What types of materials are used for transferring Windows?

The transfer window is a device used for transferring items between clean areas and non-clean areas or between clean areas of different levels. The selection of its material needs to take into account factors such as cleanliness, corrosion resistance, and durability. The following are the common material classifications and characteristics of transfer Windows:
I. Material of the main frame
Stainless steel material
304 stainless steel: One of the most commonly used materials, it has excellent corrosion resistance and rust prevention, and is suitable for general clean workshops (such as in the food and electronics industries).
316 stainless steel: Containing molybdenum, it has stronger corrosion resistance and is especially suitable for humid, acidic, and alkaline environments or high-cleanliness scenarios such as the pharmaceutical industry.
Features: Smooth surface that is easy to clean, in compliance with GMP (Good Manufacturing Practice) requirements, not prone to bacterial growth, and has a long service life.
Cold-rolled steel plates with plastic spraying
The main frame is made of cold-rolled steel plate, and its surface is treated with electrostatic powder coating (usually white or gray).
Features: Low cost, but weaker corrosion resistance than stainless steel, suitable for scenarios with low cleanliness requirements (such as ordinary laboratories).
Aluminum alloy material
It adopts high-strength aluminum alloy profiles, which are light in weight, and high in strength and the surface can be oxidized.
Features: Corrosion-resistant and aesthetically pleasing, but with a relatively high cost, it is often used in clean areas with lightweight requirements.
Ii. Materials of the inner wall and bottom plate
Stainless steel material (304 or 316)
The inner wall and bottom plate are usually made of the same material as the main frame to ensure overall corrosion resistance and ease of cleaning.
Application scenarios: Industries with strict cleanliness requirements such as pharmaceuticals, biological products, and precision electronics.
Engineering plastics (such as PP, PE)
To reduce costs or meet specific requirements (such as acid and alkali resistance), the inner walls of some transfer Windows can be made of corrosion-resistant engineering plastics.
Features: Lightweight, resistant to chemical corrosion, but poor heat resistance, suitable for slightly corrosive environments.
Iii. Door Body Material
Stainless steel plate + glass
The door body panel is made of stainless steel plate, with transparent glass (such as tempered glass or Plexiglas) inset in the middle, providing convenient observation of the internal conditions.
Features: Sturdy and durable, good visibility, often used in standard transfer Windows.
Acrylic (plexiglass)
The door body is made of transparent acrylic material, which is lightweight and low-cost, but has relatively weak impact resistance.
Application scenarios include laboratories, small clean areas, and other environments where strength requirements are not high.
Iv. Sealing Material
Silicone rubber sealing strip
It has good elasticity and aging resistance, high-temperature resistance, and corrosion resistance, and is suitable for most clean environments.
Ethylene propylene Diene monomer (EPDM
It has strong weather resistance and ozone resistance and is suitable for humid or large temperature difference environments.
V. Materials of Other accessories
Control panel and electronic components
The panels are mostly made of stainless steel or engineering plastics, and the internal components need to meet the dust-proof and moisture-proof standards (such as the IP54 protection level).
Fans and Filters
The casing of the fan is commonly made of metal with plastic spraying or engineering plastics, and the filter frame is made of aluminum alloy or stainless steel (such as high-efficiency filters HEPA).
Vi. Basis for Material Selection
Cleanliness level: 316 stainless steel should be selected for GMP workshops in the pharmaceutical industry, while 304 stainless steel can be used for general clean areas.
Usage environment: In damp, acidic, or alkaline environments, 316 stainless steel or engineering plastics are preferred. In high-temperature environments, the heat resistance of the material (such as silicone rubber seals) needs to be taken into consideration.
Cost budget: Stainless steel material has a relatively high cost. Cold-rolled steel plates with plastic spraying are suitable for scenarios with limited budgets.
Summary
The material selection for transfer Windows should comprehensively consider cleanliness, corrosion resistance, application scenarios, and cost. Among them, stainless steel (especially 304 and 316) is the most mainstream choice, which can meet the cleanliness requirements of most industries. If there are special working conditions (such as anti-corrosion and high-temperature resistance), engineering plastics or special sealing materials can be specifically matched.