Fixed Filter Frames for Panel and Bag Filters - China Suppliers and Factory, Galvanized Steel, Aluminum, Stainless Steel
Application Area
Widely used in different kinds of Panel type pre-filter and Bag filter holding frame.
Main Characteristics
Fixing and Supporting: Provides stable support for the air filter, preventing it from shaking, deforming, or detaching under airflow impact.
Ensuring Sealing: Prevents unfiltered air from "short-circuiting" through gaps between the filter edges and the frame, ensuring all air passes through the filter media.
Facilitating Installation and Replacement: A well-designed installation frame should allow for simple and quick installation and removal of the filter, reducing maintenance difficulty and time.
Protecting the Filter: Prevents damage to the filter edges during handling and installation.
Panel-Type / Sheet Metal Holding Frame
This is the most common type, typically made of metal (such as galvanized steel sheet, aluminum profile) or plastic.
Simple structure and low cost.
Usually used with panel filters (primary, medium efficiency).
Installation is mostly done by sliding the filter into a slot from one side, or securing it via clamping strips or magnetic strips.
Slot-Type: The frame has guide slots; the filter is inserted directly.
Clamping Strip / Clip-Type: After placing the filter, it is pressed tightly against the frame using metal clamping strips or plastic clips.
Magnetic-Type: The frame is equipped with magnetic strips, allowing it to be directly attached to a metal air handling unit or air vent for easy removal.
Bag Filter Holding Frame
Specifically designed for installing bag filters.
The frame has multiple openings, each equipped with a set of clamping devices (such as spring clips, cam lock handles).
During installation, the flange of the bag filter is placed into the opening, and then the lock handle is actuated to press and seal it tightly.
Excellent sealing; replacing a single bag does not affect the others.
Single-Bag / Multi-Bag Holding Frame: Depending on airflow requirements, one frame can hold from 1 to multiple bag filters.
The cam lock handle is the most common fastening method, offering effortless operation and reliable sealing.
Frequently Asked Questions
What is the main purpose of a filter holding frame?
A filter holding frame provides stable mechanical support for air filters, ensures a proper seal to prevent air bypass, and simplifies the installation and replacement process in HVAC systems.
What materials are panel-type holding frames typically made from?
Panel-type holding frames are most commonly made from galvanized steel sheet or aluminum profile for durability and corrosion resistance. Plastic versions are also available for lighter-duty applications.
What is the difference between a panel filter frame and a bag filter holding frame?
A panel filter frame is designed for flat, rigid panel filters using slots, clips, or magnetic strips for installation. A bag filter holding frame features multiple openings with cam lock handles or spring clips specifically designed to secure the flanged pockets of bag filters.
Can a single bag filter holding frame accommodate multiple bag filters?
Yes. Bag filter holding frames are available in single-bag and multi-bag configurations. Depending on the airflow requirements of the system, one frame can be designed to hold multiple bag filters simultaneously.
How does the cam lock handle work on a bag filter holding frame?
The cam lock handle operates by rotating a lever that drives a cam mechanism, pressing the bag filter's flange firmly against the frame opening to create an airtight seal. It is the most common fastening method due to its ease of operation and reliable sealing performance.
Does replacing one bag filter in a multi-bag frame affect the other filters?
No. The individual locking mechanism on each opening of a bag filter holding frame allows a single bag to be replaced independently without disturbing or affecting the sealing of the adjacent filters in the same frame.