MANN+HUMMEL TRIDIM Tri-Lock BG Manual

Tri-Lock™ BG/BF
Operation &
Maintenance
Manual

2TRI-DIM TRI-LOCK OPERATION AND MAINTENANCE
Tri-Lock BG/BF
Operation & Maintenance
CONTENTS
Manufacturer’s Message 3
Introduction 4
Fluid Seal 5
Gasket Seal 6
Filter Elements Care and Housing Installation 7
Start-Up Procedures 8
Appendix A – Operating Conditions 14
Appendix B – Locking Tray 15

TRI-LOCK OPERATION AND MAINTENANCE TRI-DIM 3
Manufacturer’s
Message
Tri-Lock BG/BF bag-in/bag-out contamination
filter housings are designed to protect
facility personnel and the general public
from dangerous materials by filtering those
materials. The filters that you are to change
contain the filtered material. In order for you
to be protected as fully as possible, you must
follow these instructions as amended by
your chief safety ocer. The bagging
method of changing a filter is not foolproof,
but it is the safest practical method available
for changing contaminated filters.
We realize that a single manual cannot
address all types of housing designs and
configurations, so we are oering the
concepts of installing a new filter(s) into a
new system and replacing dirty filters in
systems that are already in operation. Once
the concept is understood, both maintenance
personnel and safety personnel can adapt
the most suitable method to use considering
the housing, location, type of filter, and any
other items that can aect safety.
Carefully study this manual and the safety
ocer’s amendments so that you have the
entire procedure in mind before attempting
filter change out. Be sure to have all tools
and equipment on hand prior to actually
beginning work. In this manual, we describe
the Tri-Dim Filter Corporation banding
method of sealing the bag.
The important thing to remember is to use
this manual, your safety ocer’s instructions,
and your own reasoning ability to prevent
yourself and the immediate environment
from being contaminated with the material
that is captured on the dirty filter.

4TRI-DIM TRI-LOCK OPERATION AND MAINTENANCE
ABOUT THE PRODUCT
Tri-Dim’s line of Tri-Lock BG/BF bag-in/bag-out filter housings for
fluid or gasket seal primary filters are side loading filter housings
which have been designed to meet the air filtration needs of
industries and research facilities that handle dangerous, toxic,
biological or carcinogenic material. To minimize exposure to this
harmful contamination while replacing and handling dirty filters, the
housing incorporates a ribbed bag-in/bag-out ring over which a
heavy-duty plastic bag is attached (see picture below).
Once the initial filters are installed and the first bag attached, all
filters – both dirty and new, are handled through the bag using the
procedures described in detail throughout this manual. Depending
upon the user’s requirements, the housing may have an assortment
of filter arrangements, including prefilters, HEPA filters and other
type filter media. No matter what types of filters are contained
within the housing, the filter change out procedure is the same.
Note: Filter change out is incomplete unless the new filters have
been sealed to the housing frame and an in-place leak test has been
performed.
Tri-Lock BG/BF
Introduction

TRI-LOCK OPERATION AND MAINTENANCE TRI-DIM 5
FLUID SEAL DESIGN CONCEPT
The filter to housing gel seal is eected by means of a continuous
knife-edge on the interior of the housing, which mates into the gel
filled perimeter channel on the face of the filter. To eect the seal,
the locking mechanism forces the filter against the knife-edge. The
knife-edge penetrates the gel and a uniform seal is produced on the
filter face.
DESCRIPTION OF FLUID SEAL FILTER LOCKING
SYSTEM
The fluid seal Tri-Lock BF bag-in/bag-out housing has a filter-locking
arm in each tier to operate the replaceable filter locking mechanism.
By operating the internal filter-locking arm inside the PVC bag and
access door, the filter is engaged on, or disengaged from, the
housing knifeedge (internal sealing frame). The filter-locking arm
and the access door interface in such a manner that minimizes the
possibility of the door being closed until the filters are correctly
sealed in the housing and sealed to the mounting frame.
Tri-Lock BG/BF
Fluid Seal

6TRI-DIM TRI-LOCK OPERATION AND MAINTENANCE
Tri-Lock BG/BF
Gasket Seal
GASKET SEAL DESIGN CONCEPT
The filter to housing gasket seal is eected by means of a continuous
flat mounting surface on the interior of the housing, which mates to
a perimeter gasket on the filter. To aect the seal, the locking
mechanism forces the filter against the mounting surface.
OPENING AND CLOSING GASKET-SEAL LOCKING
MECHANISM
By turning the drive bolt(s) clockwise (located at the front exterior
of the housing), independent pressure bars with preloaded springs,
(located in the filter locking mechanism), force the filter against the
interior-mounting frame (there are two drive bolts per filter).
Preloaded springs on each pressure bar, for each filter element,
apply consistent pressure to maintain filter seal. The applied force
has a minimum clamping load of 1,400 pounds per perimeter of the
filter. This force should be applied as an even, uniform load along the
top and bottom of each filter frame. The gasket shall be compressed
to and not exceed 1/8.”
Caution: Over compression of the gasket can lead to leaks.
The standard locking mechanism hardware is 18-8 stainless
steel with a 360 brass nut.

