Strahman Bi-Torq BT Series User manual

BT SERIES
THERMAL SHUT-OFF VALVES
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OPERATIONS AND MAINTENANCE MANUAL
Models FL-BT-149X
I. OVERVIEW OF THERMAL SHUT-OFF VALVES
BI-TORQ Valve Automation automatic thermal shut-o valves are designed for ow shuto protection in piping systems
handling ammable gasses or liquids, solvents, toxic uids, or any other potentially dangerous media. These re
control valves terminate ow in the event of re, aiding in reducing re intensity. In the event of re, the fusible link
separates, allowing the top mounted spring pack to drive an API607 re safe rated valve into a closed position. Fusible
links are available in a range of temperature settings. The thermal shut-o valves also are available in a fail open
position, ideal for a sprinkler system in the event of a re.
The thermal shut-o valves you have received has been assembled and tested at our factory with attention to safety
in mind. BI-TORQ Valve Automation uses high quality materials and tested engineering to ensure that this product will
operate safely and reliably. Carefully read all instructions before handling in order to avoid injury to the operator or
damage to the product.
NOTE: Please refer to the attached assembly drawing FL-BT-0600 for parts identication and complete parts list.
II. GENERAL SAFETY INSTRUCTIONS
WARNING: THIS ASSEMBLY WAS SHIPPED FROM THE FACTORY IN THE UNARMED POSITION AND IS READY FOR INSTALLATION
IN LINE. USE EXTREME CAUTION IN HANDLING THE ASSEMBLY BECAUSE THE SPRING PACK IS UNDER FULL TENSION.
NOTE:THE VALVES ARE SHIPPED IN THE CLOSED POSITION.
The unit must be installed in a location with carefully maintained ambient temperatures. Installing the link
in locations where high temperature uctuations are possible (such as direct sunlight) is not recommended. Exposure to
high ambient temperatures can cause the fusible links to break prematurely. (See chart 1 for link temperature ratings.)
9
10
12
11
8
16
15
14
ILLUSTRATION 1.1
all reference numbers
refer to drawing FL-BT-0600
Part Number Yield Temp. Max. Ambient Temp.
314135 135°F/57°F 104°F/41°C
314165 165°F/74°C 135°F/57°C
314212 212°F/100°C 185°F/82°F
314280 280°F/138°C 253°F/123°C
314360 360°F/182°C 330°F/166°C
Series Links per assembly
FL-BT-149X 8
IMAGE OF FUSIBLE LINK
published 2/13/20

BT SERIES
THERMAL SHUT-OFF VALVES
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OPERATIONS AND MAINTENANCE MANUAL
Models FL-BT-149X
III. INSTALLING FUSIBLE LINKS ON THE BT SERIES ASSEMBLY
NOTE:THE VALVES ARE SHIPPED IN THE CLOSED POSITION AND UNARMED AND MUST BE MOVED TO THE OPEN
POSITION AND ARMED TO BE FUNCTIONAL.
FOR NEWLY INSTALLED AND UNARMED ASSEMBLY
REQUIRED TOOLS: 9/16” and 1/2” open-ended wrenches to install nuts (varies with spring pack) NOTE: INSTALL VALVE
IN PIPELINE BEFORE PROCEEDING!
1. Move locking trigger (#12) away from spring pack tripper plate (#11) prior to opening valve.
2. With declutchable manual override gear in the engaged positon, open valve with the handwheel. Turn the declutch
gear handwheel toward the open position (CCW) until it stops. CAUTION: Keep declutch in engaged position.
3. After valve has been opened, swing locking trigger (#12) into position as shown on illustration FL-HT-0600-1.1 on
page 3.
4. Remove hardware on locking trigger ( #12) and secure fusible links to through holes on spring pack arming
device (#7). IMPORTANT: Keep fusible links (#10) straight and in line while attaching to trigger (#12). DO NOT
OVERTIGHTEN.
5. Adjust rod end nuts on retaining rods (#9) until a slight tension on the links is felt. DO NOT OVERTIGHTEN.
6. With declutch engaged, turn declutch handwheel clockwise (CW) until spring tension is held by links. Disengage
declutch mechanism according to instructions on page 4. DO NOT FORCE INTO POSITION. The unit is now armed.
IMPORTANT: THE UNIT IS NOT ARMED UNTIL THE GEAR HAS BEEN PLACED IN THE DISENGAGED POSITION AFTER
INSTALLATION OF LINKS. IF THE GEAR IS LEFT IN THE ENGAGED POSITION THE VALVE WILL NOT SPRING CLOSE.
IV. OPERATION
Once the unit is properly armed, the valve may be operated closed-open in the normal manner using the declutchable
gear handwheel upon removal of the fusible links (reverse “Installation” instructions above). The gear lever must
always be returned to the DISENGAGED position after manually operating the valve and the links must be put back into
place. Failure to return the gear to the disengaged position will lock the gear and valve into position, and the fusible
link assembly will not function properly.
IMPORTANT: THE FUSIBLE LINKS MUST BE RETURNED TO THE ARMED AND INSTALLED POSITION AFTER MANUAL
OPERATION!
PRE-ARMING CHECK LIST
• Is valve installed in line securely?
• Is Declutch gear override in the engaged position? (see page 4)
• Is the valve in the closed position?
If the items in the checklist all can be answered “YES”, proceed with arming the assembly.

