Emerson Bettis RTS User manual

Installation, Operation and Maintenance Manual
VCIOM-15429-EN Rev. 1
July 2021
Bettis RTS
Ball Screw Linear Drives

VCIOM-15429-EN Rev. 1
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Notes Installation, Operation and Maintenance Manual
July 2021 VCIOM-15429-EN Rev. 1

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Table of Contents
Installation, Operation and Maintenance Manual
July 2021
VCIOM-15429-EN Rev. 1
Table of Contents
Table of Contents
Section 1: General
General....................................................................................................................1
Section 2: Structure
Structure..................................................................................................................2
Section 3: Packaging, Transport and Storage
Packaging, Transport and Storage............................................................................5
Section 4: Assembly and Disassembly of Linear
Units on Valves
4.1 Security and Assembly Instructions............................................................... 6
4.2 Assembly ...................................................................................................... 7
4.3 Disassembly.................................................................................................. 7
Section 5: Commissioning
Commisioning.........................................................................................................8
Section 6: Maintenance
6.1 Moving Interval ............................................................................................. 9
6.2 Greasing Interval........................................................................................... 9
Section 7: Lubricant Recommendation
Lubricant Recommendation....................................................................................10

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Installation, Operation and Maintenance Manual
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General
Type Actuator Output
Flange Stroke Output Thread Pitch Factor (Nm/kN)
Weight
(kg)
LK50 CM03 G0/F10 50 mm M20x1.5 mm 5 mm/rev 1.06 12.3
LK100 CM03 G0/F10 100 mm M20x1.5 mm 5 mm/rev 1.06 15.0
LK120 CM06 G0/F10 120 mm M20x1.5 mm 5 mm/rev 1.06 19.2
CM06 G1/2 F14 120 mm M36x3 mm 5 mm/rev 1.06 23.6
1
Section 1: General
Section 1: General
Type ball screw linear drives units are offered in different variants, see Table 1. These are
mounted together with electric open/close or modulating actuators, of the series CM, on
valves which require a linear positioning movement. These linear units convert the torque
output from the actuator into an axial force through a ball screw drive. Not only is a higher
control accuracy allowed, but also a longer lifetime is provided with the use of a ball screw
drive. The combination of actuator and linear unit, is based on the required thrust and the
necessary stroke.
Table 1. Technical Data Linear Units

Installation, Operation and Maintenance Manual
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Structure
2
Section 2: Structure
Section 2: Structure
Figure 1 shows e.g. a CM-32 actuator with mounted LK100 linear unit. The linear unit
itself consists essentially of a solid cast housing, a mounted spindle nut and a non rotating
spindle, see Figure 2. To prevent contamination by dusty ambient air and to ensure the
mechanical protection, the linear unit is completely sealed with O-Rings at the output.
Figure 1 CM-32-Actuator with Mounted LK100 Linear Unit

Installation, Operation and Maintenance Manual
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Structure 3
Section 2: Structure
Figure 2 shows the exploded drawing of the linear unit. The parts are listed in Table 2.
Figure 2

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Structure
Part Number Description
1Output ange
2 O-Ring
3Groove nut
4 Bearing plate
5 Axial deep groove ball bearing
6 Bearing ring
7Intermediate ange
8 O-Ring
9 Housing tube
10 O-Ring
11 Base ange
12 O-Ring
13 Wiper
14 Feather key
15 Ball screw spindle
16 Feather key
17 Coupling and output shaft
18 Cup spring
19 Spindle pin
20 O-Ring
21 Spindle pin ring nut
22 O-Ring
4
Section 2: Structure
Table 2. Parts List of the Linear Unit

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Packaging, Transport and Storage 5
Section 3: Packaging, Transport and Storage
Section 3: Packaging, Transport and Storage
See chapter "Packaging, Transport and Storage" in the standard user manual.

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6Assembly and Disassembly
Section 4: Assembly and Disassembly
Section 4: Assembly and Disassembly of
Linear Units on Valves
In the following two subsections, the procedures for assembly and disassembly of linear
units on valves are explained step by step.
4.1 Security and Assembly Instructions
! WARNING
The device may only be mounted and commissioned by qualied personnel!
Qualied personnel within the meaning of this operating manual are persons who are
familiar, with assembly, commissioning and operation of this product, and have the
required appropriate qualications for this activity.
! WARNING
For assembly and disassembly of the linear unit, the pipes where the valve is installed
on must be depressurized. If the actuator is removed from the linear unit, the position
of the valve stem won’t be xed anymore and will be lost due to the linear units non
self-locking property.
! WARNING
The linear unit has end stops on both end positions. Do not move against the end stops in
electrical operation. The end limits of the actuator must be set accordingly. Never bring
the valve cone with excessive force in the CLOSED position. This can damage the high
quality sealing edges.

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7
Assembly and Disassembly
Section 4: Assembly and Disassembly
4.2 Assembly
1. Check that the actuator ange, the linear unit anges and the valve ange match.
2. Thoroughly clean screw-on surfaces and bare parts on actuator, linear unit and valve.
3. Lightly grease the connections of the actuator, the linear unit and the valve.
4. Grease the spindle of the linear unit.
5. Move the valve cone in the CLOSED position.
6. Turn the spindle nut until the linear unit is in a central position.
7. Mount the linear unit on the valve and tighten the screws crosswise. The coupling
between the linear unit and the valve will be connected later.
8. Mount the actuator on the linear unit and tighten the screws crosswise.
9. Extend the spindle by rotating the handwheel until the coupling of the linear unit
and the valve t together.
10. Connect the coupling between linear unit and valve.
11. Use the handwheel to move the linear unit to a center position, to prevent
accidental damage to the valve during start-up.
4.3 Disassembly
1. If the valve is fully closed, move the valve cone to about ten percent OPEN position.
2. Loosen the screws between the output ange of the actuator and the linear unit
and dismount the actuator.
3. Open the spindle coupling between the linear unit and the valve.
4. Loosen the screws between the output ange of the linear unit and the valve.
5. Dismount the linear unit from the valve.

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8Commissioning
Section 5: Commissioning
Section 5: Commissioning
See chapter Commissioning in the standard user manual.

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9
Maintenance
Section 6: Maintenance
Section 6: Maintenance
Pay attention to increased running noises, occur on them, grease the two lubrication
nipples of the linear unit to lubricate the bearings and the spindle guidance.
Regularly check the xing screws between the actuator, the linear unit and the
valve for rm hold, if necessary tighten them with the torques specied in chapter
"Installation Instuctions“ of the standard user manual.
6.1 Moving Interval
The linear unit should be actuated at least every 3 months.
6.2 Greasing Interval
Every 6 months the linear unit should be regreased via the greasing nipples.

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10 Lubricant Recommendation
Section 7: Lubricant Recommendation
Section 7: Lubricant Recommendation
Lubricating grease DIN 51825-K(P) R -40
i.e. Water repellent complex grease based on Al-soap with high resistance to acids and alkalis:
Ambient temperature: -40 bis +85 °C
Worked penetration 0.1 mm: 310 - 340
Dripping point: ca. 260 °C
NLGI-Class: 1
Acid free, not or only slightly reactive with water

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Notes
Installation, Operation and Maintenance Manual
July 2021

World Area Conguration Centers (WACC) offer sales support, service, inven-
tory and commissioning to our global customers.
Choose the WACC or sales ofce nearest you:
www.emerson.com/bettis
VCIOM-15429-EN ©2021 Emerson. All rights reserved.
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For complete list of sales and manufacturing sites, please visit
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