Installation, Operation and Maintenance Manual
GVO-LP-DA Linear Valve Operator
E-90090001 Rev. A
May 2014
Installation, Operation and Maintenance Manual
E-90090001 Rev A
Table of Contents
Section 1: Safety Warning
Section 2: Introduction
2.1 General Service Information .......................................................................... 2
2.2 Denition of Terms ........................................................................................ 2
2.3 Scope ........................................................................................................... 3
2.4 Model Identication ...................................................................................... 3
Section 3: Storage Instructions
Section 4: Operation
Table of Contents
May 2014
Section 5: Preparation
Section 6: Installation
6.1 Notes .......................................................................................................... 10
6.2 Lifting ......................................................................................................... 11
6.3 Procedures of Installation ............................................................................ 12
Section 7: Maintenance
7.1 Regular Maintenance .................................................................................. 15
7.2 Disassembly ................................................................................................ 15
7.3 Inspection and Cleaning .............................................................................. 17
7.4 Reassembly ................................................................................................. 18
Section 8: Operator End Stop Adjustment
8.1 End Stop Adjustment Conditions ................................................................. 21
Section 9: Testing and Troubleshooting
9.1 Testing ........................................................................................................ 23
9.2 Troubleshooting .......................................................................................... 23
Section 10: Document Revision
Table of Contents
Appendix A: List of Tables
Appendix B: List of Figures
I
Section 1: Safety Warning
May 2014
Installation, Operation and Maintenance Manual
Section 1: Safety Warning
All personnel involved should read and understand all applicable sections of this manual
before attempting to install, operate, service or perform maintenance on any operators.
Adhere to any tags, warning labels or instructions present on the operator.
These may provide information more specic and signicant regarding the operator than
this general manual can.
It is the responsibility of the user to ensure proper safety, always take necessary
precautions and utilize proper personal protective equipment when dealing with
compressed air, compressed hydraulic uid, pinch points and electricity.
It is necessary to rig and lift valve and operator separately. Service personnel need to
ensure the lifting capacity of the crane/hoist/rigging is appropriate for the desired load.
Before attempting to install or service, block power gas supply and depressurize system.
Isolate the power gas from controls if operator is supplied with control system.
In most applications, caustic gases and uids may be contained in the operators and valves.
In order to prevent personnel injury, all poisonous or ammable gases must be vented and
all liquids have to be stored in a safe location. Discharge at sonic velocity may occur when
venting or releasing pressure; service personnel must utilize proper hearing protection.
E-90090001 Rev A
The following are general instructions since there are variations of linear operators and valves.
It is critical to install the operator properly so that performance and safety are guaranteed.
Any technicians using the following instructions must be trained and knowledgeable regarding
valve operators and valves.
CAUTION: DISASSEMBLE OPERATOR CAREFULLY
It is required to go through the above instructions which will help to prevent personnel
injury, property damage and damage to operator.
Please refer to the applicable section for details and further information.
1
Safety Warning
Installation, Operation and Maintenance Manual
E-90090001 Rev A
Section 2: Introduction
2.1 General Service Information
This Installation, Operation and Maintenance (IOM) manual is for GVO Series Pneumatic
Double Acting Linear Valve Operators. Failure to comply with installation, operation and
maintenance instructions will void the warranty and may result in severe injury and/or
property damage.
2.2 Definition of Terms
The abbreviations included in this IOM manual are listed in the table below:
Table 1. Definition of Terms
Section 2: Introduction
May 2014
Abbreviated
Ter m
IOM Installation, Operation and Maintenance
GVO Gate Valve Operator Series
LP Low Pressure Pneumatic
DA Double Acting
TDM Tandem Power Cylinder
ID Inside Diameter [inch]
OD Outside Diameter [inch]
BCD Bolt Circle Diameter
MOT Maximum Operator Travel
MVT Maximum Valve Stem Travel
MAWP Maximum Allowable Working Pressure
Definition
WARNING
If not observed, user incurs a high risk of severe damage to operator and/or fatal injury to
personnel.
CAUTION
If not observed, user may incur damage to operator and/or injury to personnel.
Introduction
NOTE:
Advisory and information comments provided to assist maintenance personnel to carry out
maintenance procedures.
2
Section 2: Introduction
May 2014
2.3 Scope
This manual is a resource for technicians involved in the installation, operation and maintenance
of Bettis™ Gate Valve Operator (GVO) Series Pneumatic Linear Valve Operators. It serves as a
guide and must be thoroughly understood prior to any work on the operators such as
installation, operation or maintenance. For any questions, please contact the manufacturer.
2.4 Model Identification
The Bettis GVO Pneumatic Series represents a broad range of eld-proven linear valve
operators suitable for automating most types of rising stem valves in safety shutdown and
control applications. Figure 1 shows the typical assembly drawing of GVO-LP-DA operator
with an open pedestal with the key terminology. For a full listing of items, refer to the typical
sectional assembly drawing Figure 7. GVO-LP-DA with Open Pedestal.
