Bray McCANNALOK Series User manual

McCANNALOK SERIES
CRYOGENIC HIGH PERFORMANCE
BUTTERFLY VALVES
Installation, Operation and Maintenance Manual
BRAY.COM THE HIGH PERFORMANCE COMPANY

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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 of 18
1.0 Definition of Terms 3
2.0 Introduction 3
3.0 Parts Diagram 4
4.0 Handling Requirements 5
5.0 Long Term Storage 6
6.0 Installation 7
7.0 Maintenance 8
8.0 Stem Seal Replacement 9
9.0 Seat Replacement 11
10.0 Disc and Stem Replacement 12
11.0 Field Adjustments 15
12.0 Appendix A — Tables 16
TABLE OF CONTENTS
For information on this product and other Bray products, please visit BRAY.COM

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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.
3 of 18
READ AND FOLLOW THESE INSTRUCTIONS CAREFULLY.
SAVE THIS MANUAL FOR LATER USE.
1.0 DEFINITION OF TERMS
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in
death or injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, may result in
injury.
NOTICE
Used without the safety alert symbol, indicates a potential situation which, if not
avoided, may result in an undesirable result or state, including property damage.
2.0 INTRODUCTION
2.1 The McCannalok Cryogenic high performance butterfly valve provides
industry leading cryogenic sealing technology and performance while
being produced to the highest quality standards. The valve is designed
to handle the most difficult medias in today's industrial environments,
liquid oxygen, liquid natural gas, and other cryogenic liquids.
2.2 Features Include:
2.2.1 Tight shutoff provided throughout a wide range of operating conditions.
2.2.2 Suitable for both modulating and on/off services, the McCannalok
Cryogenic butterfly valve is easily automated with your choice of manual
operators, electric and pneumatic actuators, positioners, and controls.
2.3 For additional information about McCannalok Cryogenic butterfly
valves — including application data, engineering specifications and
actuator selection, visit www.bray.com or contact your Bray distributor
or sales representative.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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 of 18
3.0 PARTS DIAGRAM — MCCANNALOK CRYOGENIC VALVE
34
35
23
7
8A
8B
7
6
1
9
3
2
32
5
22
27
15
13
8C
33
12
16
14
18
17
21
20
19
25
24
ITEM
NO. DESCRIPTION
1Body
2Disc
3Stem
5Seat Retainer
6Locating Plug
7A Gasket (Locating Plug)
7B Gasket (Bonnet)
8A Upper Body Bearing
8B Lower Body Bearing
8C Bonnet Bearing
9Disc Spacer
12 Thrust Washer
13 Stem Seal Set
14 Grounding Washer
15 Stud
16 Gland Ring
17 Retaining Ring
18 Gland Retainer
19 Lock Washer
20 Hex Nut
21 Mounting Bracket
22 Socket Head Cap Screw
23 Taper Pin
24 Lock Washer
25 Socket Head Cap Screw
27 Seat Retainer Gasket
32 Seat
33 Bonnet
34 Socket Head Cap Screw
35 Lock Washer

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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 of 18
4.0 HANDLING REQUIREMENTS
4.1 Packed Valves
4.1.1 Crates: Lifting and handling of the packed valves in crates shall be
carried out by a fork lift truck, by means of the appropriate fork hitches.
4.1.2 Cases: The lifting of packed valves in cases shall 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.
4.2 Unpacked Valves
4.2.1 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.
4.2.2 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 valve handling and/or lifting, the lifting equipment (fasteners, hooks, etc.)
must be sized and selected while taking into account the valve weight indicated
in our packing list and/or delivery note. Lifting and handling must be made only
by qualified personnel.
Fasteners must be protected by plastic covers in sharp corner areas.
Caution must be taken during the handling to avoid this equipment passing
over workers or over any other place where a possible fall could cause injury or
damage. In any case, local safety regulations must be respected

