
harm to personnel or equipment.

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Installation, Operation and Maintenance Manual
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Before You Start
Section 1: Before You Start
1.2 Warehouse Storage
• All actuators should be stored in a clean, dry warehouse, free from excessive
vibration and rapid temperature changes.
• All actuators should not be stored directly to the oor surface - it must be placed
in racks/shelves or use a pallet.
1.3 On-Site Storage
• All actuators should be stored in a clean, dry warehouse, free from excessive
vibration and rapid temperature changes.
• Prevent moisture or dirt from entering the actuator. Plug or seal both air
connection ports.
NOTICE
Failure to follow the above guidelines (Warehouse and On Site Storages) will void warranty.

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Introduction
Section 2: Introduction
Section 2: Introduction
This section explains:
• How to identify the received product
• The intended use of the product
• Construction details
• Actuator specications
2.1 Identication
The Bettis™ RPE-Series Rack and Pinion actuators are available as double-acting or
spring-return versions. 12 models are available, ranging from 23 Nm to 4041 Nm
(206 to 35765 lbf-in)nominal torque output.
The Bettis RPE-Series uses standardized interfaces for solenoid, switchbox or positioner
mounting (VDI/VDE3845; NAMUR). The valve interface is equipped with an insert in the
pinion bottom that allows both ISO5211 or DIN3337 mounting.
The springs in the spring-return version allow a fail action in case of loss of air supply
pressure (Fail-to-Close or Fail-to-Open).
As from size RPED150 double-acting versions have at end caps to reduce actuator length
and internal air volume.

4
25 -
100
150 -
600
4000
950 -
2500
SR DA
SR DA
SR DA
SR DA
1
2
3 4
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Introduction
Section 2: Introduction
Figure 1 Identication
Size End cap design5Spring design6Pinion bottom/insert design2
Left Right
Left Right
Left Right
Left Right
Maximum 12
spring cartridges
Maximum 12
spring cartridges
Maximum 6
loose springs
Maximum 6
loose springs
Notes
1. Top auxilliaries and Solenoid interface (VDI/VDE 3845; NAMUR) for size 25 to 4000.
2. Valve interface availalable according ISO5211 or DIN 3337.
Actuator sizes 25 to 2500 can be tted with drive inserts with various inner shapes.
Actuator size 4000 is tted with a double square; parallel and diagonal.
3. Spring-Return actuators: - with springs.
4. Double-Acting actuators: - no springs.
5. Actuator sizes 25 to 100 have high end caps for double-acting and spring-return models.
Actuator sizes 150 to 4000 have low end caps for double-acting models and high end caps for
spring-return models.
6. Actuator sizes 25 to 600 are tted with a maximum of 12 spring cartridges.
Actuator sizes 950 to 4000 are tted with a maximum of of 6 loose springs.

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Installation, Operation and Maintenance Manual
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Introduction
Section 2: Introduction
2.2 Intended Use
The Bettis RPE Rack and Pinion actuators are intended for the automation and operation of
quarter-turn valves like Buttery, Ball and Plug valves.
Rack and Pinion actuators can also be used to operate dampers or any other quarter-turn
applications.
2.3 Specications
Table 1. Pressure Range
Table 2. Operating Media
1. Recommended air quality according ISO 8573-1 for normal operation: 7-5-4.
NOTE:
Use of lters, pressure regulators, lubricator and an oil/water separator mounted in the air
supply line, will allow a smooth and durable operation of the actuator.
For lubricated supply air, it is recommended to use a non-detergent oil without aggressive
additives, VG32, group 2 (ISO 3448).
Table 3. Temperature Range
Actuator Type Pressure
Double-Acting 0.2 to 8 bar (2.9 to 116 psi)
Spring-Return 6 to 8 bar (87 to 116 psig), with maximum spring set
3 to 8 bar (43.5 to 116 psig), reduced spring quantity
Actuator Type Operating Media
Double-Acting and Single Acting
Air, dry or lubricated and inert gases
Dew point at least 10K below ambient temperature
For sub-zero applications, take appropriate measures
Mentioned pressure levels are "gauge pressures". Gauge pressure
is equal to absolute pressure minus atmospheric pressure.
Actuator Type Temperature
Standard -20 °C to 80 °C (-4 °F to +176 °F)
Option: Low Temperature -40 °C to +80 °C (-40 °F to +176 °F)
Option: High Temperature -10 °C to +120 °C (+14 °F to +250 °F)

