Form PA102.20-N1
57
Installation & Assembly Manual │
PACE
SECTION 3 - HANDLING, STORAGE, AND INSTALLATION
Issue Date: 07/03/2018
3
LD20623
Figure 91 -
Koch HF
Welded Bevel Seal Frame
Extruded Aluminum Frames
The bevel seal frame is a factory welded, extruded alu-
minum frame developed specifically for High Efficien-
cy Particulate Air (HEPA) filter installations. Standard
bevel seal frames accommodate multiple sizes of gas-
keted HEPA filters 11-1/2 in. deep as shown in
Two Stage Gasket Compression
The bevel seal frame features a two level sealing sur-
face connected by a bevel, which causes the filter
gasket to be compressed in two stages as clamping
pressure is applied. The outer edge of the gasket is
compressed to a greater degree than the inner portion
of the gasket, as shown in
.
Do not apply excess clamping pressure
because the individual cells in the gas-
ket material may fracture, causing the
gasket to relax, allowing leakage.
2 in
2 in
2 in
T-Section
Perimeter Section
Type H
Main Runner
Perimeter Extrusion
LD06674a
Figure 92 -
Hepa Filter (Cross Section)
VISUAL CONTROL FILTER CLAMPS
HEPA Filter Applications
Visual control clamps, as shown in
are designed to use with any conventional gas-
keted HEPA filter. Located at midpoint of each filter
edge, the calibrated spring-loaded clamps maintain up
to 100 lb pressure against the filter at each clamping
point. Four clamps, which have a 1-1/2 in. wide bearing
surface, are used per filter to assure there is uniform
pressure against the gasket.
Installing the Easy Clamp
No special tools are required to install the clamp prop-
erly. 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 cali-
brated spring.
Single filter clamps are used around the perimeter of the
frame bank. Double clamps are used along main run-
ners to secure a filter on either side of the T-section as
