Welded Bevel Seal Frame; Visual Control Filter Clamps; Hepa Filter Applications; Figure 91 - Koch Hf - Pace PAI Installation And Assembly Manual

SECTION 3 - HANDLING, STORAGE, AND INSTALLATION

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 Figure
90 on page 56.
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.
Form PA102.20-N1
Main Runner
2 in
T-Section

Figure 92 - Hepa Filter (Cross Section)

VISUAL CONTROL FILTER CLAMPS

HEPA Filter Applications

Visual control clamps, as shown in Figure 91 on page
57, 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
LD20623
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
shown in Figure 91 on page 57.
57
Installation & Assembly Manual │ PACE
Perimeter Extrusion
2 in
2 in
Perimeter Section
Type H
LD06674a
Issue Date: 07/03/2018
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