Bray FLOW-TEK 19 Series User manual

FLOW-TEK SERIES 19
SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
BRAY.COM THE HIGH PERFORMANCE COMPANY

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
2 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
CONTENTS
1.0 DEFINITION OF TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.0 PARTS IDENTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.0 VALVE IDENTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.0 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6.0 HANDLING REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.0 STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9.0 OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10.0 PREVENTATIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
11.0 ACTUATOR REMOVAL AND REMOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
12.0 REMOVING VALVE FROM PIPELINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
13.0 SEAT REPLACEMENT (S19 ASME 150, 300 | PN 10, 16, 25, 40) . . . . . . . . . . . . . . . . . . . . . . . . . 23
14.0 DISASSEMBLY AND INSPECTION (S19 ASME 150, 300 | PN 10, 16, 25, 40) . . . . . . . . . . . . . . . . . . 24
15.0 REASSEMBLY (S19 ASME 150, 300 | PN 10, 16, 25, 40). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
16.0 SEAT REPLACEMENT (S19 ASME 600) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
17.0 DISASSEMBLY AND INSPECTION (S19 ASME 600) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
18.0 REASSEMBLY (S19 ASME 600) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
19.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
20.0 RETURN MERCHANDISE AUTHORIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
21.0 APPENDIX A – TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
3 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
READ AND FOLLOW THESE INSTRUCTIONS CAREFULLY.
SAVE THIS MANUAL FOR FUTURE USE.
1.0 DEFINITION OF TERMS
1.1 All information within this manual is relevant to the safe operation
and proper care of your Bray valve. Please understand the
following examples of information used throughout this manual.
X.X IDENTIFIES CHAPTER HEADING
X.XX Indentifies and explains sequential procedure to be performed.
NOTE: Provides important information, useful tips, and
recommendations related to a procedure.
SAFETY STATEMENTS
The terms DANGER, WARNING, CAUTION, and NOTICE are used
in this document to prevent unwanted consequences. Standard
symbols and classifications are:
DANGER
Indicates an immediate hazardous situation which, if not avoided,
will result in death or serious injury and/or property damage.
WARNING
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury and/or property damage.
CAUTION
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury and/or property damage.
NOTICE
Indicates and provides additional technical information which
may not be obvious, even to qualified personnel. The term is not
used for personal injury hazards or warnings, but can be used to
indicate possible equipment or property damage.
1.2 Compliance with other notes — regarding transport, assembly,
operation & maintenance, and about technical documentation
(e.g., in the operating instructions, product documentation, or on
the product itself) — is essential, to avoid faults which can directly
or indirectly cause severe personal injury or property damage.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
4 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
2.0 INTRODUCTION
2.1 Information provided in this manual is for S19 segmented ball
valves only. Specific instructions for non-standard materials of
construction, temperature range, etc. should be referred to the
factory.
2.2 This manual covers S19 valves in the following range:
> NPS 1 to 16 | DN 25 to 400
> ASME Class 150, 300, 600 | PN 10, 16, 25, 40
> Body Style: Flanged, Flangeless
2.3 Additional product information (such as application data,
engineering specifications, actuator selection, etc.) is available
from your local Bray distributor or sales representative, or online
at BRAY.COM
2.4 For complete details on the latest product certifications, visit
BRAY.COM/Certifications.
