Emerson Bettis RPX Series Installation and operating manual

Safety Guide
DOC.SG.BRX.1 Rev. 1
October 2020
Bettis RPX-Series
Rack and Pinion Pneumatic Actuators

Safety Guide
DOC.SG.BRX.1 Rev. 1
Notes
October 2020
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Table of Contents
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Table of Contents
Table of Contents
Section 1: Safety Instructions
1.1 ANSI 534.6 Safety Messages............................... 1
Section 2: General Information
2.1 General Application............................................ 2
2.2 Inspection and Maintenance Schedules.............. 2
2.3 Parts Ordering.................................................... 3
Section 3: Bettis RPX Actuators
3.1 Installation......................................................... 5
3.2 Operation .......................................................... 6
3.3 Maintenance ...................................................... 8
Section 4: Actuator Accessories
Actuator Accessories........................................ 10
Section 5: Instructions for Use in (Potential)
Explosive Areas
5.1 Intended Use.................................................... 11
5.2 Safety Instructions ........................................... 11
5.3 Maximum Temperatures .................................. 13

Safety Guide
DOC.SG.BRX.1 Rev. 1
Notes
October 2020
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1
Section 1: Safety Instructions
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Safety Instructions
Section 1: Safety Instructions
Please read these safety warnings, cautions, and instructions carefully
before using the product.
These instructions cannot cover every installation and situation.
Do not install, operate, or maintain this product without being fully
trained and qualied in valve, actuator, and accessory installation,
operation and maintenance.
To avoid personnel injury or property damage, it is important to
carefully read, understand, and follow all of the contents of the
associated instruction manual, including all safety cautions and
warnings. If you have any questions concerning installation, or use of
this product, contact your Emerson sales ofce before proceeding.
1.1 ANSI 534.6 Safety Messages
!WARNING
Indicates a hazardous situation that, if not avoided, could result in
death or serious injury.
!CAUTION
Indicates a hazardous situation that, if not avoided, could result in
minor or moderate injury.
NOTE
Indicates information considered important, but not hazard-related.

2
Section 2: General Information
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
General Information
Section 2: General Information
2.1 General Application
Bettis Rack and Pinion Pneumatic actuators are intended for the
automation and operation of quarter-turn valves like Buttery, ball
valve and plug valves.
Rack and Pinion actuators can also be used to operate venting louvers
or any other quarter-turn applications.
This product was intended for a specic range of service conditions:
pressure, ambient temperature, operating media, and possibly other
specications. Do not expose the product to service conditions or
variables other than those for which the product was intended.
If you are not sure what these conditions or variables are, contact your
Emerson sales ofce for assistance. Provide the product type, size, serial
number and all other pertinent information that you have available.
2.2 Inspection and Maintenance Schedules
Bettis RPX actuators must be inspected periodically and maintained
as needed. Refer to the maintenance section of manual Bettis RPX
DOC.IOM.BRX.EN for more detailed information. The schedule for
inspection can only be determined based on the severity of your
service conditions. Your installation might also be subject to inspection
schedules set by applicable governmental codes and regulations,
industry standards, company standards, or plant standards.
In order to avoid increasing dust explosion risk, periodically clean dust
deposits from all equipment.
When equipment is installed in a hazardous area (potentially
explosive atmosphere), prevent sparks by proper tool selection and
avoiding other types of impact energy.
Proper care must be taken to avoid generation of static electricity on
the non-conductive external surfaces of the equipment (e.g. rubbing
of surfaces, etc.). The actuator's surface temperature is dependent
upon process operating conditions.

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Section 2: General Information
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
General Information
2.3 Parts Ordering
When ordering parts for older products, always specify the type,
size and serial number of the product and provide all other pertinent
information that you can, such as part material, age of the product, and
general service conditions. If you have recongured the product since
it was originally purchased, include that information with your request.
!WARNING
Use only genuine replacement parts. Components that are not
supplied by Emerson should not, under any circumstances, be used in
any BETTIS RPX product. Use of components not supplied by Emerson
may void your warranty, might adversely affect the performance of
the product, and could cause personal injury and property damage.

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Section 3: Bettis RPX Actuators
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Bettis RPX Actuators
Section 3: Bettis RPX Actuators
These safety instructions are limited to BETTIS RPX actuators which
are operating using compressed air. If the application requires use of
a ammable or hazardous gas, you must contact your Emerson sales
ofce for assistance.