BT SERIES
THERMAL SHUT-OFF VALVES
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OPERATIONS AND MAINTENANCE MANUAL
Models FL-BT-149X
V. MAINTENANCE
IMPORTANT: The fusible link manufacturer recommends annual replacement of link(s) as part of a regular maintenance
schedule. Contact your local distributor or BI-TORQ® Valve Automation for replacement links. Order by part number
or temperature rating on old link. Replacement valve seats and seals subject to normal wear are available from your
local distributor or BI-TORQ Valve Automation. The spring case and declutchable gear are lifetime lubricated and do not
require maintenance. Disassembly of the spring case or gear will void any written or verbal warranties.
WARNING: THE SPRING CASE CLOCKSPRING IS ALWAYS UNDER PRESSURE. DO NOT DISASSEMBLE SPRING PACK UNDER ANY
CIRCUMSTANCES. DISASSEMBLY OF THE SPRING PACK COULD RESULT IN SERIOUS INJURY OR DEATH.
ASSEMBLY DRAWING FL-BT-0600
1 valve mounting bracket
2 valve coupler
3declutchable override gear
4 spring pack mounting plate
5 spring pack/declutch coupler
6 spring pack (149, 169, 189)
7 arming device mounting plate
8 adjustable closed stop
9 fusible link retaining rod
10 fusible links
11 spring pack tripper plate
12 locking trigger
13 safety cover plate
14 rod end bearings
15 shoulder bolts
16 SuperLoops
IMPORTANT: IMPROPER INSTALLATION
OR ARMING OF FUSIBLE LINK
ASSEMBLIES WILL VOID WARRANTY,
AS WILL DISASSEMBLY OF THE
PRODUCT WITHOUT PRIOR APPROVAL
FROM FACTORY.
PARTS LIST
IMAGE OF FUSIBLE LINK
FL-BT-0600-1.1
D
I
S
E
N
G
A
G
E
1
2
3
4
5
6
8
7
9
10
13
12
11
DECLUTCH LEVER SHOWN
IN ENGAGED POSITON

BT SERIES
THERMAL SHUT-OFF VALVES
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OPERATIONS AND MAINTENANCE MANUAL
Models FL-BT-149X
VI. OPERATING THE DECLUTCHABLE MANUAL OVERRIDE GEAR
IMPORTANT: Make sure that the fusible links have been removed before attempting to operate the valve with the
declutchable manual override.
Use the following instructions to ENGAGE the declutchable manual override.
1. Using one hand, grab the override engagement handle, squeezing the bottom handle and top handle together.
2. With the handles still squeezed together, rotate the handle from its declutched position upward toward the
spring pack mounting ange until the handle locking tabs are inline with their locking positions.
NOTE: In some cases the override gear teeth will not mesh correctly when rotating the handle upward. If this
occurs, rotate the override handwheel slightly to mesh the gears and then rotate the declutch handle upward.
3. Once the override handle is in its locked position, the override is ready to be used. Clockwise rotation of the
override handwheel will produce clockwise rotation of the override output and valve. Conversely,
counterclockwise rotation of the handwheel will produce counterclockwise rotation of the override output,
and valve.
Use the following instructions to DISENGAGE the declutchable manual override.
Note: When the assembly is rearmed with the fusible links back in place, the the manual override must
be returned to its declutched position. Reversing the procedure above will return the override to the declutched
position. Make sure that the handle locking tabs are inserted into their locking position on the override housing.
Leaving the declutch engaged will prohibit the spring return unit from cycling the valve to the closed position when the
fusible links yield. Leaving the unit in the engaged position will prevent the unit from operating correctly, may cause
damage to the override as well as drivers linkages, etc. and void the override warranty.
IMPORTANT: The fusible links will have to be reinstalled and the declutch disengaged before the assembly is properly
armed.
The picture on the left shows the declutch operator in the disengaged
to allow the spring pack to close the valve when the fusible links yield.
As shown, the handle arrangement is pinned in the down position. The
handwheel should rotate freely in either the clockwise or counterclockwise
directions without aecting the valve rotation.
The picture on the left shows the declutch in the “override” position, or
“engaged,” for operating the valve manually. As shown, the handle ar-
rangement is pinned in the up position for override. Rotation of the hand-
wheel clockwise will rotate valve clockwise (generally closed
direction); rotation of the handwheel counter-clockwise will rotate actua-
tor counterclockwise (generally open).
IMPORTANT: FUSIBLE LINKS MUST BE REMOVED BEFORE ATTEMPTING TO
OPERATE THE VALVE WITH THE DECLUTCH.
DISENGAGED
ENGAGED