YONGFAN HVAC - Premium Header
Engineered HVAC & Industrial Air Systems
Product Finder Technical Support Download Center
YONGFAN HVACYOFAN HVAC Home
Request a Quote
Contact UsGlobal sales team contacts Request a Quote (RFQ)Submit BOQ or equipment list Request Product SelectionGet customized engineering sizing
Filter Frames & Accessories | YONGFAN
Filter Bank Mounting Interface · Galvanized / Stainless Steel

Filter Frames & Accessories: Zero-Bypass Bank Alignment

A filter can meet its rated efficiency and still underperform in the system if the mounting frame does not hold it square, seal it correctly, or allow it to be replaced without damage.

Compare YONGFAN modular Filter Fixing Frames across standard external dimensions (610×610, 508×508, 305×610 mm), 70 mm body depths, insert retention thicknesses (20 mm, 45 mm, 65 mm), and galvanized vs. stainless steel construction for bag, panel, and flanged filters.

3 Standard Sizes 610×610 · 508×508 · 305×610
Insert Depths 20 mm · 45 mm · 65 mm
Frame Depth 70 mm Standard Body
Material Choice Galvanized Steel · Stainless Steel
Select a Fixing Frame Review Interface Risks
YONGFAN box-filter fixing frame assembly
Mechanical Mounting Integrity Precision Squareness, Uniform Gasket Compression & Modular Bank Grids
01 / Mechanical Interface

Filter-Bank Problems Often Begin with the Mounting Interface

A filter schedule may look correct on paper. Yet after installation, maintenance finds gaps around the perimeter, uneven gasket compression, or elements that cannot be removed without bending frames.
YONGFAN pressure-tap filter holding frame
Mounting Integrity

Why Holding Frames Determine Real System Capture

The fixing frame forms the mechanical bridge between filter and AHU duct wall. It maintains positive seal contact and allows element changeout without structural dismantling.

Oversized Frame Perimeter Bypass

A fixing frame that exceeds nominal tolerances leaves loose perimeter clearances where untreated air slips completely past filter gaskets.

Impact: Total loss of rated filtration efficiency

Undersized Frame Filter Distortion

A frame opening that is too small pinches the filter element, distorting header flanges and damaging fragile media during insertion or extraction.

Impact: Media tearing & difficult element servicing

Insert Depth Mismatch

Assigning a 20 mm insert to a 45 mm or 65 mm filter forces over-compression or leaves elements vibrating and loose under turbulent airflow.

Impact: Element dislodgement & seal failure

Bank Tolerance Multiplication

In multi-stage walls, small squareness errors multiply across adjacent cells, producing irregular gaps and misaligned filter rows.

Impact: Structural racking & inter-frame leakage

Match Four Core Factors Before Releasing Bank Schedules

Fixing frame engineering requires coordinating filter face dimension, holding insert depth, bank grid layout, and operating environment.

01 Filter Face Size (610 / 508 / 305 mm)
02 Insert Thickness (20 / 45 / 65 mm)
03 Bank Module Assembly Grid
04 Frame Alloy (Galvanized vs Stainless)
02 / Technical Parameters

Frame Size and Insert Thickness Solve Different Problems

External frame dimensions determine how the unit mounts into the AHU wall. Insert thickness determines which filter depth the frame securely retains.
Specification 01 / Outer Grid

External Face Dimensions

YONGFAN standardizes three external formats: 610×610 mm (full-size module), 508×508 mm (intermediate square), and 305×610 mm (half-width module) with standard 70 mm body depth.

Specification 02 / Retention

Insert Thickness Options

Available in 20 mm, 45 mm, and 65 mm inserts. The insert determines clamping depth and gasket compression for panel, bag header, or rigid box elements.

Specification 03 / Material

Material Selection

Supplied in galvanized steel plate for standard dry HVAC environments, or stainless steel plate for corrosive, wet, or washdown cleanroom applications.

YONGFAN Filter Fixing Frame Standards

Standard catalog specifications from YONGFAN air-filtration mechanical data.