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Introduction
Section 2: Introduction
Table 4. Air Volumes and Consumption
Central air chamber volume
Double-Acting and Spring-Return
End cap air chamber volume
Double-Acting only
Actuator volumes
Actuator
model
Max. volume (in Liters)
Central1
chamber
End cap2
chamber
Displaced3
volume
RPE 0025 0.14 0.20 0.08
RPE 0040 0.26 0.37 0.15
RPE 0065 0.40 0.56 0.22
RPE 0100 0.6 0.9 0.3
RPE 0150 1.0 0.8 0.5
RPE 0200 1.3 1.0 0.7
RPE 0350 2.1 1.9 1.2
RPE 0600 3.6 3.3 2.1
RPE 0950 4.9 4.6 3.2
RPE 1600 7.9 7.3 5.4
RPE 2500 12.6 11.9 8.3
RPE 4000 21.7 19.0 13.5
Consumption per stroke
(nL/stroke, pressure in barg)
Outward Stroke Inward Stroke
Double-Acting
and Spring-Return Double-Acting only
248248
0.42 0.69 1.25 0.59 0.99 1.78
0.77 1.29 2.31 1.10 1.83 3.29
1.2 2.0 3.6 1.7 2.7 4.9
1.8 3.0 5.3 2.7 4.5 8.0
3.0 4.9 8.9 2.4 4.0 7.1
3.9 6.4 11.6 3.0 4.9 8.9
6.2 10.4 18.7 5.7 9.4 17
11 18 32 9.8 16 29
15 24 44 14 23 41
23 39 70 22 36 65
37 62 112 35 59 106
65 107 193 57 94 169
Actuator volumes:
Actuator
model
Maximum volume
(cu in.)
Central1
chamber
End cap2
chamber
Displaced3
volume
RPE 0025 8.5 12.2 4.7
RPE 0040 15.9 23 8.9
RPE 0065 24 34 13.5
RPE 0100 36 53 19.9
RPE 0150 58 47 32
RPE 0200 76 64 44
RPE 0350 131 115 76
RPE 0600 222 201 129
RPE 0950 301 279 196
RPE 1600 484 447 328
RPE 2500 769 728 508
RPE 4000 1324 1159 825
Consumption per stroke
(Standard cu.in./stroke, pressure in psig)
Outward Stroke Inward Stroke
Double-Acting
and Spring-Return Double-Acting only
40 80 120 40 80 120
32 55 78 45 79 112
59 102 146 86 148 211
89 155 220 127 219 312
134 232 330 197 342 486
216 374 532 175 303 431
283 490 697 238 412 587
488 844 1201 428 741 1054
826 1431 2035 748 1295 1842
1120 1940 2759 1038 1798 2557
1801 3119 4436 1664 2880 4097
2862 4955 7048 2710 4691 6673
4928 8531 12135 4314 7468 10623
Notes:
1. Pistons at 90° outward position.
2. Pistons at 0° inward position.
3. Stroke is 90°.
Figure 2 Actuator air volumes

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Installation, Operation and Maintenance Manual
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Conguration Code
Section 3: Conguration Code
Section 3: Conguration Code
This section explains:
• How to create the conguration code for a actuator.
Type
RPED Double-Acting
RPES Spring-Return
Size
0025 Size 0025 0350 Size 0350
0040 Size 0040 0600 Size 0600
0065 Size 0065 0950 Size 0950
0100 Size 0100 1600 Size 1600
0150 Size 0150 2500 Size 2500
0200 Size 0200 4000 Size 4000
Rotation Angle
N90° rotation angle
Threads
MMetric ISO 5211
UUNC/NPT/Imperial
Spring Set
00 Double-Acting (no springs)
10 Spring Set 10 40 Spring Set 40
20 Spring Set 20 50 Spring Set 50
30 Spring Set 30 60 Spring Set 60
Rotation Direction
CW Spring to Close/Clock Wise
CC Spring to Open/Counter Clock Wise
Pinion Material
AL High Grade Aluminium, Hard anodized (7
SS Stainless steel ASI 316 (+ A4-70 SS fasteners)
Valve Interface(2
TN Standard ISO 5211 interface
SY Small interface with center plate (DIN3337)
LY Large interface with center plate (DIN3337)
Valve Stem Connection
Actuator
size Square
Aluminum Stainless Steel (4
Parallel
drive 
Diagonal
drive Star drive 
No insert 000 Not applicable
0025 11 mm / 0.433" L11 D11 Q11
0040 &
0065 14 mm / 0.551" L14 D14 Q14
0100 17 mm / 0.669" D17 Q19
19 mm / 0.748" L19
0150 17 mm / 0.669" D17 Q22
19 mm / 0.748" L19
0200 22 mm / 0.866" L22 D22 Q22
0350 22 mm / 0.866" D22 Q27
27 mm / 1.063" L27
0600 27 mm / 1.063" L27 D27 Q27
0950 36 mm / 1.417" L36 D36 Q36
1600 &
2500 46 mm / 1.811" L46 D46 Q46
4000 (3 55 mm / 2.165" Q55 Q55 Q55
Temperature Range
SStandard: -20 °C to +80 °C (-4 °F to +176 °F)
HHigh: -10 °C to +120 °C (+14 °F to +250 °F)
LLow: -40 °C to +80 °C (-40 °F to +176 °F)
Visual Indication Code
KStandard (Knob)
NNo Visual Indication
Finish
BStandard coating (Bettis Orange)
Internal code 1
00 Standard
10 Stainless steel AISI316 (A4-70) end cap screws (7
Miceleanuous options
XX Standard
H1 1/2" High Flow plate
P1 1/2" Porting according EN 15714-3 (only sizes 950-4000)
Notes:
See next page.
RPES 0150 - N U 40 CW AL TN - L19 S K A - 00 XX
Type
Size
Rotation angle
Threads
Spring set
Rotation
Pinion material
Valve interface
Miscellaneous options
Internal code 1
Color / nish
Visual indicator
Temperature
Valve stem connection

