Emerson Bettis RGS Q-Series, Bettis Q205, Bettis Q210, Bettis Q214, Bettis Q203 Installation, Operation And Maintenance Manual
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Installation, Operation and Maintenance Manual
Bettis RGS Q-Series
Double-Acting Actuators
RGS011110-1 Rev. 0
November 2015
Installation, Operation and Maintenance Manual
RGS011110-1 Rev. 0
Table of Contents
Section 1: Overview ��������������������������������������������������������������1
Section 2: Installation �����������������������������������������������������������2
2.1 Valve Attachment ........................................................................................ 3
2.2 Accessory Mounting .................................................................................... 4
2.3 Piping and Operation ................................................................................... 4
2.4 Travel Adjustment ........................................................................................ 7
Section 3: Troubleshooting ������������������������������������������������ 10
Section 4: Maintenance
4.1 Periodic Maintenance Schedule ..................................................................11
4.2 Lubrication..................................................................................................11
4.3 Maintenance Kit ......................................................................................... 12
4.4 Piston Seal Replacement ............................................................................ 12
4.5 Body Maintenance ..................................................................................... 15
Table of Contents
November 2015
Appendix A: ������������������������������������������������������������������������22
A.1 Dual Cylinder Model .................................................................................. 22
A.2 Single Cylinder Model ............................................................................... 24
Table of Contents
I
Section 1: Overview
November 2015
Section 1: Overview
NOTE:
All activities must be carried out in order to ensure proper actuator operation.
Always read all instructions before beginning maintenance.
Bettis RGS Q-Series actuators are composed of two or three basic sub-assemblies, one or
two force modules and a torque module. The force module contains the piston and rack
which provide linear motion. The torque module contains the gear which converts the
force modules’ linear motion into torque and operates the valve.
Every actuator assembled by Bettis is tested prior to shipment to our customers.
Order specific documentation may be available upon request.
Installation, Operation and Maintenance Manual
RGS011110-1 Rev. 0
1
Overview
Installation, Operation and Maintenance Manual
RGS011110-1 Rev. 0
Section 2: Installation
Bettis actuators may be mounted in any position/orientation. If necessary, lift the actuator
with straps placed inside the framework of the body. Never lift the actuator by the cylinders,
tie rods, or travel stops. Lifting the actuator with the valve attached is not generally
recommended.
Figure 1
Section 2: Installation
November 2015
Installation
2
Section 2: Installation
November 2015
Threaded Lifting Eyes
Lifting eyes may be threaded into the body section and be used to lift the actuator.
Figure 2
Installation, Operation and Maintenance Manual
RGS011110-1 Rev. 0
2�1 Valve Attachment
NOTE:
Prior to mounting the actuator, verify alignment of coupler and shaft to ensure that the
valve will move to correct position.
Ensure the actuator is in the same position as the valve. It may be necessary to stroke the
actuator to determine the correct mounting orientation. Attach the actuator to the valve using
the proper bracket and coupler, or with a Bettis Universal Mounting Plate (UMP) if provided.
Using all mounting holes indicated on Bettis dimensional drawings, tighten all fasteners hand
tight, then torque the fasteners to the corresponding value on the table below.
Table 1�
Thread Pattern Ft-Lbs Nm
Q203/204/205
Q207/210 M10 32 43
Q212/214 M20 235 318
3
M6 7 9
M8 16 22
Installation
Installation, Operation and Maintenance Manual
RGS011110-1 Rev. 0
2�2 Accessory Mounting
As a standard, Bettis RGS Q-Series actuators are provided with NAMUR slotted accessory
mounting geometry. When installing accessories, such as switch boxes or positioners,
tighten accessory mounting bolts hand tight, stroke the actuator three times to ensure
proper alignment, then tighten the accessory mounting bolts to the proper torque.
Check the dimensional drawing or associated product data sheet for exact dimensions.
2�3 Piping and Operation
The operation of a Bettis RGS Q-Series Double-Acting (DA) actuator is comparable to any
double-acting rack and pinion actuator.
Instrument air, water, and other power gases and fluids may be used to cycle the actuator so long
as construction materials were chosen accordingly during assembly and maximum allowable
pressure is not exceeded. Air driven stainless-steel actuators with stainless-steel
or composite cylinders are not harmed by wet air (so long as freezing does not occur).
Aluminum and chrome-plated steel cylinders may be harmed over time by the presence of water.
Section 2: Installation
November 2015
WARNING: DO NOT EXCEED PRESSURE RATING
Exceeding the stated maximum pressure may result in damage to equipment and danger
to personnel including severe injury or death. Consult the actuator label for operating
limits. If an actuator label is missing, contact Bettis to request a replacement.
WARNING: DO NOT EXCEED TEMPERATURE RATING
Operating outside of the minimum and maximum temperature range may result in damage
to equipment and danger to personnel including severe injury or death. Consult the
actuator label for operating limits. If an actuator label is missing, contact Bettis to request a
replacement. An example of an actuator label is provided below for your reference.
Installation
NOTE:
CE marking indicates product conforms to the requirements of applicable directives as
listed on the actuator label.
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Section 2: Installation
November 2015
All Bettis actuators are shipped in the fail clockwise (Left-Hand) orientation unless
ordered as fail counterclockwise (Right-Hand). The orientation may be reversed in the
field by moving all accessories to the opposite side of the shaft and turning the actuator
top–side down.
Double-Acting (Left-Hand): pressure on the end cap ports pushes the pistons inward
and causes counterclockwise rotation. Pressure to the base plate ports pushes the
pistons outward resulting in a clockwise rotation.
Double-Acting (Right-Hand): pressure on the end cap ports pushes the pistons inward
and causes clockwise rotation. Pressure to the base plate ports pushes the pistons
outward resulting in a counterclockwise rotation.
Figure 3
Installation, Operation and Maintenance Manual
RGS011110-1 Rev. 0
Left-Hand
Right-Hand
Piping Guidelines:
• For dual cylinder models (205, 210, and 214), both end cap pressure ports
(P1 and P2) must be utilized for proper operation.
• P1 and P2 are typically connected together and powered by a single air pathway.
• For single cylinder models (203, 204, 207, and 212), P2 does not exist.
• P3 is a pressure port on the body.
5
Installation
Installation, Operation and Maintenance Manual
RGS011110-1 Rev. 0
Figure 4
205DA, 210DA, 214DA
P3
P2
P3
Section 2: Installation
November 2015
P1
P1
P2
Figure 5
203DA, 204DA, 207DA, 212DA
P3
P1
P3
P1
Installation
6
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