Description
BPS Series Bypass Filters: Precision Filtration for High-Pressure Systems
The BPS series by :contentReference[oaicite:0]{index=0} offers an advanced bypass filtration solution, ideal for both original equipment (OEM) installations and retrofitting on existing systems. These filters are engineered to draw fluid directly from the high-pressure side of the hydraulic or transmission system, purify it, and return it to the tank—ensuring continuous cleanliness and extending component service life.
Operating Principle and Integrated Valve
The core of the BPS system is the integrated flow control valve. This pressure-compensated valve manages fluid intake from the main circuit, which can operate at system pressures between 12 and 420 bar (180…6200 PSI). Regardless of pressure fluctuations in the main system, the valve ensures a constant oil flow through the filter element, optimizing contaminant removal efficiency without significantly drawing power from the system.
Design Features and Models
Manufactured with an anodized aluminum housing, BPS filters are lightweight and corrosion-resistant, making them ideal for mobile applications. The range is available in two main models:
- BPS-1A (Single Housing): Designed for a maximum flow rate of 2.1 l/min (0.6 US GPM).
- BPS-2A (Double Housing): Equipped with two filter housings, doubling filtration capacity with a maximum flow rate of 4.2 l/min (1.1 US GPM).
Technical Specifications and Applications
BPS units are highly versatile and operate effectively across a wide range of conditions:
- System Pressure: From 12 to 420 bar.
- Viscosity: Suitable for fluids with viscosities between 20 and 160 cSt.
- Temperature: Operating range from -10°C (typical for mobile hydraulics) up to +80°C.
- Connections: Inlet G 1/4 (BSP) and outlet G 1/2 (BSP).
Filter Elements and Maintenance
The filters use replacement elements from the SRM-30 series, offering a wide selection of filter media for every requirement:
- Cellulose (H): 0.5 micron.
- Inorganic Glass Fiber (G): 1, 3, 5, 10, 20 micron.
- Water-Absorbing Elements (EA): 5 micron, essential for moisture removal and corrosion prevention.
Technical summary table of the main features of Stauff BPS Bypass Filters
| Feature | Value |
|---|---|
| Filter Type | High-Pressure Bypass Filter |
| Permissible System Pressure | 12 … 420 bar (180 … 6200 PSI) |
| Models & Max Flow Rate | BPS-1A (2.1 l/min) / BPS-2A (4.2 l/min) |
| Control Valve | Integrated, pressure-compensated |
| Housing Material | Anodized aluminum |
| Permissible Viscosity | 20 … 160 cSt |
| Operating Temperature | Up to +80°C |
| Connections | IN: G 1/4 (BSP) / OUT: G 1/2 (BSP) |
| Compatible Filter Elements | SRM-30 series (Cellulose, Glass Fiber, Water-Absorbing) |
| Seals | NBR (standard), FKM (optional) |