2.5 The S19 segmented ball valve is designed per ASME B16.34.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
5 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
2324
141516
13
12
11
10
6
8
22
1
30
29
28
27
7
9
17
18
192021
3
4
526
2
25
Resilient Seat Metal Seat
3.0 PARTS IDENTIFICATION
3.1 Parts Callout (S19 ASME 150, 300 | PN 10, 16, 25, 40)
INTERCHANGEABLE SEAT DESIGN

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
6 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
ITEM DESCRIPTION RECOMMENDED
SPARE PARTS
Body
Seat 
Seat Spring 
Seat O-Ring 
Segment 
Stem Bearing 
End Post Bearing 
Stem
End Post
 Thrust Washer
 Stem Seal Kit 
 Gland Ring
 Gland Retainer
 Gland Stud
 Gland Lock Washer
 Gland Nut
 Post Cover Gasket 
 Post Cover
 Post Cover Washer
 Post Cover Stud
 Post Cover Nut
 Mounting Bracket
 Bracket Washer
 Bracket Screw
 Stem Pin
 End Post Pin
 Identification Plate
 Identification Plate Drive Screw
 Arrow Plate
 Arrow Plate Drive Screw
3.2 Parts List (S19 ASME 150, 300 | PN 10, 16, 25, 40)

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
7 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
22
21
18
8
6
7
9
10
11
27
14
12
13
5
2
3
4
29
28
26
31 33
30 32
19
151617
232425
20
1
Resilient Seat Metal Seat
3.3 Parts Callout (S19 ASME 600)
INTERCHANGEABLE SEAT DESIGN

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
8 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
ITEM DESCRIPTION RECOMMENDED
SPARE PARTS
Body
Seat 
Seat Spring 
Seat O-Ring 
Segment 
Stem
Stem Bearing 
Split Ring
Thrust Washer
 Packing Spacer
 Stem Seal Kit 
 Gland Ring
 Retaining Ring
 Gland Retainer
 Gland Stud
 Gland Lock Washer
 Gland Nut
 End Post
 End Post Bearing 
 End Post Thrust Washer
 Post Cover Gasket 
 Post Cover
 Post Cover Stud
 Post Cover Lock Washer
 Post Cover Nut
 Mounting Bracket
 Mounting Bracket Lock Washer
 Mounting Bracket Cap Screw
 Stem Pin
 Identification Plate
 Arrow Plate
 Identification Plate Screw
 Arrow Plate Screw
3.4 Parts List (S19 ASME 600)

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
9 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
4.0 VALVE IDENTIFICATION
4.1 Identification Tag
All valves, actuators, or control products are provided with a
permanently axed identification tag meeting the requirements
of applicable standards and certifications for the product.
As each product is unique, data may vary.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
10 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
5.0 GENERAL INFORMATION
5.1 Use
The following instructions are designed to assist in the unpacking,
installation, operation, and maintenance as required for Bray
segmented ball control valves.
Product users and maintenance personnel should thoroughly
review this manual prior to installing, operating, or performing
any maintenance.
In most cases, Bray valves, actuators, and accessories are
designed for specific applications (e.g. with regard to medium,
pressure and temperature). For this reason, they should not
be used in other applications without first contacting the
manufacturer.
WARNING
Before installing the equipment, confirm that it is suitable for the
intended service. The identification tags describe the maximum
allowable service conditions for this product. Be sure that the
installation is protected by appropriate pressure control and
safety devices to ensure that acceptable limits are not exceeded.
5.2 Operation
Operation of the valve is done by turning the stem a quarter-turn
(90 degree turn). Clockwise to close, counter-clockwise to open.
CAUTION
Valves with actuators should be checked for actuator/valve
alignment. Misalignment will result in high operational torque,
and cause damage to valve stem and seals.
5.3 Applicability
The following instructions are applicable to the maintenance
and installation of Bray segmented ball control valves. These
instructions cannot claim to cover all details of all possible
product variations, nor can they provide information for every
possible example of installation, operation, or maintenance.
This means that the instructions normally include only the
directions to be followed by qualified personal using the product
for its defined purpose. If there are any uncertainties in this
respect, particularly in the event of missing product related
information, clarification must be obtained via the appropriate
Bray sales oce.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
11 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
5.4 General Precautions
Bray products are often used in critical applications (e.g. under
extremely high pressures with dangerous, toxic, or corrosive
mediums). When performing service, inspection, or repair
operations, always ensure that the valve and the actuator are
depressurized, the valve has been cleaned, and the valve is free
of harmful substances.
In such cases, all personnel operating, inspecting, maintaining,
or repairing Bray products shall wear appropriate Personal
Protection Equipment (PPE), such as: protective clothing, gloves,
safety glasses, steel toes shoes, hard hat, etc.
5.5 Qualified Personnel
A qualified person (in terms of this document) is one who has
been authorized by those responsible for the safety of the plant
to perform the necessary work, while recognizing and avoiding
possible dangers.
Qualifications include appropriate education, training, experience,
and knowledge of relevant standards, specifications, operating
conditions, and accident prevention.
5.6 Spare Parts
Use only Bray original spare parts.
Recommended spare parts are identified in the Parts
Identification drawing and list for each product model.
Bray cannot accept responsibility for any damages that occur
from using spare parts or fastening materials from other
manufacturers. If Bray products (especially soft good materials)
have been stored for long periods of time, check them for
corrosion or deterioration before putting them into use.
