Return Line Filters

Return Line Filters for Hydraulic Filtration

Maintain cleaner hydraulic oil and help protect your system from contamination with Flowfit’s range of return line filters for hydraulic filtration. Designed to filter hydraulic fluid as it returns from the working circuit back to the reservoir, return line filters help capture contaminants generated during normal system operation before they can re-enter the tank.

Our range includes in-line return filters and tank top return filters, providing flexible filtration options for hydraulic power packs, mobile equipment, industrial machinery and agricultural applications.

Effective return line filtration can help improve oil cleanliness, reduce component wear and support the long-term reliability of pumps, valves, motors, cylinders and other hydraulic equipment.

In-Line & Tank Top Return Filters

Different hydraulic systems require different return line filter configurations. Flowfit’s range is organised into two main categories to help you select the most suitable solution.

In-Line Return Filters
In-line return filters are installed directly into the hydraulic return pipework. They provide convenient filtration as oil flows back towards the reservoir and can be used where a separate external filter installation is preferred.

Tank Top Return Filters
Tank top return filters are mounted directly onto the hydraulic reservoir, allowing returning oil to be filtered as it enters the tank. Their reservoir-mounted design can provide a compact installation while making filter elements more accessible for routine inspection and replacement.

Why Return Line Filtration Is Important

Hydraulic oil can collect contamination as it circulates through pumps, valves, actuators, hoses and other system components. Wear particles, dirt and other contaminants can then be carried back towards the reservoir.

A correctly specified hydraulic return line filter captures this contamination before the oil re-enters the tank, helping prevent particles from repeatedly circulating through the hydraulic system.

Return filtration is widely used because the return side of a hydraulic circuit generally operates at a lower pressure than the main pressure line, allowing effective filtration without requiring the heavier construction associated with high pressure filter housings.

Common Applications for Hydraulic Return Filters

Return line filters are widely used across:

• Hydraulic power packs and power units
• Agricultural machinery
• Construction and plant equipment
• Mobile hydraulic systems
• Material handling machinery
• Industrial hydraulic equipment
• Manufacturing machinery
• Hydraulic presses
• Machine tools
• Automated production systems
• Hydraulic tanks and reservoirs
• General fluid power applications

They are particularly suited to systems where continuous contamination control is required before hydraulic oil returns to the reservoir.

Key Features of Return Line Filters

Depending on the filter type and specification selected, key benefits can include:

• Filtration of hydraulic oil returning to the reservoir
• Effective removal of dirt and wear particles
• Helps maintain hydraulic fluid cleanliness
• Supports protection of pumps, valves and other components
• In-line and tank-mounted configurations available
• Options for different hydraulic flow rates
• Range of connection sizes and filtration ratings
• Replaceable hydraulic filter elements
• Convenient servicing on tank top filter designs
• Suitable for industrial, agricultural and mobile hydraulic systems
• Helps reduce contamination-related component wear

Choosing the Right Hydraulic Return Line Filter

When selecting a hydraulic return filter, consider the system flow rate, maximum return pressure, filtration rating, port size, pressure drop and installation location.

An in-line return filter may be the preferred option where the filter needs to be installed within existing hydraulic pipework, while a tank top return filter can provide a compact reservoir-mounted solution with convenient access for maintenance.

Correct sizing is important to ensure the filter can accommodate the maximum return flow without creating excessive back pressure within the hydraulic circuit.

Flowfit also supplies pressure filters, suction filters, last chance filters, hydraulic filter elements and other filtration components for complete hydraulic contamination control.

Order Hydraulic Return Line Filters with Confidence

With a wide choice of hydraulic return line filters, in-line return filters and tank top return filters available, Flowfit makes it easier to maintain clean hydraulic oil and protect your system from damaging contamination. Our filtration products are carefully selected to provide reliable performance, effective filtration and excellent value for money.

For technical support or product advice, contact Flowfit on 01584 876 033 or email sales@flowfitonline.com.