sales@koinfilter.com
sales@koinfilter.com

HEPA Filter Box

  • Full metal housing, good durability and no pollution
  • Various flange and connection port designs available
  • Ensure the jet speed of the air flow and prevent the generation of vortex
  • Can be designed for PAO testing, easy to operate
  • Beautiful and elegant, compact structure, easy to install and maintain
Hepa Filter Box

What is A HEPA filter Box and Why do you need them?

The HEPA filter box is a non-powered air supply device. Its flange port cooperates with the air-conditioning air supply system and is filtered by the built-in HEPA filter (filtration efficiency is 99.97-99.997%@0.3um). It directly supplies air to the end of the clean room to ensure it meets cleanliness standards.

It is the terminal equipment in the purification air supply system. For the air to obtain an ideal static pressure before passing through the HEPA filter, the air outlet of the HEPA filter can be evenly distributed. At the same time, the HEPA filter boxes that require on-site leak detection are also equipped with a PAO sol dust inlet and upstream concentration detection port, pressure difference detection port, and diffusion plate based on customer requirements.

The HEPA filter box includes a static plenum box, a diffuser plate, a HEPA filter, and a flange. The interface with the air duct can be a top or side connection.

The HEPA filter box is an ideal terminal filtration device for 1000-level, 10,000-level, and 100,000-level purification air-conditioning systems. It can be widely used in air filtration systems in medicine, health, electronics, and chemical industries.
The HEPA filter box is used as a terminal filtration device for renovating and constructing clean rooms on all levels from 1000 to 300000. It is crucial equipment to meet the cleanliness requirements.

Classification of HEPA filter box

The structure of the HEPA filter box is relatively complex. At the same time, according to the requirements of different clean room filtration systems and the design of clean engineering, there are many classification designs of HEPA filter boxes.

According to the shape of the diffuser
According to the shape of the diffuser

It can be divided into three types: orifice plate, orifice plate with slits, and radial slit plate.

According to the sealing form
According to the sealing form

It can be divided into two types: positive pressure sealing (Gel seal, rubber strip) and negative pressure sealing.

According to the adjustment mode of the regulating valve
According to the adjustment mode of the regulating valve

It can be divided into two types: upper adjustment and lower adjustment.

According to whether it contains PAO aerosol detection port
According to whether it contains PAO aerosol detection port

It can be divided into two types: with PAO detection port and without detection port.

According to the shape of the interface
According to the shape of the interface

It can be divided into two types: circular interface and square interface

According to the position of the connection
According to the position of the connection

It can be divided into two types: top connection and side connection

HEPA filter BOX General Configuration and Specification

General Configuration

The body material Sealing type Connect type Outlet air speed Efficiency EN1822 Installation Optional accessories
Static spraying cold rolled steel/stainless steel Gel seal/dry seal Round or rectangular interface; Side joint or top joint < 2.5 m/s H13-U16 Lifting type/keel stacked type Air regulating valve/cabinet insulation cotton/Pressure difference test interface (or differential gauge)

Gel seal HEPA filter box specification

  • Located at the bottom of the casing, a metal adjustment rod is connected between the butterfly valve regulating device and the butterfly air damper. This device can be rotated directly from the bottom to control the butterfly valve, adjusting the airflow entering the room simply and conveniently.
  • The surface of the casing is treated with electrostatic powder coating, providing strong corrosion resistance.
  • With a unique sealing method, it comes equipped with a PAO dust emission port and concentration sampling port, fully meeting the requirements of the new GMP specifications.
  • The rotating pressure block allows for the safe and quick replacement of the HEPA filter, enhancing convenience.
  • Customization is available according to your requirements.
Gel sela HEPA filter box
CHM Body Size WxLxH(TOP air inlet) mm Body Size WxLxH(Side air inlet) mm HEPA filter size WxLxH mm Mounting hole size WxL mm Air inlet Size (top/side mm)
500 563x563x280 563x563x400 450x450x93 573x573 200/200
1000 723x723x280 723x723x400 610x610x93 733x733 320/200
1500 723x1028x280 723x1028x400 610x915x93 733x1038 400/200
2000 723x1333x280 723x1333x400 610x1220x93 733x1343 400/250

