Twin-barrel return filter – online change, ≥99% efficiency.

SRFB Twin-Barrel Direct Return Oil Filter | Product Update

Product Overview

The SRFB twin-barrel direct return oil filter features a direct return design with a compact structure, 

making filter element replacement and tank oil filling quick and convenient. The twin-barrel configuration

 supports online switching, allowing filter element replacement or tank maintenance without system shutdown,

 significantly reducing downtime and improving equipment availability.

Each filter head is equipped with two M18×1.5 oil ports, and the contamination indicator can be flexibly installed 

at either location to accommodate different system layout requirements.

Key Features & Benefits

· Direct Return Design for Easy Maintenance – Return oil flows directly back to the tank, simplifying filter element

 replacement and oil filling procedures without complex disassembly.

· Twin-Barrel Structure for Online Switching – The dual-barrel design enables filter element replacement without 

interrupting system operation, ensuring continuous production and higher efficiency.

· Diffuser for Bubble Reduction – A diffuser is installed at the end of the return oil cylinder, allowing return oil to 

flow smoothly into the tank with minimal bubble generation. This reduces air re-entry and minimizes disturbance 

to settled contaminants, helping maintain tank bottom cleanliness.

· High-Performance Filter Media – The filter element is made of advanced chemical fiber material, offering high

 filtration precision, large oil flow capacity, low initial pressure drop, and high contaminant-holding capacity.

· High Filtration Efficiency – Filtration accuracy is rated by filtration ratio, with β₃.₅, β₁₀, β₂₀ > 100 and filtration 

efficiency η ≥ 99%, in full compliance with ISO standards.

· Flexible Indicator Installation – Each filter head features two M18×1.5 ports, allowing the contamination indicator 

to be installed at the most convenient location for system integration.

Technical Specifications

Parameter Specification

Product Series SRFB

Configuration Twin-barrel, direct return

Filter Element Material Advanced chemical fiber

Filtration Ratio β₃.₅, β₁₀, β₂₀ > 100

Filtration Efficiency η ≥ 99%

Indicator Port M18×1.5 (2 ports per filter head)

Installation Type Direct return (top-mounted on tank)

Compliance ISO standards

Application Fields

The SRFB twin-barrel direct return oil filter is widely used across various industries:

1. Metallurgy – Filtration for hydraulic systems in rolling mills, continuous casting machines, and various lubrication 

equipment.

2. Petrochemical – Separation and recovery of products and intermediates in refining and chemical processing; particle

 removal filtration for oil well injection water and natural gas.

3. Textile – Purification and uniform filtration of polyester melt during drawing; air compressor protection filtration; 

removal of oil and water from compressed gas.

4. Electronics & Pharmaceutical – Reverse osmosis water treatment, deionized water filtration, washing liquids, 

and glucose pre-treatment filtration.

5. Thermal & Nuclear Power – Oil purification for gas turbines, boiler lubrication systems, speed control systems, 

bypass control systems, feed water pumps, fans, and dust removal systems.

6. Mechanical Processing Equipment – Lubrication systems and compressed air purification for paper machinery,

mining equipment, injection molding machines, large precision machinery, tobacco processing equipment, 

and spraying equipment.

Summary

The SRFB twin-barrel direct return oil filter combines compact design, high-efficiency filtration, and online

 maintenance capability. With advanced chemical fiber filter media, ISO-compliant filtration performance, 

and flexible indicator installation, it provides reliable contamination control for hydraulic and lubrication 

systems across a broad range of industries.

Contact Us

For detailed technical data, model selection assistance, or customized configurations, please contact our technical team. 

We are ready to help you find the right filtration solution for your application.