FORM 100.10-NOM2
57
YORK INTERNATIONAL
FIG. 59 –
WELDED BEVEL SEAL FILTER INSTALLATION
The patented Bevel Seal frame is a factory welded,
extruded aluminum frame developed specifically for High
Efficiency Particulate Air (HEPA) filter installations.
The modular frames can be quickly bolted together in
any combination. Bevel Seal frames are non-directional
and can be installed with filter access from either the
air entering or air leaving side. Standard Bevel Seal
frames accommodate 24" x 24" gasketed HEPA filters
in three thicknesses — 2-3/4", 5-7/8" and 11-1/2".
Frames are available for special size filters. The frames
are designed to permit installation of adjacent filters at
3/4" intervals. This design feature maximizes the num-
ber of filters that can be installed in a given space and
reduces resistance due to frame extrusions.
Two Stage gasket compression prevents leakage
The patented Bevel Seal frame features a two level
sealing surface connected by a bevel. This causes the
filter gasket to be compressed in two stages as clamp-
ing pressure is applied.
GASKET PROTECTION
In the event excessive clamping pressure is applied, the
individual cells in the gasket material can be fractured
causing the gasket to relax, allowing leakage.
WELDED BEVEL SEAL FRAME
Extruded Aluminum Frames for Gasketed
HEPA Filter Installations
BEVEL SEAL FRAME
BEVEL
RECESSED SEALING
SURFACE
DUCTWOR
SPRING
O
O
OW
OW
GASKET
T
CELL SIDE
E
CELL SIDE
VISUAL CONTROL CLAMP
(ADJUST BOLT HEAD FLUSH
WITH CLAMP)
BEVEL SEAL
FRAME
(PERIMETER
EXTRUSION)
MEDIA PACK
Sealing Integrity Assured
The bevel creates sealing integrity by providing a gradu-
ated compression of the sealing gasket. The outer edge
of the gasket is compressed to a greater degree than the
inner portion of the gasket. Having two levels of gasket
compression ensures an effective seal will be achieved.
By preventing damage in the recessed sealing surface
area, two stage compression
preserves sealing effectiveness should the cellular struc-
ture on the outer edge of the gasket be destroyed.
PATENTED VISUAL CONTROL FILTER CLAMPS
HEPA Filter Applications
AAF Visual Control clamps are designed to be used with
any conventional gasketed HEPA filter. Located approxi-
mately two feet apart, the calibrated spring-loaded clamps
maintain up to 100 pounds pressure against the filter at
each clamping point. Four clamps are used per filter to
assure uniform pressure against the gasket. The clamps
have a 1-1/2" wide bearing surface.
Easy Clamp Installation
No special tools are required for proper clamp installa-
tion. Just tighten the bolt head until it is flush with the
clamp face to achieve the prescribed compression.
Proper clamping pressure is created indefinitely by the
calibrated spring.
Single filter clamps are used around the perimeter of the
frame bank. Double clamps are used along main runners
to secure a filter on either side of the T-Section.
LD06646
LD06645
FIG. 58 –
BEVEL SEAL EXTRUSION SECTIONS
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