Modular Bank Standard
Full-Size Frame
610×610 mm
70 mm Body · 20 / 45 / 65 mm Inserts · GI / SS
Intermediate Frame
508×508 mm
70 mm Body · 20 / 45 / 65 mm Inserts · Retrofit banks
Half-Width Frame
305×610 mm
70 mm Body · 20 / 45 / 65 mm Inserts · Bank width edge
Custom Sizing
Bespoke W×H×D
Made-to-order dimensions · Tailored insert profiles
03 / Standard Formats

Choose the Frame by the Filter It Must Retain

YONGFAN’s modular fixing frame range enables flexible assembly into multi-cell filter walls for AHUs, plenum walls, and duct banks.
Standard Size 01 · 610×610 Series Full-Size Square Module

610 × 610 × 70 mm Filter Fixing Frame

The 610 × 610 × 70 mm fixing frame is the primary full-size square format in YONGFAN’s mounting range. It is the core building block for standard AHU filter walls designed around repeated full-size modules.

Available with 20 mm, 45 mm, or 65 mm insert thickness to securely retain bag filter headers, 45 mm primary panels, or rigid compact boxes. Units are pre-punched for modular side-by-side assembly into large multi-cell grid arrays.

External Dimensions
610 × 610 × 70 mm (W × H × D)
Insert Options
20 mm · 45 mm · 65 mm
Material Choice
Galvanized steel plate or Stainless steel plate
Modular Assembly
Freely assembled into multi-cell banks
Insert Selection: Do not select insert depth by face size alone. Verify the exact header flange thickness or filter depth (e.g. 20 mm bag header vs 45 mm CG panel) on the approved filter drawing.
Request 610×610 Sizing Check Compatibility
YONGFAN 21 mm filter fixing frame
610 × 610 × 70 mm Full-Size Frame
Module Features:
  • Standard 24″ × 24″ equivalent grid module
  • Uniform clamping force across perimeter gasket
  • Modular pre-drilled holes for rapid bank bolting
  • Rigid corner joints prevent out-of-square racking
Standard Size 02 · 508×508 Series Intermediate Square Module

508 × 508 × 70 mm Filter Fixing Frame

The 508 × 508 × 70 mm fixing frame provides an intermediate square format for air-handling units, package air cabinets, and retrofit filter banks built around smaller square openings.

Shares the same 20 / 45 / 65 mm insert options as the full-size frame, allowing engineers to maintain uniform holding depth while fitting compact equipment cross-sections.

External Dimensions
508 × 508 × 70 mm (W × H × D)
Insert Options
20 mm · 45 mm · 65 mm
Target Application
Compact AHUs, retrofit banks, packaged units
Material Choice
Galvanized steel plate or Stainless steel plate
Retrofit Check: Measure clear AHU usable opening rather than old filter labels. Internal clips or stiffening angles can restrict physical insertion.
Request 508×508 Sizing Check Compatibility
YONGFAN stainless-steel filter frame
508 × 508 × 70 mm Intermediate Frame
Retrofit Capabilities:
  • 20″ × 20″ equipment opening replacement
  • Eliminates bypass in legacy compact AHUs
  • Rigid holding force for bag and panel elements
  • Compatible with custom bank layouts
Standard Size 03 · 305×610 Series Half-Width Bank Module

305 × 610 × 70 mm Filter Fixing Frame

The 305 × 610 × 70 mm fixing frame is the standard half-width module in YONGFAN’s documented range. It completes the edges of filter walls when total AHU duct width does not divide cleanly into full 610 mm modules.

Features identical 70 mm frame body depth and 20 / 45 / 65 mm insert choices, ensuring seamless mechanical alignment and co-planar sealing lines when bolted directly beside full-size 610×610 frames.