TRI-LOCK OPERATION AND MAINTENANCE TRI-DIM 7
Filter Elements Care
And Housing Installation
HANDLING AND STORAGE OF FILTER ELEMENTS
Particulate filters include a wide range of filter types, sizes and
performance capabilities. These filters are designed to remove
airborne particulate from an air stream. Filters can consist of 30%
ecient (by ASHRAE Standard 52.1-1992) prefilters and up to
99.9995% ecient HEPA (high eciency particulate air) filters. In
general, all particulate air filters are fragile and should be handled
with care. The following precautions should be observed upon
storing filters:
Store in a clean low humidity air controlled environment.
Filter should remain in its original shipping container with correct
orientation until put in use.
Temperature in storage area shall not be less than 0 °F or more
than 100 °F.
Stacking of filters is prohibited.
Moving of filters should be restricted – for fear that the media will
become damaged.
Shelf life is no more than three years for both gasket and gel seal
filters. (see manufacturer’s instructions)
All filter manufacturer’s instructions and warnings shall be
followed as well.
INSTALLATION OF NEW HOUSINGS
1. Position the housing adjacent to the ductwork. Housing should
be welded, bolted or gasketed permanently to the ductwork.
2. Housing should be securely mounted to either a base or other
permanent edifice.
3. Unit should be orientated as so the access door(s) can be easily
removed and replaced.
4. Following installation, ductwork and housing should be cleaned
to eliminate any and all contaminants as well as any other items,
which may have been stored in the unit during shipping.
5. Install filter(s).
6. Install PVC Bag(s) on Bagging Ring before door is installed.
7. Perform designated leak test/DOP test (designated by either the
chief safety ocer or engineer) to insure that the unit is working
properly and is not leaking.

8TRI-DIM TRI-LOCK OPERATION AND MAINTENANCE
BEFORE YOU BEGIN
System must be shutdown prior to any filter installation or
removal. Airflow should be stopped or a bypass of the air system
must be made. Any leakage through either the dampers or other
airflow device will cause bag to suck tight against filter(s) and
possibly cause damage to the bag.
Consult with safety ocer and perform both a job safety analysis
prior to installing or removing any filter(s)and make sure all
personnel are wearing the required personal protective
equipment (PPE).
START-UP PROCEDURE
1. Clean outside door, work area and all stainless steel surfaces.
Fig. 6: 1H x 1W unit with prefilter section
Tri-Lock BG/BF
Getting Started

TRI-LOCK OPERATION AND MAINTENANCE TRI-DIM 9
2. Provide Filter: Provide a new HEPA filter(s) and or prefilter for
each tier.
Fig. 7: Filter insertion
Fig. 8: Worker with PPE
3. Provide Filter Support Shelf: A factory supplied support shelf
should be located immediately outside of and a few inches
below the door of the tier to rest the HEPA filter.
4. Provide Bag: Provide one new factory specified PVC bag for
each filter tier. Always inspect bag for rips and tears before
using.
Fig. 9: Note elastic bag strap is placed inside second rib
5. Provide Sealer: A factory supplied banding kit should be used to
tie o the PVC bag. Further, the safety strap should be cinched
as so it lies flat against the sealing lip between the two humps.
Fig. 10: Safety strap location between the two ribs
Start-Up Procedure
(Continued)

10 TRI-DIM TRI-LOCK OPERATION AND MAINTENANCE
6. Remove Door: Loosen all doorknobs on the section that the
filter(s) are to be removed. Place door(s) in a safe location.
Fig. 11: Note bag safety strap and cinch strap)
Fig. 12: There are at least four doorknobs per door-2H unit shown
7. Remove Cinching Strap and Open up Bag: (make sure that the
safety strap remains on the bag out port)
Fig. 13: Cinch strap in center
Start-Up Procedure
(Continued)

TRI-LOCK OPERATION AND MAINTENANCE TRI-DIM 11
8. Unseal The Filter: Using the mittens, which are incorporated into
the bag, release the filter-locking latch. For a fluid seal housing,
press the arm firmly inward toward the filter at a point near the
latch to relieve the tension and the latch will automatically
spring to one side releasing the arm. Next pull the arm all the
way outward to the open position. This allows the filter to
release from the knife-edge
Fig. 14: Bag is resting on a parallel flat surface and not the floor
For a gasket seal housing, unlock filter by turning both bolt locking
mechanisms counterclockwise with a ratchet. This will release the
filter from the flat edge.
Fig. 15: Bag not shown for visualization eect
9. Use filter retrieval rod to latch onto and pull filter into the PVC
bag. One can also reach into unit and pull filter out on a one
wide unit. Slide the filter as far into the bag as possible. A
residual bag stub from previous filter changes may exist. This
should be removed along with the filter.
Fig. 16: Residual filter bag stubs of both prefilter and HEPA filter
Fig. 17: Hand within mittens shown
Start-Up Procedure
(Continued)

