Every movement in the hydraulic system causes the volume in the tank to change, with ambient air taken in (“inhaled”) or air inside the take being expelled (“exhaled”). Without efficient breather filters, dust particles and moisture can enter the fluid directly. HYDAC breather filters and adsorption dryers act as a protective shield: the breather filters clean the incoming air, and the adsorption dryers actively remove moisture. This prevents corrosion on the inside of the tank and stops chemical decomposition of the oil (oxidation). This increases system reliability, while drastically reducing the costs for oil change and component wear.
Construction:
The distinctive feature of the desiccant breather dryers BDE is that it has two separate chambers. These chambers are possibly fillable with two desiccants, which in combination increase total water retention (two-stage dewatering). As an option, and as a special protection of the desiccant, four valves are built into the bottom of the unit. So then, during system shutdown, it will avoid saturation of the desiccants. A check valve is available as an option to prevent exhaust air from the tank/ transmission from flowing back through the desiccant. This means that there is a protection of the desiccant from oil mist and there is no re-drying of the exiting air.
The built-in pleated air filter element (absolute filtration of particles > 2 µm) provides the filter with a very high contamination retention capacity (26g). In order to ensure reliable function, replacement of the entire cartridge is necessary. When the change of the filter is due, the colour changes from dark red to light orange.
- BDE 200 X 2 W 0.0 Material-No. 1299653
- BDE 400 X 2 W 0.0 Material-No. 1299654
- BDE 400 G 2 W 1.0 /-RV0.003Material-No. 1299637
- BDE 1000 X 2 W 0.0 Material-No. 1299655
- BDE 400 G 2 UBM 1.0 /-RV0.003 Material-No. 1310333
- BDE 400 G 2 UBM 1.0 Material-No. 1310335
- BDE 400 G 2 W 1.0 Material-No. 1300850
- BDE 400 G 2 W 1.0 /-RV0.003 Material-No. 1299637
- BDE 400 N 2 UBM 1.0 /-RV0.003 Material-No. 1315615