Figure 1 Typical Assembly of GVO-LP-DA on Valve
Installation, Operation and Maintenance Manual
E-90090001 Rev A
3
Introduction
Installation, Operation and Maintenance Manual
E-90090001 Rev A
The catalog lists standard models intended to cover a wide range of sizes and applications.
Customers can use Figure 2. Linear Valve Operator Model Designation to identify the key
operator characteristics. If not included in the catalog lists, custom designed models are
also available for specialized thrust or stroke requirements or those beyond the scope of
this listing, including linear hydraulic operated operators.
Figure 2 Linear Valve Operator Model Designation
Section 2: Introduction
May 2014
To illustrate, a model number of 16x10x2.50-GVO-LP-DA-MH is an operator with a 16 [inch]
inside diameter cylinder (17), a 10 [inch] maximum stroke (adjustable down to 8 [inch]
stroke), a 2.5 [inch] OD drive rod (1) and is low-pressure pneumatic double acting with a
manual hydraulic override. Operators will also be identied with an individual serial number.
Figure 3. Linear Valve Operator Serial Number shows the form of the Bettis serial number.
Figure 3 Linear Valve Operator Serial Number
For example, a serial number of 00-123456-2.1 represents the rst unit on the second line
of sales order 123456.
Introduction
4
Sections 3: Storage Instructions
May 2014
Installation, Operation and Maintenance Manual
Section 3: Storage Instructions
Proper storage of the operator is required when the operator will not be put into
immediate service.
1. Remove all dirt, dust, grease and contaminants from the exposed drive rod (1)
surface by using a soft cloth dampened with an appropriate oil-based solvent.
Avoid using abrasive material when cleaning rod surfaces.
2. Retract the drive rod (1) into the operator by applying the air supply/Nitrogen
to the port(s) on the cylinder plate (4). Lightly grease portion of drive rod that
remains exposed.
3. The plastic plugs used to plug the pressure ports during assembly should be
removed and replaced with steel plugs. Any controls present should also be
plugged with steel plugs.
NOTE:
A sealant such as pipe dope or Teon tape should be applied to steel plug threads.
E-90090001 Rev A
4. Lightly lubricate all exposed threads and unpainted surfaces
(e.g. bottom of pedestal plate)
5. Cover the operator to prevent accumulation of dirt and debris.
6. In case the operator will be moved and stored again, the storage steps listed above
must be repeated to ensure the proper storage condition.
An indoor environment is the ideal storage condition for the operator.
For additional information on storage, please contact the manufacturer.
5
Storage Instructions
Installation, Operation and Maintenance Manual
E-90090001 Rev A
Section 4: Operation
The Double Acting operator functions when supply pressure is applied to the piston (11).
To extend the drive rod (1), pressure is applied through ports on the end cap (8) to exert force
on the cap side of the piston (11), pushing the drive rod (1) out of the operator.
To retract the drive rod (1), pressure is applied through ports on the cylinder plate (4) to exert
force on the drive rod side of the piston (11), pulling the drive rod (1) into the operator.
This will push in or pull out the connected valve stem. Upon loss of supply pressure, the
operator will stop wherever it is in its travel position. It has no predetermined failed position
unless there are some control components to command such a position.
Sections 4: Operation
May 2014
Operation
6
Section 5: Preparation
May 2014
Section 5: Preparation
Before beginning to work (installation, operation or maintenance) on an operator, please
be sure to read through all the applicable sections of the manual to ensure that you are
familiar with the expected sequence of events.
5.1 Tools
Listed are the recommended tools and materials that may be required when working on the
operator. Depending upon specic operator/task, additional tools and materials may be
required.
• Vernier/measurement ruler
• A set of SAE combination wrenches and sockets
• A set of SAE hex keys
• Strap or pipe wrench, small to medium sizes
• Large size ring wrench/hammer wrench
• Torque wrench with suitable rating
• Lifting device or a crane, complete with slings, a pair of shackles or clevises
• Air supply or nitrogen not exceeding the MAWP of the operator
• Block and bleed test valve assembly for air supply/Nitrogen
• Anti-seize (lubricant) compound
• Pipe thread sealant (e.g., Teon tape, pipe dope)
• Commercial solvent (e.g., Varsol)
Installation, Operation and Maintenance Manual
E-90090001 Rev A
5.2 Pre-Installation Verification
NOTE:
GVO linear operators shipped mounted to valves have their travel adjusted properly by the
manufacturer and do not require further adjustment. Install valve with GVO linear operator directly in line. GVO linear operators shipped without a valve have their travel adjusted
based on the valve topworks (if available). Verify and ne-tune (if needed) the travel adjustment when installing operator on the valve.
Before initial installation of the operator on the valve, there are several critical measurements
and markings to make. These measurements and markings cannot be made after the operator
is installed and are helpful for checking or adjusting travel. Please refer to Figure 4.
Measurement of Travel Adjustment for Valve and Operator when making measurements.
NOTE:
Marks should be made with a marker, wax pen, or other tool that will not damage the sealing surfaces of the operator.
7
Preparation
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