Replacing a seal bar element

Repair & Maintenance
Replacing a seal bar element
Dependable, repeatable seals require seal bar elements,
insulators and PTFE covers that are in excellent working
order. These components are heated and cooled over and
over again, and in time, they need replacement. The task of
replacing a seal bar element assembly on a Vertrod impulse
sealer is a fairly straight forward procedure that can be
accomplished in about twenty minutes, once you know how
to do it. Follow these simple instructions and you can
enjoy years of dependable service from your Vertrod sealer.
pacmachinery.com
Replacing a seal bar element
Step 1
Step 2
Step 3
Gather the tools you will need to
Gather the parts and materials you will
Remove the seal bar from the sealer.
replace the seal bar element. The tool
need to replace the seal bar element.
Loosen 2 screws on the wire retaining
list includes a Phillips screwdriver,
Part list includes the seal bar element,
clamp with the Allen wrench. Remove old
a pair of scissors, ruler, needle nose
insulator tape, thermocouple (optional),
element and discard. Remove the end
pliers, a utility knife, and an Allen
Teflon cover tape, and a tube of
block retainer screw and slide off the end
wrench (1/16”)
Audiocone silicone lubricant.
block. Remove the old cover, thermocouple & insulator tape. Clean the seal bar
with alcohol or mineral spirits.
Step 4
Step 5
Step 6
Peel the backing off the new insulator
Trim the tape, fold it over the end.
Using a sharp utility knife, carefully
tape. Starting about a third of the way
Remove any remaining backing and
trim the insulator tape away from any
down the end of the bar, apply the
secure the insulator firmly.
of the openings you may have covered.
tape carefully and firmly, all the way
to the other end.
Replacing a seal bar element
Step 7
Step 8
Step 9
Using a pen, mark a line 3” from the
Position the thermocouple according
Replace the end block, push it in firmly
left end of the seal bar. This is where
to the mark. Center the tip of the
and lock it in place using the Phillips
you will position the thermocouple.
thermocouple at the middle of the retention screw. Once secure, slide the
insulator tape. Thread the thermo-
end of a new copper-coated sealing
couple sending wires into the groove
element under the retaining clip and
just below the top of the bar.
tighten down the two Allen screws.
Step 10
Step 11
Step 12
Repeat the operation on the other end
Measure out a section of the new
Lay the bar on its side and apply the
pulling the wire tight with the needle
Teflon cover tape. Extend approxi-
adhesive strip to the bar. Press firmly.
nose pliers. Holding it firmly, secure
mately 1” beyond the seal bar ends.
The Teflon cover tape must be applied
the two Allen screws.
Cut the tape and remove the backer
smoothly and without wrinkles.
strip on the side farthest from you.
Replacing a seal bar element
Step 13
Step 14
Step 15
Fold over the top of the bar and cover
Trim the ends with the scissors. Apply
Reinstall the refurbished seal bar and
the seal bar element. Remove the
a thin coat of the Audiocone silicone
clear electrical contact guards on the
backing strip, pull the Teflon cover
lubricant to the Teflon cover to protect
Vertrod sealer. Plan for repair and
tape tightly over the top and on to
it and to reduce the possibility of having
maintenance in advance - always
the opposite side. Press the adhesive
the sealing material sticking to the bar.
have extra Vertrod seal bar repair
firmly to complete application.
Reinstall the seal bar.
materials on hand.
PAC Machinery Headquarters
25 Tiburon Street
San Rafael, CA 94901
(415) 454-4868
[email protected]
www.pacmachinery.com
Clamco
775 Brera Industrial Parkway
Berea, OH 44017
(216) 267-1011
[email protected]
Packaging Aids & Vertrod
25 Tiburon Street
San Rafael, CA 94901
(415) 454-4868
[email protected]
[email protected]
Rollbag Systems • Converting Technology
N57W13282 Carmen Avenue
Menomonee Falls, WI 53051
(262) 781-1600
[email protected]