Fixed Filter Frame for Panel & Bag Filter - China Suppliers & 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.
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.
- 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.
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.
- 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 is a filter holding frame used for?
A filter holding frame is used to securely fix and support air filters — including panel filters and bag filters — inside air handling systems. It ensures stable positioning, proper sealing, and easy maintenance of the filter elements.
Q What materials are panel-type holding frames typically made from?
Panel-type holding frames are commonly manufactured from galvanized steel sheet, aluminum profile, or high-quality plastic. The choice of material depends on the application environment, budget, and required durability.
Q How does a bag filter holding frame achieve a reliable seal?
Bag filter holding frames use cam lock handles or spring clips to press the bag filter's flange firmly into each opening. This mechanism creates a tight, reliable seal that prevents unfiltered air from bypassing the filter media.
Q Can individual bag filters be replaced without disturbing the others?
Yes. Bag filter holding frames are specifically designed to allow individual bag replacement. Each opening has its own independent clamping mechanism, so one bag can be removed and replaced without affecting the remaining bags in the same frame.
Q What types of installation methods are available for panel filter holding frames?
The most common installation methods include slot-type (the filter slides directly into guide slots), clamping strip/clip-type (metal or plastic clips press the filter against the frame), and magnetic-type (magnetic strips allow the frame to attach directly to metal surfaces for tool-free removal).
Q Why is sealing so important in a filter holding frame?
Proper sealing is critical because any gaps between the filter edges and the frame allow unfiltered air to bypass the filter media entirely — a phenomenon known as "short-circuiting." This compromises air quality and renders the filtration system ineffective, no matter how efficient the filter media itself may be.