SYNRUI Environmental Technology (Liaocheng) Co., Ltd. is a manufacturer specializing in cleanroom air filtration systems.
SYNRUI boasts a 20,000㎡ modern factory, a 3,500㎡ Class 100,000 cleanroom, automated filter media folding lines, a metal processing center, filter cartridge filling lines, and a complete machine assembly workshop, achieving end-to-end production capabilities from filter media → filter cartridges → fan equipment → complete cleanroom air solutions.
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Automatic Self Cleaning Pass BoxesAutomatic self cleaning pass boxes are used to transport materials between clean areas. They feature an independent internal air circulation and cleaning system. Before each transfer, the windows
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HEPA Air ShowersHEPA air showers, widely used as buffer devices at cleanroom entrances, utilize high-speed clean airflow to remove particles from clothing surfaces, thereby reducing the risk of dust entering clean
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Cleanroom BoothThe cleanroom booth is a mobile clean space system that can quickly and efficiently create localized clean areas meeting ISO Class 5–8 standards within existing buildings. The system uses built-in
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Laminar Flow CabinetA laminar flow cabinet is a local cleanroom maintenance device that uses vertical or horizontal unidirectional airflow technology. It features a high-efficiency HEPA/ULPA filtration system that
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Portable Laminar Flow CartPortable laminar flow cart, which function as mobile purification devices, are primarily used for the safe transfer of materials into critical clean areas. Utilizing a meticulously designed
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Cleanroom Weighing BoothA cleanroom weighing booth is a classified cleanroom, providing a local clean space specifically designed for weighing and packaging raw materials, auxiliary materials, or medicines. It utilizes a
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Automatic Roll FilterEngineered for high-dust environments and continuous operation, the automatic roll filter is an intelligent filtration solution. It automatically renews the filter media, eliminating the downtime and
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Air Shower For CleanroomAir shower for cleanroom is mandatory cleaning equipment for personnel or goods entering clean areas. They are typically located at the boundary between clean and non-clean areas, serving as a
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HEPA Clean BenchA HEPA clean bench is a specialized device that uses air filtration technology to create a localized dust-free and sterile environment. Its core principle is to pre-treat air through primary and
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Self Sanitizing Pass BoxAs a core component of modern clean production environments, self sanitizing pass box, with their efficient airflow control and filtration systems, prevent cross-contamination during the transfer
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Self Cleaning Transfer WindowA self-cleaning transfer window is an auxiliary device installed on the clean room wall, primarily used for transferring small items between clean areas or between clean and non-clean areas. It is
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Bag In Bag OutBag in bag out is a kind of purification equipment that collects toxic and harmful dust particles and chemical gas substances on the filter and replaces the filter in a non-contact way through a

