Complete inline filtration for compressed air: the SDLH-SS Series
The SDLH-SS Series is a complete platform for compressed-air filtration: twelve inline housings and six cartridge grades covering the path from coarse prefiltration to ultra-fine coalescing and final adsorption. Selection and service are straightforward, and all key data are grouped in a single table for specification and ordering.
Design features relevant in the field
- Aluminum housings with a connection design that seals reliably during service.
- Stable cartridge support: internal aluminum ribs keep the element steady under pulsation and start/stop.
- Needle-felt drainage layer for better heat resistance and consistent coalescing.
- KTL cataphoretic coating inside and out for corrosion and chemical resistance
- Practical layout for wall mounting and multi-filter assemblies
From coarse to final filtration
| Type | Cut-off | Residual oil (ISO 8573-1) | Typical use | New-element Δp |
|---|---|---|---|---|
| Sintered bronze | 15 µm | — | Coarse prefilter for protection of downstream stages | 20 mbar |
| Prefilter | 3 µm | — | Fine solid filtration and removal of larger oil droplets | 10 mbar |
| Prefilter | 1 µm | — | High-efficiency removal of solids and aerosols before microfiltration | 20 mbar |
| Microfilter | 0.1 µm | < 0.1 mg/m³ | General-purpose coalescing filter for clean, dry air | 50 mbar |
| Microfilter | 0.01 µm | < 0.01 mg/m³ | Super-fine coalescing filter for critical, oil-free applications | 80 mbar |
| Activated carbon | — | < 0.005 mg/m³ | Final stage for odour and hydrocarbon vapour removal | 60 mbar |
Cartridge overview
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15 µm prefilter
Layers:
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3 µm prefilter
Layers:
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1 µm prefilter
Layers:
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0.1 µm prefilter
Layers:
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0.01 µm prefilter
Layers:
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Activated carbon
Layers:
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The image shows the media stack for each grade: sintered brass; non-woven with acrylic/cellulose fibres; borosilicate microfibres (depth + coalescing); activated carbon on borosilicate support.
One table for housings and cartridges
To make product selection simple, all filter housings and matching cartridges are listed together.
The table includes:
- Flow rate at 7 bar(g), 20 °C
- Thread size and dimensions (A–D, mm)
- Compatible cartridge codes
- Initial pressure drop and replacement rules
- Correction factors for 2–16 bar operation
Using the table
- Determine the required air flow for your application (Nm³/h at 7 bar(g), 20 °C).
- Select the housing with the corresponding nominal flow capacity and thread size (all housings rated 16 bar).
- Choose the cartridge grade according to the target ISO 8573-1 class or filtration stage.
SDLH-SS brings housings and elements together in one consistent range.
It is easy to specify, simple to service, and reliable for maintaining clean, dry compressed air in industrial systems.