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
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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.

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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.