Unlike pure trading companies and assembly factories in the market, SYNRUI's core advantage lies in its 100% self-manufacturing and self-testing of filters (from filter media, pleating, potting to scanning inspection).
SYNRUI possesses independent R&D and structural design capabilities for complete products (FFU, air filter boxes, Laminar Flow Hood, etc.).
All products undergo individual testing for airflow, resistance, efficiency, leakage, and temperature resistance.
SYNRUI offers OEM/ODM customization and can handle large-scale international projects.
SYNRUI provides comprehensive solutions, not just individual product sales.
You no longer need to separately find filter manufacturers, purification equipment manufacturers, or engineering companies; instead, you can obtain complete, verifiable, and executable air filtration system solutions through SYNRUI.
Air Filter Series
Pre-Filter
Medium Efficiency Air Filter
EPA Filter
HEPA Filter
ULPA Filter
High Temperature Filter
Gel Seal Filter
Chemical Filter
Industry Applications: Semiconductor, Pharmaceutical, Biological Laboratories, Food Factories, Lithium Batteries, Optoelectronic Manufacturing, Precision Machining, Hospitals, Biosafety Environments, etc.
Fan Filter Unit (FFU)
Bag-In Bag-Out System (BIBO)
HEPA Box
Laminar Flow Hood
Pass Box
Air Shower
Clean Booth
Clean Bench
Weighing Booth
Laminar Flow Cart
Product Advantages
1. Self-produced Filter Media + Self-produced Filter Elements + Self-produced Equipment
Most products on the market only:
Buy filter elements → Assemble equipment
Buy fans → Pack
SYNRUI, however, possesses:
Filter media forming and folding lines
Automatic glue dispensing equipment
Metal sheet metal center
Complete equipment assembly line
More controllable quality.
2. All products are tested individually, not randomly
Most products on the market are randomly inspected, while we:
Measure airflow/static pressure/noise of each FFU individually
Scan leaks on each HEPA filter individually
Test each piece of equipment during operation
Reduce quality risks.
Higher aerodynamic efficiency design
Our air-end equipment uses an optimized airflow structure, which significantly reduces pressure loss and eddies, resulting in more uniform airflow in cleanrooms.
Lighter and more durable structural design
Through structural optimization and material control, some products are 10-25% lighter than the industry average, while maintaining higher strength.
Product Process
Filter Cartridge Process:
HEPA/ULPA Precision Folding
Automatic Potting and Sealing
Leak Scanning Detection
Unit-by-Unit Efficiency Testing
Equipment Process:
Sheet Metal Digital Bending, Error <0.2mm
Laser Welding, Improving Airtightness
Robotic Riveting Structure
Internal Air Duct CFD Optimization
Fan Dynamic Balancing Correction
Overall Airflow and Noise Testing (Full Inspection)
All processes are designed around "stability, energy saving, and long lifespan".

Application Areas
Semiconductor Plants
Pharmaceutical Aseptic Production Lines
Biochemical Laboratories
Food Cleanrooms
Lithium-ion Battery Drying Rooms
Optoelectronic Display Manufacturing
Medical Institutions
Precision Manufacturing Plants
Host Cleanrooms and Local High-Cleanliness Zones
Why Choose Us
SYNRUI is one of the world's leading clean air manufacturers, possessing:
Full-chain manufacturing capabilities (filter media → filter cartridges → equipment)
100% full inspection system
Experience in delivering large projects
OEM/ODM support
International standard certifications
Mature engineering application cases
Factory direct supply, high cost-performance ratio
Our solutions have served 70+ countries.

FAQ
Q: 1. How to select filters according to cleanroom class?
A: ISO3–ISO5: ULPA/HEPA (H14/U15/U16)
ISO6–ISO8: Medium + HEPA (H13)
We can select filters free of charge based on airflow, differential pressure, and equipment structure.
Q: 2. How often should the filters be replaced?
A: Typically 1–3 years, depending on dust concentration, pre-filter level, and usage hours.
Q: 3. How do you ensure the filters are leak-free?
A: We use EN1822/ISO29463 for unit-by-unit leak testing, not random sampling.
Q: 4. Can you provide complete cleanroom solutions?
A: Yes, SYNRUI can provide equipment + filter + airflow/velocity configuration solutions.
Q: 5. Do you support OEM/ODM?
A: Fully supported. We can provide drawings, labels, appearance, and size customization.
Q: 6. Why do your filters have a longer lifespan compared to others on the market?
A: Due to the use of high-capacity filter media, uniform pleating technology, and a lower resistance design.
Q: 7. How do you guarantee delivery time?
A: We have a safety stock system for raw materials and sufficient stock of standard products, enabling fast delivery.
Q: 8. Can you provide CE or third-party reports?
A: Yes, CE, ISO9001/14001/45001 certifications are all available, and CNAS third-party testing can also be provided.
Q: 9. Does the air-end equipment require commissioning?
A: Some equipment, such as FFUs, air showers, and HEPA boxes, require commissioning. We provide remote or on-site guidance.
Q: 10. Can different types of filters be mixed and matched?
A: A proper combination based on system pressure differential and airflow curves is required. We can provide professional solutions.
If you are looking for stable, energy-efficient cleanroom air filtration equipment that can be implemented in engineering projects, please contact us immediately.
We offer free technical consultation, engineering design, and a quick quote.
As one of the most professional clean room filtration equipment manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy clean room filtration equipment for sale here from our factory. Contact us for quotation.




























