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Conguration Code
Section 3: Conguration Code
Notes:
1. The options, listed here, are all options available. Not all options apply to
all congurations.
2. Valve Interface: Option "S"; Small Interface with Center Plate (DIN3337) is not
available for size 0025, 0950 and 4000. Option "L"; Large Interface with Center
Plate (DIN3337) is not available for size 1600 and 2500.
3. Size 4000 does not have inserts but has two inner squares
(diagonally and parallel oriented) directly in the bottom of the pinion.
4. Actuators with stainless steel pinions do not have inserts but have two inner
squares (diagonally and parallel oriented aka "Star Drive") directly in the bottom of
the pinion.
5. Contact you local Bettis representative for additional insert options.
6. PED Group 1 Label only available up to size 950.
7. Actuators with the default hard anodized pinions, come with stainless steel grade
A2 (AISI304) end cap screws.
Optional, the actuator is available with stainless steel grade A4-70 (AISI316)
end cap screws.
Select option 10 in the "Internal code 1" segment in case stainless steel grade A4
(AISI316) end cap screws are required.

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Installation, Operation and Maintenance Manual
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Installation
Section 4: Installation
Section 4: Installation
This section explains:
• The actuator rotation direction
• In which position the actuator will end after a failure
• Principles of operation:
— Solenoid operation
— Double-acting and Spring-return operation
• Assembly codes
• Actuator to valve assembly
4.1 Before You Start
SAFETY
In case of an air or electrical failure, it is important to know the behavior of the actuator.
Before mounting the actuator on a valve, consult the following sections below.
4.2 Actuator Rotation Direction
4.2.1 Valve Rotation
For the following paragraphs we assume that valves rotate as indicated in Figure 3.
Figure 3 Normal valve rotation
The valve is closed after
a clockwise rotation.
The valve is open after
a counterclockwise rotation.

10
ABA
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Installation
Section 4: Installation
4.2.2 Position After Failure
The position of the actuator after a failure depends on the:
1. Principle of operation (see Section 4.3)
2. Assembly codes (see Section 4.4)
3. Kind of failure. Refer to Table 5.
Table 5. Position After Failure
Spring-Return Operation Double-Acting Operation
CW
CW
Principle of
Operation Assembly Code Kind of Failure Position
Double-Acting
Actuator
Pressure Not dened
Signal Closed
Supply Voltage Closed
Pressure Not dened
Signal Open
Supply Voltage Open
Single-Acting
(Spring-Return)
Actuator
Pressure Closed
Signal Closed
Supply Voltage Closed
Pressure Open
Signal Open
Supply Voltage Open
4.3 Principles of Operation
4.3.1 Solenoid Valve
All actuators can be either piped with solid or exible tubing with the solenoid valve
mounted remotely from the actuator or by mounting a VDI/VDE 3845 (NAMUR) designed
solenoid valve DIRECTLY onto the NAMUR mounting pad on the side of the actuator.
Figure 4 Typical solenoid operation

