Hydraulic systems rely on clean fluid to transmit power efficiently. Any contamination can lead to:
- Reduced performance
- Increased component wear
- Frequent breakdowns
- Costly repairs and downtime
Effective filtration protects valves, pumps, cylinders, and seals—helping extend the lifespan of the entire system.
Types of Hydraulic FiltersHydraulic systems use multiple types of filters, each placed strategically to catch different contaminants throughout the system. Here’s a breakdown:
- Suction Filters
- Location: In the reservoir, before the pump.
- Purpose: Prevents large contaminants from entering the pump.
- Note: Usually coarse filters; not meant for fine filtration.
- Return Line Filters
- Location: On the return line from the hydraulic circuit to the reservoir.
- Purpose: Captures contaminants before they re-enter the tank.
- Popular choice for general protection and ease of access.
- Pressure Line Filters
- Location: Downstream from the pump, before sensitive components.
- Purpose: Removes fine contaminants under high pressure.
- Use: Critical for protecting precision valves and actuators.
- Off-line / Kidney Loop Filters
- Location: Separate filtration circuit running parallel to the main system.
- Purpose: Continuous fluid filtration and conditioning without affecting system performance.
- Ideal for: Systems where high cleanliness is essential.
- Breather Filters
- Location: On reservoir air inlets.
- Purpose: Prevents airborne contaminants from entering the hydraulic tank.