BT SERIES
THERMAL SHUT-OFF VALVES
OPERATIONS AND MAINTENANCE MANUAL
Models FL-BT-149,167X, 157,167, and 187 (Quick Link & DT Gear Version)
WWW.BITORQ.COM
Page 2 of 5
3/4/2020
III. ARMING THE BT SERIES ASSEMBLY
NOTE: ALL UNITS ARE SHIPPED IN THE CLOSED/SHUT POSITION WITH DECLUTCH GEAR OVERRIDE ENGAGED.
REQUIRED TOOLS: 9/16” open-ended wrench to install nuts (varies with spring pack) NOTE: INSTALL VALVE IN PIPELINE
BEFORE PROCEEDING!
Note: If you are installing this for the first time, you will need to attach the handwheel to the declutch gear operator
after installing the assembly in the pipeline.
1. Remove link block (#7) with fusible links attached from the top of the assembly using a 9/16” wrench.
2. Turn the declutch gear handwheel toward the fully open position (CCW) until the handwheel stops. The valve is
now in the open position.
3. Move trigger (#8) toward link block post
4. Place link block over link post and free end of fusible links over link studs on trigger (#8)
5. Add link post screw and washers
6. Rotate handwheel clockwise (CW) approximately 1 to 2 turns until links hold spring tension.
NOTE: DO NOT OVER
TIGHTEN AS THIS MAY DAMAGE LINKS
7. Depress declutch lever button and move declutch lever into the disengaged position.
THE LINKS ARE NOW HOLDING THE SPRING AND THE HANDWHEEL WILL SPIN FREELY - THE UNIT IS NOW ARMED
.
IV. CLOSING THE ASSEMBLY MANUALLY
1. Depress declutch lever button and move it to the engaged position (movement of handwheel maybe necessary to
mesh internal gears of declutch to do this).
NEVER FORCE INTO POSITION.
2. Rotate handwheel counter clockwise(CCW) until it stops.
3. Remove link block (#7) with fusible links attached from the top of the assembly using a 9/16” wrench.
THE VALVE CAN NOW BE SHUT BY TURNING THE HANDWHEEL CLOCKWISE (CW) UNTIL IT STOPS.
REFER TO THE ARMING INSTRUCTIONS ABOVE TO REARM THE ASSEMBLY.
IV. LINK REPLACEMENT
1. Depress declutch lever button and move it to the engaged position (movement of handwheel maybe necessary to
mesh internal gears of declutch to this).
NEVER FORCE INTO POSITION.
2. Rotate handwheel counter clockwise(CCW) until it stops.
3. Remove link block (#7) with fusible links attached from the top of the assembly using a 9/16” wrench.
4. Replace links in same configuration as original setup.
5. Finger tighten links to link block (do not over tighten links to block as it may damage them)
6. Place link block over link post and free end of fusible links over link studs on trigger (#8)
7. Add link post screw and washers
REFER TO THE ARMING INSTRUCTIONS ABOVE TO REARM THE ASSEMBLY.