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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 of 18
5.0 LONG TERM STORAGE
5.1 McCannalok Cryogenic valves are cleaned and double bagged to form
a vapor barrier with desiccant bags to prevent moisture from collecting
on the valve. If the valves are to be stored before installation, storage
must be carried out in a controlled manner as follows:
5.1.1 Valves must be stored in a closed, clean and dry environment.
5.1.2 Valve disc to be in closed position and the body end faces must be
covered with appropriate flange protection. Flange protectors should
only be removed at the time of installation.
5.1.3 If the valve is automated for fail open service, the valve shall be
carefully protected to ensure there is no damage to the sealing
surfaces.
5.1.4 Valves should be stored indoors with a preferred temperature range
from 40°F (4°C) to 85°F (29°C).
5.1.5 The valves should be checked every three months to ensure the above
conditions are maintained.
5.1.6 If the valve vapor barrier bags are broken or compromised in any way,
valve shall be evaluated to determine if cleaning is necessary. Any dirt
or debris can prevent the valve from functioning properly.
WARNING
If valve is for oxygen service and the vapor barrier bags are compromised, the
valve must be disassembled and re-cleaned using approved oxygen cleaning
procedures before installation.
5.2 These are general guidelines for valve storage. Please consult the
factory for information regarding specific requirements.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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 of 18
6.0 INSTALLATION
6.1 The McCannalok Cryogenic valve is designed to be mounted between
ANSI flanges. When the valve is open, the disc will extend into the pipe
on both sides of the valve (the disc extends further on the body side
than the seat retainer side of the valve). Piping must be large enough to
allow the disc to clear the pipe.
6.2 In general, Class 150 valves will clear Schedule 40 pipe, and Class 300
valves will clear Schedule 80 pipe adequately.
CAUTION
If handle or actuator has been removed do not rotate disc beyond full open or
closed position — this could cause damage to sealing surfaces.
6.3 NOTE: McCannalok valves are equipped with travel limiters to prevent
over closure. The valve is opened by turning counterclockwise, closed
by turning clockwise. The double “D” flats or keyway at the top of the
stem is parallel to the disc edge.
CAUTION
Verify and check the preferred flow direction prior to installation.
6.4 The McCannalok Cryogenic valve’s installation orientation is with the
seat retainer downstream. This will enable positive shutoff and a long
service life.
6.5 Ensure the disc (2) is in the closed position then carefully center the
valve between flanges. The valve guide holes (wafer pattern valve) or
tapped holes (lug pattern valve) should be used to align the valve with
the mating flanges.
6.6 Use flange gasket manufacturer’s recommended torques when bolting
valve into the line.
6.7 Gaskets should conform to the requirements of API Standard 601,
Edition 3 for ASME/ANSI B16.5 class flanges. Spiral wound gaskets,
such as Flexitallic CGl series, conforming to ASME/ANSI B16.20 are
acceptable.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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 of 18
7.0 MAINTENANCE
7.1 Reasonable precautions should be taken before beginning work on the
valve. Protective clothing, as required by the specific line fluid, should
be worn. If the valve was removed from cryogenic service, allow plenty
of time for it to warm up to a safe temperature.
WARNING
Before removing handle or the actuator from the valve, or before removing seat
retainer from a valve in dead end service, close the valve and depressurize the line.
7.2 The eccentric design of the McCannalok valve may allow line pressure
to open the valve if the handle/actuator is not in place while the valve is
under pressure.
WARNING
Do not pressurize the line without a handle or actuator on the valve.
7.3 The McCannalok valve must be in the closed position to be removed
from the line.
7.4 Begin all work on a valve that has been removed from service by
cleaning the valve, removing any grit or scale.
CAUTION
When handling the valve, care should be taken not to scratch the disc edge or seat.
7.5 Replacement seats, seals and other parts are available from authorized
distributors. Contact your distributor or sales representative for details
of price and delivery.
WARNING
Verify if the valves are required to be cleaned for oxygen service. Depending on
the application, the valves may need to be cleaned and assembled at a qualified
oxygen cleaning facility.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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 of 18
8.0 STEM SEAL REPLACEMENT
8.1 Refer to McCannalok Cryogenic parts diagram for parts identification.
NOTICE
Note actuation assembly position before removal.
8.2 For handle operated valves, remove handle assembly. Remove socket
head cap screws (25) and lock washers (24). Remove mounting bracket
(21). For actuated valves, unbolt mounting bracket (21) from bonnet
(33) and lift actuator assembly off stem (3).
8.3 Remove gland retainer nuts (20) and lock washers (19). Remove gland
retainer (18) anti-blowout retaining ring or split ring (17) (depending on
size), gland ring (16), and grounding washer (14).
CAUTION
When removing stem seals, care should be taken not to scratch stem (3) or
packing box bore.
8.4 Remove stem seals (13).
8.5 Do not remove thrust washer (12), unless further valve disassembly is
required.
8.6 Examine body packing box bore and stem (3), clean as necessary to
remove any corrosion or foreign matter before installing new seals.
8.7 Install new seals (13) in packing box one at a time. Stagger seal ring
joints 180° apart when installing. Tamp each ring to bottom before
installing next ring. Table 3 shows the correct number of stem seals to
install in each valve.
NOTICE
On the larger valves it will be necessary to compress each seal before adding the
next.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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 of 18
8.8 Install grounding washer (14) on top of the stem seals (13) with the tines
facing down.
8.9 Slide gland ring (16) over stem (3) on top of grounding washer (14).
Install anti-blowout retaining ring or split ring (17) (depending on valve
size). Slide gland retainer (18) over stem (3) and onto gland studs (15).
Place lock washers (19) and hex nuts (20) on studs (15) and tighten
finger tight.
8.10 Remount actuator assembly with lock washers (24) and mounting
bracket cap screws (25). Tighten mounting bracket cap screws (25) to
the correct torque per Table 6. If required, remount handle assembly.
Ensure handle or actuator is mounted in the original orientation.
8.11 Operate valve open and closed several times to check for binding and
to set the stem seals. Loosen gland nuts (20) and retighten to torque
value given in Table 4 .