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Section 3: Bettis RPX Actuators
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Bettis RPX Actuators
3.1 Installation
!WARNING
DO NOT EXCEED SPECIFICATION. To avoid personal injury and
property damage caused by bursting of parts and to avoid parts
damage, malfunction of control valve, or loss of control of the process
caused by excessive pressure, do not exceed the maximum pressures
or temperatures for this actuator, as given in the applicable product
literature or on the nameplate. Use pressure-limiting or pressure-
relieving devices to prevent the actuator pressure from exceeding
specied limits. If you cannot determine the limits for this product,
contact your Emerson sales ofce before proceeding.
• To avoid personal injury, always wear protective gloves,
clothing and eye wear when performing any installation
• If hoisting the actuator, use a nylon sling to protect the
surfaces. Carefully position the sling to prevent damage
to the actuator tubing and any accessories. Also, take care
to prevent people from being injured in case the hoist or
rigging slips. Be sure to use adequately sized hoists and
chains or slings to handle the assembly. If an actuator/valve
assembly should be lifted, it is strongly recommended to
connect the nylon lifting slings in such way that the actuator
and valve is supported.
• Check with your process or safety engineer for any
additional measures that must be taken to protect against
process media.
• If installing into an existing application, also refer to the
WARNING in the Maintenance section.
• Do not connect a pressure vessel, to the actuator, with
unrestricted media.
• Do not exceed the MAXIMUM stated operating pressures.
• Applying pressure directly to the actuator can turn the
actuator's shaft/Valve stem.
• Applying a control signal to the actuator's solenoid can turn
the Actuator/Valve assembly.

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Section 3: Bettis RPX Actuators
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Bettis RPX Actuators
! WARNING
Stay away from moving parts to prevent serious injury. 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 stem, ball, plug, etc.
Isolate the piping system on which an actuator-valve assembly
is installed, when removing this assembly, and relieve any media
pressure that may be trapped in the valve cavities before removing
the actuator for maintenance.
3.2.1 Operating Media
1. Use clean, dry or lubricated air.
2. Maximum Operating Pressure (MOP) = 8.3 bar/120 psi
(Dynamic)
MOP is the pressure required to produce the maximum rated
torque at the break position for all actuators.
Pressure should not exceed MOP during valve rotation.
MOP should be the maximum pressure regulator setting.
3.2 Operation
!WARNING
When rotating the actuator stem or shaft with loading pressure
applied, use caution to keep hands and tools out of the actuator
travel path. Personal injury and property damage is possible if
something is caught between the actuator stem and other control
valve assembly parts.

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Section 3: Bettis RPX Actuators
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Bettis RPX Actuators
!WARNING
It can be assured that the housing will not rupture or burst when
applying 10 bar of pressure but the cycle function cannot be
guaranteed as it totally depends on the time span to which actuator is
subjected at 10 bar and the frequency at which these pressure peaks
occurs. Every time this peak occurs will, for sure, have a signicantly
negative effect on the life expectancy of the actuator.
3. Spring stroke of spring-return actuators should not
operate pneumatically.
4. Dew point at least 10K below ambient temperature.
5. For subzero applications take appropriate measures.
6. Mentioned pressure levels are "gauge pressures".
Gauge pressure is equal to absolute pressure minus
atmospheric pressure.
3.2.2 Operating Temperature Range
1. Using standard seals and greases the operating temperature
range is -20 °C to + 80 °C (-4 °F to +176 °F)
as is indicated on
the product label.
2. Other medias and temperatures may be used but
consult your local Emerson sales ofce for conrmation
as to suitability.

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Section 3: Bettis RPX Actuators
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Bettis RPX Actuators
3.3 Maintenance
Before mounting or (dis) assembling the actuator consult the relevant
sections of the installation, operation and maintenance manual for
more detailed maintenance information.
!WARNING
Avoid personnel injury or property damage from sudden release
of process pressure or uncontrolled movement of parts. Before
performing any maintenance operations:
• Always wear protective gloves, clothing, and eye wear.
• Disconnect any operating lines providing air pressure,
electric power, or a control signal to the actuator. Be sure
the actuator cannot suddenly open or close the valve.
• Do not remove the actuator from the valve while the valve is
still pressurized.
• Vent any pneumatic pressure from the actuator and relieve
any actuator spring pre-compression.
• Use lock-out procedures to be sure that the above measures
stay in effect while you work on the equipment.
• Never apply pressure to a partially assembled actuator
unless all pressure-retaining parts have been installed
properly.
• Check with your process or safety engineer for any
additional measures that must be taken to protect against
process media.
• Do not remove the Pistons from the Actuator Body by using
air pressure when the End Caps have been removed.

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Section 3: Bettis RPX Actuators
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Bettis RPX Actuators
!CAUTION
Do not turn out the travel stops completely when the actuator is
pressurized. When adjusting the travel stops and the actuator is still
pressurized, the travel stops can “shoot” away when completely
turned out.
!CAUTION
Spring-return actuators contain springs in a compressed state.
Follow these instructions to release the spring force safely. The end
caps of spring-return actuators should be free of the spring load after
loosen end cap screw evenly (3-5mm). If there is still spring load on
the end cap, this might indicate a broken spring cartridge. Stop this
disassembly procedure immediately. Continuing might cause the end
cap to be “shot” away causing serious injury. Retighten the end cap
screws and return the unit to factory for service.
Refer to Appendix A of manual BETTIS RPX DOC.IOM.BRX.EN for
the instructions on how to safely remove the spring load before
disassembling the end cap from the spring-return actuator.
A spring-return actuator mounted on a valve, which is stuck in mid
stroke, contains a high spring load which will cause a sudden rotation
during disassembly of the actuator versus the valve or valve bracket.
This can cause serious injury to personnel or equipment damage.
Refer to Appendix A of manual BETTIS RPX DOC.IOM.BRX.EN for
instructions to safely remove the spring load before disassembling
the actuator from a valve, which is stuck in mid stroke.

