Three-quarter view of modular stainless air filter holding frame

Air Filters and Chemical Filtration

Modular Air Filter Holding Frame

A rigid gasketed mounting frame that secures one HVAC filter or joins with matching units to form a built-up filter bank.

Modular Bank Assembly
Four-Point Clamping
Continuous PU Gasket
Automatic Filter Alignment

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Product Introduction

The holding frame provides a square, repeatable sealing surface for panel, bag and compact filters. Formed galvanized or stainless profiles are welded at the corners and include punched holes for bolting adjacent frames into a bank. Four spring or toggle clamps press the filter header against a continuous polyurethane gasket, while locating tabs keep the element centred. The open face remains unobstructed when the clamps are released for quick removal.

Key Features

Punched modular flanges align multiple frames without field measurement.

Four clamps distribute pressure around the filter header.

An endless polyurethane gasket limits bypass at the mounting face.

Locating tabs centre the filter and prevent lateral movement under airflow.

Customer Product Concerns

A built-up filter bank needs consistent geometry and sealing pressure at every cell to avoid local bypass.

Field-built frames vary in size and leave irregular gaps.Factory-formed modules use repeatable dimensions and pre-punched connecting holes.

One loose corner creates a bypass path around the filter.Four independent clamps maintain face pressure around the complete header.

The element shifts while the air handler starts.Top and bottom locating guides hold the filter square within the frame.

Clamp hardware blocks the opening during replacement.Offset swing or spring clamps move clear of the full filter cross-section.

Typical Applications

Air-handling unit filter banksCleanroom prefilter wallsBag-filter installationsCompact fine-filter racksIndustrial ventilation plenums

Technical Parameters

Representative sizes and materials for a modular air-filter holding frame are listed below.

Core Material	Formed galvanized or 304 stainless-steel frame with spring-steel or stainless clamps
Panel Thickness	1.2–2.0 mm formed frame profile
Effective Width	305–610 mm nominal filter-cell width
Maximum Length	Up to 610 mm nominal single-frame height
Steel Facing Thickness	1.2–2.0 mm galvanized or stainless frame material
Core Density	Approximately 7850–8000 kg/m³ for steel frame construction
Thermal Conductivity	Approximately 14–60 W/(m·K) depending on selected steel
Surface Finish	Mill-galvanized, brushed stainless steel or powder-coated finish
Joint Type	Welded square frame with pre-punched bank connections, continuous PU gasket and four clamps
Customization	Available based on the intended application and operating environment.

Available Options

Galvanized or stainless steel25 or 50 mm clamp heightHalf-size and full-size cellsPrefilter and compact-filter configurations

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