Dry/normal seal HEPA filter box specification

  • The static pressure chamber is constructed from a high-quality cold-rolled steel plate (electrostatic powder coating) or welded stainless steel, featuring a leak-proof structural design. Special treatment is applied to all weld seams to ensure the tightness of the casing.
  • It can be directly suspended for lifting or installed on ceiling joists. It can also be connected directly to the air duct and is easy to maintain. Customization options include adjustable valves, insulation layers, and top/side air intake methods according to user requirements, such as round top connection, round side connection, square top connection, and square side connection.
  • Each of the four edges of the HEPA filter is equipped with a pair of pressure blocks. During installation, adjust the pressure blocks to be perpendicular to the filter frame and tighten them. Material options for the pressure blocks include cast aluminum with nickel plating, ABS plastic, stainless steel, and more.

  • Accessory options include:

    1. Insulation cotton (standard thickness 15mm, customizable thickness).
    2. Dust emission ring (available in straight pipe and circular ring forms, with three material options: stainless steel, aluminum, and PVC).
    3. Air volume valve (adjustable from the top or bottom).
  • Customization is available according to your requirements.
Dry seal HEPA filter box
CHM Body Size WxLxH(TOP air inlet) mm Body Size WxLxH(Side air inlet) mm HEPA filter size WxLxH mm Mounting hole size WxL mm Air inlet Size (top/side mm)
500 563x563x310 563x563x460 450x450x93 573x573 200/200
1000 723x723x310 723x723x460 610x610x93 733x733 320/200
1500 723x1028x310 723x1028x460 610x915x93 733x1038 400/200
2000 723x1333x310 723x1333x460 610x1220x93 733x1343 400/250

Tips for choosing HEPA filter box

  • Choose a HEPA filter box with a top air intake when the installation space is sufficient.
  • The outer casing coating should be spray-coated or painted as much as possible.
  • Avoid spray paint coating (the coating is easy to peel off).
  • Choose an insulated HEPA filter box.
  • Choose a diffusion with convex diffusion holes.
  • Choose a HEPA filter box with a pressure frame compression structure. This structure will receive uniform force when compressing the HEPA filter (especially HEPA filters with aluminum alloy frames, which are prone to deformation when the force is uneven).
Choose your HEPA filter box
HEPA filter box
Hepa Filter Box

Precautions for installing HEPA filter box

  1. The first important thing before installation is that the size and efficiency requirements of the HEPA filter box must comply with the clean room on-site design requirements and customer application standards.
  2. The transportation of HEPA filter boxes must be placed strictly in accordance with the directions indicated by the manufacturer’s signs. During transport, they must be handled carefully, and violent vibrations and collisions must be avoided.
  3. Before installing the HEPA filter box, the clean room must be cleaned in all aspects. For example, dust in the air conditioning system should be cleaned and removed to meet the cleaning requirements. The mezzanine or ceiling also needs to be cleaned. The purification air conditioning system must be continuously operated for more than 12 hours and then cleaned again.
  4. Before installing the high-efficiency air supply vent, an on-site visual inspection is required, including whether the filter paper, sealant, and frame are damaged; whether the side length, diagonal and thickness dimensions meet the requirements; whether the frame has burrs and rust spots (metal frame); whether the technical performance meets the design requirements.
  5. During installation, reasonable adjustments should be made based on the resistance of each HEPA filter box. For unidirectional flow, the difference between each filter’s rated resistance and each filter’s average resistance between the same air outlet or air supply surface should be less than 5%.
  6. The joints between the flanges of the HEPA filter box and the ceiling panels are treated with sealing gaskets. Remember that cracks must be dealt with strictly. Do not install the HEPA filter box if it is damaged or the coating is damaged. The HEPA filter box and air duct must be rigidly connected, and the open end must be reinforced and sealed.
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Established in 2006, koinfilter is a top-notch air filter manufacturer known for its patented ideas and good quality. We are great at new ideas, customizing, and keeping quality consistent. We can handle air filtration for any industry with our knowledge. We do everything from designing and making the filters. We make sure they work great and won’t let you down. We care about you and want to make sure you’re happy with everything we do.

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