External Dimensions
305 × 610 × 70 mm (W × H × D)
Insert Options
20 mm · 45 mm · 65 mm
Role in Bank
Half-width module for complete bank width fit
Material Choice
Galvanized steel plate or Stainless steel plate
Grid Alignment: A half-width frame requires equal support rails and clamping force. Check that inter-frame joining bolts maintain airtight continuous contact between adjacent modules.
Request 305×610 Sizing Check Compatibility
YONGFAN modular filter bank frame assembly
305 × 610 × 70 mm Half-Width Frame
Edge Module Benefits:
  • 12″ × 24″ standard edge module
  • Integrates seamlessly into 610 mm multi-cell banks
  • Eliminates blank-off plate airflow dead zones
  • Matches full-size frame insert depth exactly
04 / Filter Family Matching

Match the Frame to the Specific Filter Family

YONGFAN designs the Filter Fixing Frame for bag filters, primary panel filters, rigid compact boxes, and flanged filters.
Application 01

Primary Panel Filters

For CG panels (45 mm), select 45 mm inserts. For thin CCB elements (10 mm), verify custom or shim retention.

Application 02

Extended Bag Filters

For ZF5/6/7/8/9 bags, frames clamp the 20 mm header securely while pockets extend unobstructed downstream.

Application 03

Rigid Pleated & Box Filters

For compact ZZH, ZDZ, or ZYG filters, frames support the front flange interface while downstream track supports box weight.

Application 04

Flanged & Header Filters

Flange width, gasket contact line, and retaining clips must align with the frame’s perimeter sealing lip on the approved drawing.

Standard Frame Size Frame Body Depth Insert Thickness Options Material Options Typical Selection Reason
610 × 610 mm 70 mm 20 / 45 / 65 mm Galvanized steel or Stainless steel Full-size square filter-bank module
508 × 508 mm 70 mm 20 / 45 / 65 mm Galvanized steel or Stainless steel Intermediate square bank or retrofit opening
305 × 610 mm 70 mm 20 / 45 / 65 mm Galvanized steel or Stainless steel Half-width module for mixed bank layouts
*Non-standard W × H × D dimensions, special depths, and custom mounting arrangements are fabricated to project drawings upon request.
05 / Procurement Protocol

Information Required for a Fixing-Frame Quotation

A fixing-frame inquiry should start with the total available AHU opening width and height before dividing the wall into full and half modules.
STEP 01

Total Bank Opening W × H

Provide available clear width and height inside the AHU section to optimize full and half-size module division.

STEP 02

Filter Schedule & Depth

State filter type (bag, panel, compact box), face dimensions, header depth, and gasket contact requirements.

STEP 03

Number of Stages & Access

Specify pre-filter, medium-filter, or final-filter bank stages, and state access direction (upstream vs lateral slide).

STEP 04

Material & Environment

Select galvanized steel for dry HVAC or stainless steel plate for high-moisture, washdown, or corrosive airstreams.

Engineering Handoff

10 Parameters for Accurate Frame Quotes

Send your AHU opening dimensions and filter schedule. YONGFAN application engineers will prepare layout drawings and part numbers.

1. Total AHU Clear Opening: W × H (mm)
2. Module Sizes: 610×610, 508×508, 305×610
3. Insert Thickness: 20 mm, 45 mm, 65 mm
4. Frame Material: Galvanized vs Stainless
5. Filter Type: Bag / Panel / Compact Box
6. Service Access: Front vs Side Withdrawal
7. Filtration Stages (Pre / Medium / Final)
8. Airflow Direction (Upstream / Downstream)
9. Existing Bank Photographs (for Retrofit)
10. Custom Dimensions & Lead Time Target
06 / Manufacturing Verification

YONGFAN Frame Manufacturing & Dimensional Control

Manufactured in-house with precision CNC sheet metal bending, laser cutting, and certified holding-force verification to guarantee airtight modular grid assembly.
Material Verification

Plate Thickness & Grade

Galvanized steel and stainless steel sheets are checked for gauge thickness, zinc coating mass, and metallurgical grade before stamping and bending.

Dimensional Control

Squareness & Tolerances

Frames undergo diagonal and 90-degree squareness checks, ensuring that assembled multi-cell banks maintain coplanar gasket sealing without gap distortion.

