Parker 12AT and 50AT Low Pressure Spin-On Hydraulic Filters are designed to protect critical hydraulic system components in low-pressure suction and return line applications. These compact, lightweight spin-on assemblies provide reliable filtration performance in mobile equipment, hydrostatic drives, industrial power units, and reservoir breather installations.

The 12AT and 50AT series are rated for operating pressures up to 150 psi (10.3 bar) and are suitable for use in both suction-side and return-line circuits. Disposable canister construction helps contain fluid during service, supporting clean, efficient filter change-outs. Filters are available in single- and double-length configurations to accommodate different service life and flow requirements.

Multiple filtration media options are offered to match system needs, including cellulose, synthetic microglass, and Par-Gel® water-absorbing media. Media selections allow users to balance efficiency, pressure drop, and water removal requirements. Parker spin-on filters are available with NPT or SAE straight-thread ports, optional element condition indicators, and multiple mounting configurations for installation flexibility.

Designed to improve system cleanliness and support reliable cold-start performance, Parker 12AT and 50AT spin-on filters offer a practical, service-friendly solution for low-pressure hydraulic filtration applications where consistent protection and ease of maintenance are required.

• Maximum operating pressure: 150 psi (10.3 bar)
• Nominal flow (single length): 12–35 GPM (45–132 LPM)
• Media options include cellulose, microglass, and water removal (Par-Gel)
• Filtration options from 3 to 25 µm (particulate), plus water removal option
• Operating temperature range: -40 to 225 °F (-40 to 107 °C)
• Port options: 12AT (SAE-12 or 3/4" NPT); 50AT (SAE-20 or 1-1/4" NPT)