Fixed Filter Frame 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
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Fixing and Supporting
Provides stable support for the air filter, preventing it from shaking, deforming, or detaching under airflow impact.
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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.
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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.
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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.
Key Features
- 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.
Common Designs
- 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.
Key Features
- 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.
Common Designs
- 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 (FAQ)
Q
What types of filters are compatible with these holding frames?
These holding frames are compatible with a wide range of filter types, including panel-type pre-filters (primary and medium efficiency) and various bag filters. The frame design varies depending on the filter type — panel frames typically use slot or clamping designs, while bag filter frames use cam lock or spring clip mechanisms.
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What materials are the holding frames made from?
The frames are commonly manufactured from galvanized steel sheet, aluminum profiles, or engineering plastics. The choice of material depends on the application environment, required durability, and budget considerations.
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How does the holding frame ensure an airtight seal?
The frame is designed to press the filter edges firmly against the seating surface, eliminating gaps that could allow unfiltered air to bypass the filter media. For bag filters, cam lock handles or spring clips provide consistent clamping force to maintain a reliable airtight seal.
Q
Can a single bag filter be replaced without removing the entire frame?
Yes. One of the key advantages of the multi-bag holding frame design is that each bag filter pocket has its own independent locking mechanism. This means a single bag can be removed and replaced without disturbing or affecting the other bags in the frame.
Q
What is the difference between a slot-type and a clamping strip-type panel frame?
A slot-type frame features built-in guide slots into which the filter is simply slid in from one side — no additional tools or fasteners are needed. A clamping strip-type frame requires placing the filter first and then securing it with metal or plastic clamping strips, providing a tighter hold and better sealing, especially in higher-velocity airflow applications.
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Are magnetic holding frames suitable for all air handling units?
Magnetic holding frames are best suited for metal air handling units (AHUs) or metal air vents where the magnetic strips can attach securely. They are not suitable for plastic or non-ferrous metal surfaces. Their main advantage is tool-free installation and very quick filter replacement, making them ideal for frequently maintained systems.