Safe Breathing Air & Perfect Surfaces: The Sundström SR 99-2 Filter Regulator in Professional Use
Anyone who stands in the spray booth or coats surfaces every day knows: compressed air is not automatically breathing air. Particles, oil mist, or condensation not only ruin the paint finish but also pose a massive risk to your health. The Sundström SR 99-2 filter regulator with automatic drain reliably converts harsh compressor air into highly purified, breathable air. In this guide, you will learn how to optimally integrate the system into your workflow, prevent errors, and maximize service life.
Product Overview & Core Technical Components
| Feature / Variant | Details & Specifications (SR 99-2) |
|---|---|
| Main Application | Purification of compressed air for respiratory protective devices (e.g., SR 200 RDS) and compressed air tools. |
| Filtration Stages | 2-stage: Highly efficient particle filter (SR 292) + integrated active carbon section for gases and odors. |
| Drainage System | Automatic condensate drainage upon pressure drop or saturation – protects downstream filter media. |
| Max. Flow Rate | Designed for up to 3 users simultaneously (or respiratory protection + spray gun in parallel). |
Equip Your Respiratory Workplace Professionally Now
Secure the Sundström SR 99-2 filter regulator with automatic drain for clean air according to EN 12021.
Buy Sundström SR 99-2 OnlineRecommended Operating Parameters (Guideline Values)
Note: The following values are based on standard configurations and manufacturer documentation. They serve as general guidelines and must be adjusted depending on the hose length and the connected mask.
| Parameter | Recommended Guideline Value |
|---|---|
| Inlet Pressure (Maximum) | 6 to 10 bar (Do not operate above 10 bar) |
| Working Pressure (Adjustable) | 4 to 7 bar (Depending on breathing hose specifications) |
| Min. Airflow per Mask | 150 l/min to 240 l/min (Observe safety lower limit!) |
| Operating Temperature | +5 °C to +40 °C (Prevent freezing hazard of condensate) |
Professional Workflow: Commissioning and Safe Operation
- Verify Wall Mounting: Secure the filter regulator vertically on a vibration-free wall. The automatic drain must point straight down to ensure flawless drainage of the condensate.
- Flush the Supply Line: Before connecting the system, thoroughly blow out the compressed air supply line to prevent coarse rust or assembly debris from entering the device.
- Pressure Gauge Check: Turn on the compressed air slowly. Adjust the pressure using the control knob at the top of the housing until the integrated gauge displays the desired working pressure (e.g., 5 bar).
- Connect Respiratory Protection: Connect the safety compressed air hoses to the outlet couplings. Check that the couplings audibly click into place and are completely airtight.
- Flow Test Under Load: Put on the respiratory mask and activate the mask's regulating valve. The pressure on the SR 99-2 must not drop below the minimum pressure prescribed by the manufacturer under breathing load.
Troubleshooting
Measures: Check if the pre-filter is blocked or if the main SR 292 filter needs replacement. Also, ensure that the compressor provides sufficient air volume output (l/min) and that the inlet pressure remains stable.
Measures: The automatic valve often only closes once a minimum pressure of approx. 1 to 1.5 bar is reached. Increase the system pressure abruptly. If this does not help, clean the drain area of particles blocking the seal.
Measures: Leave the work area immediately! The active carbon layer of the filter is fully saturated. An immediate replacement of the filter element is mandatory to prevent health hazards.
Measures: Check the functionality of the float inside the drain valve. If the condensate is heavily contaminated with thick compressor oil, the mechanism can stick and must be cleaned manually or replaced.
Maintenance Schedule for Maximum Occupational Safety
- Daily: Visual inspection of the housing for mechanical damage and checking the automatic drain for smooth movement.
- Weekly: Manual triggering of the condensate drain (if residue is stuck) by pressing the valve pin.
- Monthly: Measurement of static vs. dynamic pressure on the gauge to detect filter clogging early on.
- Semi-annually / Every 6 Months: Mandatory replacement of the SR 292 combination filter, as the absorption capacity of the active carbon ages chemically regardless of actual usage.
- Annually: Complete disassembly of the filter housing, O-ring inspection, and cleaning of the interior with warm water (do not use solvents!).
Frequently Asked Questions (FAQ)
Q: Can the SR 99-2 filter carbon monoxide (CO) or carbon dioxide (CO2)?
A: No. The filter regulator removes particles, vapors, and oils. However, it does not correct oxygen levels or filter out toxic gases like CO/CO2. Ensure that the compressor's air intake is placed in an absolutely clean environment.
Q: How do I know when the filter needs to be replaced?
A: Either by a noticeable pressure drop at the tool/mask (particle saturation) or by the occurrence of odors (active carbon saturation). At the very latest, replace it after 6 months.
Q: How many painters can be connected at the same time?
A: The system features connections for up to 3 respiratory protection components. Please keep the maximum air delivery capacity of your workshop compressor in mind.
Q: Is the automatic drain valve prone to wear and tear?
A: In cases of extremely oily or rusty compressed air, the mechanics can stick. Installing a coarse pre-filter upstream minimizes this wear to zero.
Q: Can the device be mounted in frost-prone outdoor areas?
A: No. If the separated condensate freezes inside the housing or valve, the automatic mechanism will be irreparably damaged. Operation should always take place above +5 °C.
Conclusion
The Sundström SR 99-2 filter regulator is the protective link between the compressor and the user. Thanks to its robust design, highly efficient two-stage filtration, and convenient automatic drainage system, it guarantees uncompromising safety during coating tasks. Anyone looking to minimize downtime, achieve perfect finishes, and protect their lungs sustainably is investing in a top-class professional tool with this system.