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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.
11 of 18
9.0 SEAT REPLACEMENT
9.1 Refer to McCannalok Cryogenic parts diagram for parts identification.
With the disc (2) in the closed position, remove the valve from service.
9.2 Lay the valve down with the disc (2) in the closed position and the seat
retainer (5) side facing up.
9.3 Remove the socket head cap screws (22), the seat retainer (5), seat
retainer gasket (27) and seat (32).
9.4 Carefully clean the seat (32) area in the body (1) and seat retainer (5).
Remove foreign matter, dirt, oil, etc. Check disc seating area for nicks or
scratches.
9.5 With the disc (2) in the CLOSED position, place the new seat (32) on
disc (2), carefully centering it on the disc (2).
9.6 Install the new seat retainer gasket (27) centered onto the body (1).
9.7 Align the holes in the seat retainer (5) with matching holes in body (1)
and carefully place in position on top of seat (32). Make sure that the
seat (32) remains centered on the disc (2) and the seat retainer gasket
(22) remains centered on the body (1) when positioning seat retainer
(5). The seat retainer bolt counterbores must be facing away from the
face of the body.
CAUTION
Do not shift the retainer in order to align holes. It may shift the seat or seat
retainer gasket from its correct position.
9.9 Apply to the thread of the socket head cap screws GPL225 Krytox
PTFE thread lubricant.
9.9.1 Install the socket head cap screws (22) finger tight to the body (1)
through the seat retainer counter bores.
9.9.2 Tighten the cap screws (22) to approximately 30% of the torque value
listed in Table 4 in a crisscross pattern.
9.9.3 Repeat Step 2, increasing the torque value to approximately 60% of the
final torque value.
9.9.4 Repeat Step 3, increasing the torque value to the final required torque
value.
9.9.5 Open the disc (2). Re-torque all cap screws (22) to the final required
torque value.
9.10 A final tightening should be checked prior to installation. Operate valve
several times and examine seat for any damage before reinstalling the
valve in service.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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.
12 of 18
10.0 DISC AND STEM REPLACEMENT
10.1 Refer to McCannalok Cryogenic parts diagram for parts identification.
NOTICE
Stem (3) and disc (2) are supplied as a matched set with taper pins (23) and are
to be replaced as a set.
10.2 For handle-operated valves remove handle assembly. Remove socket
head cap screws (25) and lock washers (24). Remove mounting bracket
(21). For actuated valves, unbolt mounting bracket (21) from bonnet
(33) and lift actuator assembly off stem (3).
NOTICE
Note actuation assembly position before removal.
10.3 Remove gland retainer nuts (20) and lock washers (19). Remove gland
retainer (18), anti-blowout retaining ring or split ring (17) (depending on
valve size), gland ring (16), and grounding washer (14).
10.4 Remove stem seals (13).
CAUTION
Take care not to scratch stem (3) or body packing box bore.
10.5 Remove locating plug (6) and gasket (7A).
10.6 Remove cap screws (22), seat retainer (5),seat retainer gasket (27) and
seat (32).
10.7 Turn disc (2) to the full open position and drill out tack welds on large
end of taper pins (23).
CAUTION
Take care to support valve so that disc (2) surfaces are not damaged.
10.8 Drill sizes to remove tack welds as given in Table 5. Use center-punch to
dimple center of tack welds prior to drilling.
10.9 Place valve in horizontal position, with flat face of disc (2) up. Support
disc (2) and body (1) on wooden blocks to protect disc (2) and body (1)
surfaces. Disc (2) will rest in partially open position.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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.
13 of 18
10.10 Knock out taper pins (23) using a rod or punch on small end of pin
(opposite tack weld). It may be necessary to lift body (1) and rotate
disc (2) slightly to do this. Make sure disc (2) is resting on wood blocks
since it will swing freely on stem (3) with pins removed. When taper
pins (23) are out, lay body (1) down so disc (2) and body (1) are evenly
supported on flat surface.
10.11 Using a brass bar or drift punch, knock stem (3) loose from bottom of
valve and pull from bonnet (33). After long or severe service this may
take considerable force.
CAUTION
Be careful not to damage bearings (8), disc spacers (9), body (1) or bonnet (33).
10.12 Disc spacers (9) are used at top and bottom of disc (2) to properly
position disc (2) in body (1). Proper spacers were selected at initial
assembly and rarely require replacement. The location of these spacers
should be noted, and the spacers marked at disassembly so that they
are reinstalled in the same positions, top and bottom.
10.13 Separate body (1) from disc (2), and remove thrust washer (12) from
packing bore.
10.14 Examine body bearings (8A/8B) for excessive wear. Two body bearings
are located in the body (1) near the disc spacers (9), one stem bearing
is located in the bonnet (33) below the thrust washer (12). If removed
from body (1) or bonnet (33), note position of stem bearing and mark
to reinstall in same location. If bearing liner is worn through to the shell,
or if severe damage is evident on the bearing, it should be replaced.
Replacement is rarely needed.
10.15 Clean body (1) and bonnet (33) thoroughly to remove all dirt, foreign
matter, rust, etc.
WARNING
If this valve is to be reinstalled into a oxygen cleaned service, the cleaning and
reassembly of this product needs to occur in a clean room environment via
approved procedure.
10.16 Place the body (1) flat, seat retainer side facing down, and support it
on wooden blocks sufficiently above the work surface as to facilitate
insertion of the disc (2) in open position. Assemble disc spacers (9) into
each stem hole counterbore on ID of body (1). Lower the disc (2) into
position, aligning the bores in body (1) and disc (2).
10.17 Insert new stem (3) in the bonnet (33), through the body (1),
bearings (8), disc spacers (9), and disc (2).