Mechanical Retention

Holding-Force Testing

Retention spring latches and clamping arrangements are tested against nominal filter depths (20/45/65 mm) to guarantee positive gasket compression under airflow.

Traceability

Final Inspection & QA

Finished frames are inspected for deburred edges, surface condition, and pre-punched hole alignments before protective export crating.

7–15 Days Fast Dispatch: Standard 610×610, 508×508, and 305×610 mm fixing frames held in stock for rapid dispatch. Custom Fabrication: Non-standard W × H × D dimensions, bespoke stainless grades (304/316), and special multi-stage bank grids manufactured to order.
07 / Engineering Knowledge

Filter Frames & Accessories Frequently Asked Questions

Technical answers to key selection questions regarding frame sizes, insert thicknesses, materials, and bank assembly.

What is the YONGFAN Filter Fixing Frame used for?

It mounts and secures bag, panel, and flanged filters in an AHU or duct bank, providing a repeatable mechanical interface and zero-bypass gasket sealing for filter replacement.

What standard sizes are available?

YONGFAN documents 610 × 610 × 70 mm, 508 × 508 × 70 mm, and 305 × 610 × 70 mm standard frames.

What insert thicknesses are available?

The standard insert options are 20 mm, 45 mm, and 65 mm. The insert must be selected based on actual filter depth and header flange thickness.

Which material should I choose?

Use galvanized steel plate for normal dry indoor HVAC applications. Specify stainless steel plate where higher moisture, washdown, or chemical corrosion resistance is required.

Can the frames be combined into a larger filter bank?

Yes. YONGFAN fixing frames are designed to be freely assembled and combined, allowing full-size and half-size modules to be bolted together into custom bank dimensions.

Can YONGFAN make non-standard frame sizes?

Yes. Non-standard W × H × D dimensions, non-standard depths, and specialized frame alloys are manufactured to order based on project drawings.

Does the fixing frame determine filter efficiency?

No. Filtration efficiency is determined by the filter media element. The frame’s role is strictly mechanical: holding the filter square and maintaining uniform gasket sealing.

Can one fixing frame hold different filter types?

Yes, provided the face dimensions, insert thickness, and retaining clamping method match the filter header profile (bag, panel, or rigid box).

08 / Scope Clarification

Mounting System Scope & Catalogue Boundaries

Understanding verified product scope ensures specifications remain grounded in certified manufacturing data.
Boundary 01 / Product Role

Mechanical Role Only

The fixing frame does not generate filtration efficiency or reduce filter resistance. It maintains mechanical conditions that allow filters to perform as rated.

Boundary 02 / Insert Matching

Insert ≠ Depth Converter

An insert thickness must match the filter header exactly. A 20 mm insert cannot hold a 45 mm filter without replacement or adjustment.

Boundary 03 / Category Scope

Verified Fixing Frames

Current published product scope centers on verified Filter Fixing Frames; standalone differential pressure gauges or custom latches are quoted upon project confirmation.

Boundary 04 / Stainless Steel Grade

Grade Confirmation

If project specifications require specific alloy grades (e.g. AISI 304 or 316), include the exact grade on your RFQ for formal engineering verification.

09 / Engineering Handoff

Configure the Filter Fixing Frames for Your Air Bank

Send your AHU duct opening dimensions, filter schedule, and material preference — YONGFAN application engineers will provide grid layout drawings, module counts, and fixing hardware submittals.

AHU Opening: W × H (mm) Module Sizes: 610 / 508 / 305 mm Insert: 20 mm, 45 mm, 65 mm Galvanized Steel / Stainless Steel Filter: Bag / Panel / Compact Box Front vs Side Access
Request a Frame Quote Go to Selection Center Contact Technical Support
YONGFAN paint-arrestor filter holding frame
Filter Bank Engineering Support
Modular grid calculations, CAD layout drawings & custom sizing confirmation.
YONGFAN HVAC - Premium Footer