5.7 Service & Repair
To avoid possible injury to personnel or damage to products,
safety terms must be strictly adhered to. Modifying this product,
substituting non-factory parts, or using maintenance procedures
other than those outlined in these Installation, Operation and
Maintenance instructions could drastically aect performance, be
hazardous to personnel and equipment, and may void existing
warranties.
Apart from the operating instructions and the obligatory accident
prevention directives valid in the country of use, all recognized
regulations for safety and good engineering practices must be
followed.
NOTICE
Before products are returned to Bray for repair or service, Bray
must be provided with a certificate confirming that the product
has been decontaminated and is clean.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
12 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
6.0 HANDLING REQUIREMENTS
6.1 Packed Valves
Crates: Lifting and handling of the packed valves in crates will be
carried out by a fork lift truck, by means of the appropriate fork
hitches.
Cases: The lifting of packed valves in cases will be carried out in
the lifting points and in the center of gravity position which has
been marked. The transportation of all packed material must be
carried out safely and following the local safety regulations.
NOTICE
When lifting the valve from shipping container, use straps through
valve body. Take care to position lifting straps to avoid damage to
the tubing and mounted accessories.
6.2 Unpacked Valves
Lifting and handling of valves should be carried out by using
appropriate means and observing the carrying limits. Handling
must be carried out on pallets, protecting all machined surfaces
to avoid any damage.
With large bore valves, rigging the load must be carried out by
using the appropriate tools to prevent the valve from falling or
moving during the lifting and handling.
CAUTION
For handling and/or lifting, the lifting equipment (fasteners, hooks,
etc.) must be sized and selected while considering the product
weight indicated in our packing list and/or delivery note.
Lifting and handling must be performed only by qualified personnel.
Fasteners must be protected by plastic covers in sharp corner areas.
Caution must be taken during handling to avoid this equipment
passing over workers, or over any other place where a possible fall
could cause injury or damage. In all cases, local safety regulations
must be respected.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
13 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
6.3 Packing List
Check the packing list against the materials received. Lists
describing the valve and accessories are included in each
shipping container and general assembly drawing as applicable.
WARNING
Never lift the valve or valve package by the actuator, positioner,
limit switch or their piping. When lifting a valve, be aware that
the center of gravity may be above the lifting point. Therefore,
support must be given to prevent the valve from rotating. Failure
to do so can cause serious injury to personnel and damage to the
valve and nearby equipment.
Contact your shipper immediately if there is shipping damage.
Should any problem arise, contact your Bray representative.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
14 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
7.0 STORAGE
NOTICE
Failure to follow these procedures could aect product warranty.
The packaging is designed to protect the product only during
shipping. If the product is not installed immediately after delivery,
then it must stored according to these requirements.
These are general guidelines for valve storage. Storage guidelines
for accessories fitted on valves shall be as per respective
Installation, Operation and Maintenance manual. Please consult
the factory for information regarding specific requirements.
7.1 Short-Term Storage
Short-term storage is defined as storage of products and/or
equipment to be used in the construction of a project within a
relatively short amount of time (typically one to three months).
During short-term storage, the following is required:
7.1.1 The preferred storage location is a closed, clean, and dry
environment. Do not expose the product to temperature
extremes.
7.1.2 Valve should be stored in closed position.
7.1.3 End protectors shall remain on valve ends to prevent the entrance
of dirt, debris, or insects/wildlife.
7.1.4 Product shall remain in the original shipping container with the
original packaging materials. (This packaging method will not
protect products that will be stored outside, uncovered, and
unprotected.)
7.1.5 Storage of products in an open, uncovered area is permissible,
but requires provisions for inclement weather. The product must
elevated from the ground on a pallet, a shelf, or other suitable
surface, and must be covered with a secure, waterproof tarp.
CAUTION
Do not stack the products on top of each other.
7.1.6 Manually actuated valves may be stored in the vertical or
horizontal position. For air or hydraulically actuated valves, the
preferred orientation is with the valve and cylinder in the vertical
position. Access ports should be secured to prevent unauthorized
entry and prevent contamination.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
15 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
7.2 Long-Term Storage
Long-term storage is defined as storage of products and/or
equipment for periods longer than three months.
During long-term storage, the following is required:
7.2.1 The preferred storage location is a closed, clean, and dry
environment. Do not expose the product to temperature
extremes.
NOTICE
The preferred temperature range is 40°F (4°C) to 100°F (38°C).
For long-term storage in temperatures lower or higher than
the preferred range, please consult the factory for information
regarding specific requirements.