12 TRI-DIM TRI-LOCK OPERATION AND MAINTENANCE
Start-Up Procedure
(Continued)
10. Seal the bag - cinch the bag twice with metal bands between
the removed filter and the housing. Cinch(es) are provided in
the banding kit. If factory approved tape is used, then twist the
bag and tightly tape a six-inch section.
11. Cut the bag between the two cinches. (Approximately ¼”to½”
apart). One cinch will remain with the removed filter and the
other will be sealing o the housing. If tape is used, cut in the
middle of the taped o section and immediately retape the
exposed stubs.
Fig. 18: Top view of both a prefilter and HEPA filter change
out-sealing lip in blue
If your housing has multiple filters per tier, repeat steps
9 – 11 until all filters are removed.
12. Remove bag(s) with dirty filter(s) and dispose of in accordance
with all applicable state and federal laws.
13. Remove safety strap from the sealing lip and slide the shock
cord of the bag from the inside rib to the center of the bag-
bagging ring between the two ribs.
Fig. 19: Bag cords on sealing lip-profile, sealing lip in blue

TRI-LOCK OPERATION AND MAINTENANCE TRI-DIM 13
Start-Up Procedure
(Continued)
14. Place new filter in a new PVC bag. Note- only the frame of the
filter should be touched. Locate the new bag’s shock cord
around the bag out port on the inside rib (where the previous
bag was located). Make sure the stub from the previous bag is
within the new bag.
15. Tighten safety strap on the new bag until it is immobilized and
cannot move. (See Figure 10)
16. Pull old bag and stub into the new PVC bag and away from the
new filter.
17. Slide Filter(s) into housing and engage locking mechanism to
seal o filter(s) on knife edge(s).
18. Close swing bar and latch for a gel seal filter or screw down
drive bolts clockwise on a gasket seal filter.
19. Cinch bag as so it is taut across the surface of the sealing lip.
Caution: do not cinch bag so tight as to cause the shock cord
to slip o of the sealing lip. (See Figure 13)
20. Roll bag up-replace the door and tighten all door latches.
Fig. 20

14 TRI-DIM TRI-LOCK OPERATION AND MAINTENANCE
Appendix A
Operating Conditions
APPENDIX A
It is recommended that the buyer supply complete information
about the operating conditions of the ventilation system prior to
installation of any bag-in/bag-out contamination system. Location
specific conditions may prevent the system from operating
satisfactorily for certain applications. Any non-factory alterations to
the product may result in a compromised installation. Please contact
manufacturer for any questions not addressed in this manual.
Tri-Dim Filter Corporation
PO Box 466
93 Industrial Drive
Louisa, VA 23093
Tel: [phone]
Fax: [phone]
[e-mail]

TRI-LOCK OPERATION AND MAINTENANCE TRI-DIM 15
Appendix B
Locking Tray
LOCKING TRAY CHANGE OUT
It is advised that any locking tray mechanism replacement or
change out be done in a decontaminated environment. Due to
sharp edges, placing a metal locking tray in a PVC bag is not
recommended. However, one of the advantages of the Tri-Lock
BG/BF bag-in/bag-out contamination housing is the ability to
change out locking trays in the field.
Change out is a simple task. The same concept applies to locking
mechanisms as that to filters (refer back to start up procedures).
First, remove all filters from the contamination unit following the
Start Up Procedures aforementioned. Insert a new bag with a
standard ratchet with a ½” socket in the bag. For Gel seal units a
3/8” socket will be needed as well. Position the new PVC bag’s
shock cord the same way you would for a PVC bag with a new filter
in it. Remove the old bag stub in the new bag.
FLUID SEAL METHOD
1. Using the ratchet with the ½” socket remove the two hex nuts
and washers for both the top and bottom locking trays.
2. Then switch to the 3/8” socket and remove the hex nut and
washers from the linkage to the door swing arm.
3. Remove both the top and bottom parts to each pair of locking
trays and pull into the PVC bag.
4. Treat the locking mechanism as a dirty filter and continue the
appropriate steps.
Warning! Ratchet and socket must remain in the bag.
Do not remove.
GASKET SEAL METHOD
1. Using the ratchet with the ½” socket remove the two hex nuts
and washers for both the top and bottom locking trays.
Fig. 21: Downstream view of locking tray mechanism
2. Lift the top half of each locking tray o of the studs and into
the bag.
3. Remove the pipe bearings from the locking mechanism and
back o the drive bolts to release the bottom locking trays.
4. Remove the bottom-locking tray and pull into the PVC bag.
5. Treat the locking mechanism as a dirty filter and continue the
appropriate steps.
Warning! Ratchet and socket must remain in the bag.
Do not remove.

tridim.com
mann-hummel.com
Tel: [phone]
[e-mail]
LOCAL REPRESENTATIVE
Tri-Dim Filter Corporation is committed to continual product
development – all descriptions, specifications and performance
data are subject to change without notice. Tri-Dim products are
manufactured to exacting criteria – there can be a ±5% variance
in filter performance.
2500-10 0521 © MANN+HUMMEL GmbH