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Section 4: Actuator Accessories
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Actuator Accessories
Section 4: Actuator Accessories
The actuator may be equipped with components for control
and/or feedback. Check the instructions of these components for
installation, operation and maintenance instructions.

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Section 5: Instructions for Use in (Potential) Explosive Areas
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Instructions for Use in (Potential) Explosive Areas
Section 5: Instructions for Use in (Potential)
Explosive Areas
5.1 Intended Use
The BETTIS RPX pneumatic actuators are intended for use in areas in
which explosive atmospheres caused by mixtures of air and gases,
vapors, mists or by air/dusts are likely to occur. Therefore it may be used
in classied Zones 1, 2 with equipment protection level Gb (Gasses)
and/or Zones 21, 22 with equipment protection level Db (Dust).
5.2 Safety Instructions
1. Assembly, disassembly and maintenance, is only allowed at
the actuator, when, at the time of the activity, there are no
explosive mixtures.
2. Prevent entry of explosive mixtures into the actuator.
We suggest utilizing a solenoid with a "breather" function
on spring-return actuators when used in potentially
explosive atmospheres.
3. The plastic position indicator is non-conductive, which
could lead to electrostatic discharge. Therefore, additional
warning stickers are required when using the plastic
position indicators in certain potentially explosive (Ex) gas
group areas. Each indicator is shipped with an "Electrostatic
Hazard Warning Sticker" which must be applied to the
actuator according to the below schedule.

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Safety Guide
DOC.SG.BRX.1 Rev. 1
Instructions for Use in (Potential) Explosive Areas
Section 5: Instructions for Use in (Potential) Explosive Areas
October 2020
Actuator size Ex Gas group
IIA IIB IIC
Small indicator
(actuator sizes up
to size RPX052)
Ok to use
without
warning sticker
Ok to use
without
warning sticker
Apply the
electrostatic
hazard warning
sticker
Larger indicator
(actuator sizes
RPX084 up to
RPX240)
Apply the
electrostatic
hazard warning
sticker
Apply the
electrostatic
hazard warning
sticker
Apply the
electrostatic
hazard warning
sticker
Table 1.
4. In order to avoid increasing dust explosion risk, periodically
clean dust deposits from all equipment.
5. When equipment is installed in a hazardous area location
(potentially explosive atmosphere), prevent sparks by proper
tool selection and avoiding other types of impact energy.
6. Rack and pinion actuators do not have an inherent ignition
source due to electro-static discharge, but explosion
hazards may be present due to the discharge of static
electricity from other valve assembly components.
— To avoid personal injury or property damage, make
sure that the valve is grounded to the pipeline
before placing the valve assembly into service.
— Use and maintain alternate shaft-to-valve
body bonding, such as a shaft-to-body bonding
strap assembly.
7. Proper care must be taken to av
oid generation of static
electricity on the non-conductive external surfaces of the
equipment (e.g. rubbing of surfaces, etc.).
8. The paint protection must not exceed 200 μm if the
actuator is used in a group IIC atmosphere. For group IIA
or IIB atmospheres the paint protection must not exceed a
thickness of 2 mm (0.08").

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Section 5: Instructions for Use in (Potential) Explosive Areas
October 2020
Safety Guide
DOC.SG.BRX.1 Rev. 1
Instructions for Use in (Potential) Explosive Areas
5.3 Maximum Temperatures
!WARNING
The actuator's surface temperature is dependent upon process
operating conditions. Personal injury or property damage, caused by re
or explosion, can result if the actuator's surface temperature exceeds the
acceptable temperature for the hazardous area classication. To avoid an
increase of instrumentation and/or accessory surface temperature due
to process operating conditions, ensure adequate ventilation, shielding,
or insulation of these actuator components installed in a potentially
hazardous or explosive atmosphere.
Actuator
model
Temperature
Ambient
Range
Temp.
Class
Max.
(Surface Temp.)
Standard
Temperature
Version
-20 °C to 80 °C
(-4 °F to 176 °F) T6 85 °C (185 °F)
High
Temperature
Version
-15 °C to 150 °C
(-4 °F to 302 °F) T3 200 °C (392 °F)
Low
Temperature
Version
-52 °C to 65 °C
(-62 °F to 149 °F) T6 85 °C (185 °F)
Table 2. Temperature range for (potential)
explosive area’s

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