7.2.2 Valve should be stored in closed position.
7.2.3 End protectors shall remain on the valve ends to prevent the
entrance of dirt, debris, or insects/wildlife.
7.2.4 Product shall remain in the original shipping container with the
original packaging materials.
CAUTION
Do not stack the valves on top of each other.
7.2.5 Manually actuated valves may be stored in the vertical or
horizontal position. For air or hydraulically actuated valves, the
preferred orientation is with the valve and cylinder in the vertical
position. Access ports should be secured to prevent unauthorized
entry and prevent contamination.
7.2.6 Valves and equipment containing elastomers, including O-rings,
must be stored in a climate-controlled warehouse with these
conditions:
> The ambient relative humidity to be less than 75%.
> No exposure from direct ultraviolet or sunlight.
> Protection from ozone generating equipment or combustible
gases and vapors.
> Storage at temperatures below 100°F (38°C), away from direct
sources of heat.
> No exposure to ionizing radiation.
7.3 Storage Inspection
A visual inspection (with results recorded) shall be performed
every three months to ensure the above conditions are maintained.
7.3.1 Inspection, as a minimum, shall include reviewing the following:
> Packaging.
> Flange covers.
> Dryness.
> Cleanliness.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
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contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
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8.0 INSTALLATION
8.1 Position
Bray’s segmented ball valve is designed to be mounted between
ASME or PN flanges. (Follow the direction of the flow arrow plate
attached to body.)
NOTE: For flangeless design, the segment may extend into piping
when operated to the OPEN position. Piping must be large enough
to allow the segment to clear the pipe when operated. (Refer to
the appropriate general assembly drawing for clearances.)
WARNING
To avoid serious injury, keep hands, hair, clothing, etc. away from
the segment and seat when the valve is working.
CAUTION
If handle or actuator has been removed, do not rotate segment
beyond fully open or closed position, as this could cause damage
to sealing surfaces.
Provide proper overhead clearance to allow for disassembly
of the actuator from the valve body. (Refer to the appropriate
General Assembly Drawing for proper clearances.)
Provide necessary support for accessories when center of gravity
for complete assembly is further o from pipe center line. (Refer
to the appropriate General Assembly Drawing for center of
gravity position.)
8.2 Cleaning
Before installing the valve, clean the pipeline of all contamination,
carbon deposits, welding chips, and other foreign material.
Carefully clean gasket surfaces to ensure a tight seal. Pipelines
must be correctly aligned to ensure that the valve is not fitted
under tension.
CAUTION
Before installation, check the order number, serial number,
and/or tag number to ensure that the valve and actuator being
installed are correct for the intended application.
Check the direction of fluid flow to ensure that the valve is
correctly installed. (Flow direction is indicated by the arrow on
the body.)

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
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contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
8.3 Orientation
With the segment in the closed position, carefully center the
valve between the pipe flanges. For flanged end valves, ensure
holes are aligned between valve and pipe flanges. For flangeless
valves, ensure gaskets and valve end connections are centered
and aligned with respect to serrations provided on the valve ends
and the piping connection.
8.3.1 The S19 is to be installed in line per the flow arrow tag attached
to the body with the seat ring in the upstream flow position.
8.3.2 Installation orientation may vary with certain applications and the
flow arrow should be referenced prior to installation.
NOTICE
Bray segmented ball valves may be installed with the bore in the
horizontal or vertical orientation. When installed with the bore in
the horizontal orientation, it is recommended to also place the
stem in the horizontal position, resulting in the segment opening
towards the top of the body cavity.
8.4 Gaskets
Gaskets should conform to the requirements of API 601 for ASME
B16.5 class flanges. Spiral wound gaskets, such as Flexitallic
CG or CGl series, conforming to ASME B16.20 or EN 1514-2 are
acceptable.
8.5 Bolting
Use standard flange bolting torques in accordance with the
gasket manufacturers recommendations for gasket compression
when bolting valve into the line. (Tighten alternately according to
good practice. Torque should be applied incrementally to evenly
load the end flange gasket.)
The user must, in all cases, confirm the capacity of the bolts to
ensure a suciently tight gasket seal for the expected service
conditions.
8.6 Actuator
8.6.1 If possible, install the valve so that the actuator can be
disconnected without removing the valve from the piping.