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Installation, Operation and Maintenance Manual
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Installation
Section 4: Installation
Table 6 represents the cycle time (operating time) per different Actuator sizes:
Table 6. Operating Speed
Operating time is average with actuator under load and solenoid valve tted.
Test conditions:
1. Solenoid with ow capacity: 0.6 m3/hr
2. Pipe diameter: 6 mm
3. Medium: clean air
4. Supply pressure: 5.5 bar (80 psi)
5. Load: with average load
6. Stroke: 90°
7. Temperature: Room temperature
4.3.2 Ingress Protection (IP) Rating
Bettis RPE actuators are IP66/IP67 rated. In case of IP66 or IP67 requirements,
take precautions that comply with the IP66/IP67 requirements to prevent moisture or dust
from entering the actuator through the open air exhaust port(s), either directly on the
actuator or at the exhaust ports of the connected solenoid valve.
We recommend to connect tubing to the exhaust(s) and lead this into a dry and dust free
area, or to use check valves in the exhaust.
Cycle time in seconds
Actuator
size
Spring-Return Double-Acting
A-port
pressurized
Spring
stroke
A-port
pressurized
B-port
pressurized
25 0.5 0.4 0.5 0.4
40 0.6 0.5 0.6 0.5
65 0.7 0.5 0.6 0.6
100 0.8 0.6 0.8 0.7
150 1.0 0.8 0.9 0.8
200 1.3 0.9 1.0 1.0
350 1.9 1.3 1.4 1.5
600 3.2 1.9 2.2 2.2
950 6.6 2.2 2.4 2.0
1600 10.6 3.5 3.6 3.3
2500 16.9 5.7 5.8 5.2
4000 29.1 9.2 9.2 9.0

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A
BA
AB
B
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Installation
Section 4: Installation
4.3.3 Double-Acting Actuators
The operating principle, as explained here, is applicable for actuators with assembly code
CW (direct acting).
• Applying supply pressure to port A will move the pistons outward to the "Open"
position of the valve.
• Applying supply pressure to port B will move the pistons inward to the "Close"
position of the valve.
• For assembly codes CC, the operating principle is reversed (reverse acting).
Figure 5 Double-Acting Operation
Outward Stroke
Inward Stroke

13
A
A
A
A
A
A
A
A
A
A
A
AB
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Installation, Operation and Maintenance Manual
DOC.IOM.BE.EN Rev. 12 October 2021
Installation
Section 4: Installation
4.3.4 Spring-Return Actuators
The operating principle, as explained here, is applicable for actuators with assembly code
CW (direct acting).
• Applying supply pressure to port A will move the pistons outwards to the "Open"
position of the valve.
• Venting the supply pressure from port A will cause the springs to move the pistons
inwards to the "Close" position of the valve.
• For assembly codes CC, the operating principle is reversed (reverse acting).
Figure 6 Stroke Movements
Outward Stoke
Inward Stroke

14
AB AB
A
BA
B
AB
AB
A
B
A
B
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Installation
Section 4: Installation
4.4 Actuator Assembly Codes
Figure 7 Assembly Code - Double-Acting
Assembly code: CW Assembly code: CC
= Standard, Clockwise-to-Close rotation = Reverse, Counterclockwise-to-Open
= Fail-to-Close = Fail-to-Open
A = Rotation when central air chamber is pressurized.
B = Rotation when end cap air chambers are pressurized.
All views are from above. Pistons are shown in inward position.
Figure 8 Assembly Code - Spring-Return
Assembly code: CW Assembly code: CC
= Standard, Clockwise-to-Close rotation = Reverse, Counterclockwise-to-Open
= Fail-to-Close = Fail-to-Open
Pinion and cam
position
Pinion 90°
rotated
Default pistons
position
Dot in pinion
slot
Reversed
pistons position
Pinion and cam
position
Pinion 90°
rotated
Default pistons
position
Dot in pinion
slot
Springs
Reversed
pistons position

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Installation
Section 4: Installation
4.5 Actuator to Valve Installation
! WARNING
Actuator must be isolated pneumatically and electrically before any (dis)assembly starts.
Stay away from moving parts to prevent serious injuries. When test cycling the actuator
and valve assembly by applying pressure to the A or B port, be aware that there are moving
parts like pinion top, actuator to valve coupling and the valve- blade, ball, plug, etc.
NOTICE
The actuator is designed to be installed, commissioned and maintained using generic tools
like wrenches, Allen keys and screwdrivers. For the removal of inserts, a special extractor
tool can be supplied on request.
During assembly to the valve, do not hit with hammer on pinion top. This can damage the
pinion top washer and cause premature failure.
Before mounting the actuator on the valve or valve bracket, be sure that both the actuator
and the valve are in the same closed or open position.
Refer to Appendix B, Tool and Torque tables, for using the right size tool.
Table 7. Tool Table
Figure 9 Valve handle removal
1. Remove handle nut, handle, lock washer, and etc. from the valve if required.
2. Visually check to make sure the valve is CLOSED.
Symbol Tool Symbol Tool
Wrench – All types and sizes.
Metric and Imperial Allen key
Circlip Pliers

16
90°
45°
90°
90°
23
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Installation
Section 4: Installation
3. When required, check if the insert drive (23) is mounted. If not, use a plasticmallet
and tap slightly until the reducer square is in the required position.
Figure 10 Insert drive Installation
Figure 11 Bracket Installation
4. Install the bracket to the valve ange. Tighten all bolts and nuts and apply the
correct torque.
Parallel square
Diagonal
square
Flat head
Round with
key way