One-Stage Filters – Light / Medium Dust
Our one-stage air cleaners are designed for light to medium dust environments, delivering high filtration performance, low restriction, and easy maintenance. Each model mounts directly to the air intake pipe, eliminating the need for brackets or housings — ideal for compact, enclosed, or mobile installations across stationary and containerized equipment. All filters are tested according to ISO 5011 to ensure consistent and reliable performance. Optional service indicators can be integrated externally through our air duct accessories, or directly on the filter cover for selected models (ViroLite).Typical Applications
- Compressors
- Combustion engines
- Power generators
- Marine engines
- Industrial systems
- Logistics vehicles
ViroSeal
ViroSeal is a compact, low-noise air cleaner primarily used on compressors, small engines, and power equipment operating in light to medium dust conditions.
Its radial-seal design provides a leak-free fit under vibration, and the corrosion-resistant plastic housing ensures reliable operation even in humid environments.
Key Advantages
- Direct installation — no mounting bracket required
- Sound-absorbing intake pipe for noise reduction
- Reliable sealing under vibration
- Metal-free, recyclable design
- Tool-free element replacement
- Special versions for vacuum pumps available on request
Properties
- Filtration efficiency: ≥ 99.99 % (ISO 5011)
- Operating temperature: −35 °C to +90 °C (peaks +110 °C)
- Airflow range: 0.2 – 3.0 m³/min @ 15 mbar
ViroPac
ViroPac is a heavy-duty single-stage air cleaner featuring a durable metal housing for long service life in demanding conditions.
It’s widely used on compressors, small engines, and industrial power generators, combining mechanical strength, stable airflow, and easy serviceability.
Key Advantages
- Rugged metal housing for vibration and impact resistance
- Integrated noise-reducing intake system
- Direct installation — no mounting bracket required
- Works in any position
- Tool-free element servicing
Properties
- Filtration efficiency: ≥ 99.99 % (ISO 5011)
- Operating temperature: −35 °C to +90 °C (peaks +110 °C)
- Airflow range: 0.8 – 4.4 m³/min @ 15 mbar
ViroClean
ViroClean is engineered for marine engines, generator sets, and installations exposed to salt, spray, or moisture.
It features a washable or replaceable foam element (30 ppi) that ensures long-term reusability, corrosion resistance, and minimal maintenance — ideal for coastal or humid industrial environments.
Key Advantages
- Washable or replaceable foam element
- Direct installation — no housing required
- Corrosion-resistant, long-life design
- Sustainable and reusable solution
Properties
- Operating temperature: −35 °C to +110 °C (peaks +130 °C)
- Airflow range: 4.2 – 53.0 m³/min @ 20 mbar
ViroSoft
ViroSoft is a compact, one-way air cleaner optimized for small engines, compressors, and generators — especially in high-vibration or pulsating environments (1–3 cylinders and more).
Its elastic polyurethane body absorbs shock and maintains a reliable seal, even under dynamic conditions. Lightweight, flexible, and easy to install, ViroSoft offers high performance with simple, tool-free replacement after service life.
Key Advantages
- Designed for high-pulsation environments
- One-way single-stage configuration
- Direct installation, no bracket required
- Operates in any position
- Custom sizes available on request
Properties
- Filtration efficiency: ≥ 99.99 % (ISO 5011)
- Operating temperature: −35 °C to +85 °C (peaks +100 °C)
- Airflow range: 3.4 – 9.8 m³/min @ 20 mbar
ViroLite
ViroLite is a high-airflow, one-way single-stage air cleaner designed for large engines, compressors, generator sets, and marine systems operating in light to medium dust environments.
Its rigid, compact construction ensures low pressure drop, extended filter life, and easy integration without brackets or housings. ViroLite is available in multiple configurations with or without integrated housing. Selected models feature a service-indicator port directly on the filter cover for convenient performance monitoring.
Key Advatntages
- One-way, disposable single-stage air cleaner
- High airflow in compact footprint
- Service-indicator port available on selected models
- Direct installation — no bracket or housing required
- Mountable in any position
- Custom sizes available on request
Properties
- Filtration efficiency: ≥ 99.99 % (ISO 5011)
- Operating temperature: −35 °C to +85 °C (peaks +100 °C)
- Airflow range: 3.0 – 109 m³/min @ 20 mbar