8.6.2 The actuator must not touch the pipeline, because pipeline
vibration may damage it or interfere with its operation. In
some cases (for instance when a large-size actuator is used, or
when the pipeline vibrates heavily) supporting the actuator is
recommended.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
18 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
8.7 Air Supply
For valves with pneumatic actuator & accessories, connect the air
supply and instrument signal lines.
8.7.1 Throttling control valves are equipped with a valve positioner.
Connections are marked for the air supply and the instrument
signal. Check that the actuator and positioner can withstand the
maximum air supply from the network. The required air supply
is indicated on a sticker located on the actuator. An air regulator
will be necessary (in certain cases) to limit the air supply pressure
to the actuator, if the supply exceeds the maximum allowable
pressure of the actuator.
8.7.2 An air filter is recommended unless the air supplied is exceptionally
clean and dry (air quality without humidity, oil, or dust as per IEC
770 and ISA-7.0.01).
8.7.3 All connections must be completely tight.
CAUTION
On valves equipped with air filters, the air filter must point down
to perform properly.
8.8 Pre-Commissioning Check
Before commissioning, check the valve by following these steps:
8.8.1 Check for full stroke by varying the instrument signal settings
appropriately. Observe the segment position indicator located
on the actuator or the positioner. The segment should change
position with a smooth turning movement.
8.8.2 For valves with pneumatic actuator & accessories, check all air
connections for leaks. Tighten or replace any leaking lines.
8.8.3 Check packing gland retainer bolting for proper tightness.
CAUTION
Do not over tighten packing. This can cause excessive packing
wear and high stem friction that may impede stem movement.
After the valve has been in service for a short period, recheck
the packing gland retainer nuts. If packing leaks exist, tighten
the gland nuts until leak stops. Do not exceed maximum torque
values. (Refer to Tables in Appendix A.)
8.8.4 Ensure the valve fails in the proper direction if actuating medium
supply is lost. This is done by positioning the valve at mid stroke,
then shutting o the actuating medium supply to observe the
failure direction.
If the action is incorrect, refer to the appropriate actuator
Installation, Operation, and Maintenance manual for instructions.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
19 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
9.0 OPERATION
9.1 Operation
Operation of the valve is done by turning the stem a quarter-turn
(90 degree turn).
> The stem is turned clockwise to close, counter-clockwise to
open.
9.2 Indication
The valve open and closed position are indicated by the position
of indentation on the stem.
> Valve OPEN position: Flats of Double-D stem are parallel to
pipeline.
> Valve CLOSED position: Flats of Double-D stem are perpedicular
to pipeline.
CAUTION
Valves with actuators should be inspected for actuator/valve
alignment. Misalignment will result in high operational torque and
damage to valve stem and seals.
OPEN
CLOSED
Stem
Indentation
Stem
Indentation
Figure 1: Indication of valve
Open and Closed position.

FLOW-TEK SERIES 19 SEGMENTED BALL VALVE
Installation, Operation, and Maintenance Manual
20 of 39© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
10.0 PREVENTATIVE MAINTENANCE
10.1 At least once every six months, check for proper operation by
following the preventative maintenance steps outlined below.
These steps may be performed while the valve is in line and
without interrupting service. If an internal problem is suspected,
refer to Troubleshooting section in this document.
10.2 Look for signs of gasket leakage through the end flanges and
post. If necessary, re-torque end flanges and post cover.
10.3 Examine the valve for damage caused by corrosive fumes or
process drippings.
10.4 Clean the valve and repaint areas of severe oxidation.
10.5 Check packing gland retainer bolting for proper tightness. If there
is a persistent leak that cannot be stopped by tightening of the
gland nuts, replace the packing. (Refer to Disassembly/Assembly
section in this document.)
CAUTION
Do not over tighten packing. This can cause excessive packing
wear and high stem friction that may impede stem movement.
Reference Tables in Appendix A for recommended and maximum
torque values. Do not exceed maximum torque values.
10.6 If possible, stroke the valve — checking for smooth, full stroke
operation. Unsteady stem movement may indicate an internal
valve problem.
10.7 Check the calibration of the positioner/controller if available.
For further preventative maintenance, see the instructions in
the Installation, Operation, and Maintenance manual for the
applicable positioner/controller.
10.8 Ensure all accessories, brackets and bolting are securely fastened.
10.9 If possible, remove power source (air supply/electrical signal) and
observe actuator for correct fail-safe action.
10.10 Check the actuator and all air connections for leaks.
10.11 If an air filter is supplied, check and replace the cartridge if
necessary.