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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.
14 of 18
10.18 Align taper pin holes in disc (2) and stem (3), and install taper pins (23).
Drive pins in tightly with rod or punch until large end of taper pins (23)
sit below disc (2) surface. Tack weld each pin (23) to disc (2) at large
end of pin.
10.19 Install new gasket (7A) on locating plug (6), apply approved thread
lubricant to locating plug (6) threads, and install locating plug in body
(1). Tighten locating plug to the proper torque value given in Table 6.
10.20 Install new stem seals (13), following instructions in “Stem Seal
Replacement” Section 8.
10.21 Install new seat (32), following instructions in “Seat Replacement”
Section 9.
10.22 Remount handle or actuator assembly, and operate valve several times
to verify proper operation. Examine disc (2) and seat for any damage
before reinstalling in line.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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.
15 of 18
11.0 FIELD ADJUSTMENTS
11.1 Stem Seal Leakage
11.1.1 Should leakage occur at the stem seals, it may be stopped by
retightening the gland retainer nuts to the values specified in Table 4.
NOTICE
Do not overtighten gland nuts, as this may cause increased operating torque and
improper valve operation or closure.
11.1.2 If the leakage cannot be stopped by this action, the stem seals require
replacement.
11.2 Adjusting Valve Closure
11.2.1 Valves with gear actuators or electric/pneumatic actuators may require
adjustment of the travel stops in the actuator to properly close the
valve for tight shut off. The following procedure should be followed
to set travel or limit stops. (It is recommended that the valve must be
removed from line for this procedure.)
NOTICE
The valve has a positive travel stop to ensure valve disc (2) cannot be over
closed.
11.2.2 Loosen the “close actuator” stop screw completely to permit proper disc
(2) positioning. Close the valve until the disc (2) touches the valve body
(1) positive travel stop. Adjust and lock down the close actuator stop
screw while the disc (2) is in this position. Open and close the valve to
visually check that the valve opens and closes to the correct position.
11.2.3 The valve disc (2) is at the full open position when the disc (2) is
perpendicular to the body (1). Set the “open” actuator stop for this
position.
CAUTION
Do not allow the valve to over-open as this may damage the disc seating surfaces
by hitting body (1) or attached piping.
11.2.4 For other power actuators, consult the manufacturer’s instructions for
setting travel stops, as these vary with actuator model and type.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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.
16 of 18
Table 1: NOMINAL INSIDE DIAMETER OF PIPE
(inches)
Valve Size Schedule
NPS 40 80
33.07 2.90
44.03 3.83
66.07 5.76
8 7.98 7.63
10 10.02 9.56
12 11.94 11.38
Table 1: NOMINAL INSIDE DIAMETER OF PIPE
(mm)
Valve Size Schedule
DN 40 80
80 78 74
100 102 97
150 154 146
200 203 194
250 255 243
300 303 289
Table 2: MINIMUM INSIDE DIAMETER OF PIPE WITH THE
RECOMMENDED CLEARANCE (inches)
Valve Size Class
NPS 150 300
3 2.86 2.86
43.72 3.72
6 5.88 5.75
8 7.80 7.56
10 9.78 9.44
12 11.74 11.31
Table 2: MINIMUM INSIDE DIAMETER OF PIPE WITH THE
RECOMMENDED CLEARANCE (mm)
Valve Size Class
DN 150 300
80 73 73
100 94 94
150 149 146
200 198 192
250 248 240
300 298 287
Table 3: TOTAL NUMBER OF STEM SEALS
Valve Size Class
NPS DN 150/300
3 80 4
4 100 4
6 150 4
8 200 5
10 250 5
12 300 5
12.0 APPENDIX A - TABLES
NOTES:
1. Minimum I.D. of pipe with recommended clearances (per API 609) have been calculated by adding the minimum I.D. with
zero clearance to a minimum recommended diametric clearance for each pipe size.
2. These tables assume that the pipe is on the body side of the valve and that the pipe is perfectly centered. The seat
retainer side of the valve will always have more clearance than the body side.
3. A minimum of 1/16" thick gasket is used between the pipe flange and valve body face.
4. When using a pipe whose I.D. is smaller than the recommended minimum inside diameter of pipe with adequate clearance,
a chamfer of 45° should be provided on the end of the pipe so that it clears the disc.

McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
© 2020 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.
17 of 18
McCANNALOK CRYOGENIC VALVE
Installation, Operation and Maintenance Manual
Table 4: GLAND RETAINER NUT AND SEAT RETAINER
SCREW TORQUES (Lb-in)
Valve Size Gland Nut Seat Retainer Screws
NPS 150 300 150 300
3 60 60 100 100
4 60 60 175 175
6 80 120 100 175
8 80 140 175 175
10 110 190 175 300
12 130 220 300 300
Table 6: LOCATING PLUG AND MOUNTING BRACKET CAP
SCREW TORQUE (Lb-in)
Valve Size Locating Plug Mounting Bracket Cap Screws
NPS 150 & 300 150 300
3 2520 175 175
4 2520 175 175
62700 300 300
8 3000 300 756
10 4200 756 756
12 4200 756 756
Table 4: GLAND RETAINER NUT AND SEAT RETAINER
SCREW TORQUES (Nm)
Valve Size Gland Nut Seat Retainer Screws
DN 150 300 150 300
80 7 7 11 11
100 7 7 20 20
150 9 14 11 20
200 9 16 20 20
250 12 21 20 34
300 15 25 34 34
Table 6: LOCATING PLUG AND MOUNTING BRACKET CAP
SCREW TORQUE (Nm)
Valve Size Locating Plug Mounting Bracket Cap Screws
DN 150 & 300 150 300
80 285 20 20
100 285 20 20
150 305 34 34
200 339 34 85
250 475 85 85
300 475 85 85
Table 5: DRILL SIZE TO REMOVE TACK WELD
(inches)
Valve Size Class
NPS 150 300
3 .234 15/64 .234 15/64
4 .234 15/64 .234 15/64
6 .234 15/64 .234 15/64
8 .234 15/64 .234 15/64
10 .234 15/64 .234 15/64
12 .234 15/64 .234 15/64
Table 5: DRILL SIZE TO REMOVE TACK WELD
(mm)
Valve Size Class
DN 150 300
80 6 6
100 6 6
150 6 6
200 6 6
250 6 6
300 6 6

HEADQUARTERS
Bray International, Inc.
13333 Westland East Blvd.
Houston, Texas 77041
Tel: [phone]
All statements, technical information, and recommendations in this bulletin are for general
use only. Consult Bray representatives or factory for the specific requirements and material
selection for your intended application. The right to change or modify product design or product
without prior notice is reserved. Patents issued and applied for worldwide.
Bray®is a registered trademark of Bray International, Inc.
© 2020 BRAY INTERNATIONAL. ALL RIGHTS RESERVED. BRAY.COM
SINCE 1986, BRAY HAS PROVIDED FLOW CONTROL SOLUTIONS
FOR A VARIETY OF INDUSTRIES AROUND THE WORLD.
VISIT BRAY.COM TO LEARN MORE ABOUT
BRAY PRODUCTS AND LOCATIONS NEAR YOU.
IOM_1054_EL_S4X_CRYO_2020_12
THE HIGH PERFORMANCE COMPANY BRAY.COM