Industrial Hydraulic Filters & Spin-On Filters

Most hydraulic failures start small. A few particles of wear metal or a bit of moisture in the reservoir can score a pump or stick a valve. Catching contamination early costs far less than replacing components after damage is done. OFCO has focused on fluid power filtration from its Coshocton, Ohio, headquarters since 1945. Our SP Series spin-on filters are kept in stock for quick shipment, and our custom filters and strainers are manufactured in-house under an ISO 9001:2015-certified quality system.

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SP Series Spin-On Hydraulic Filters

Spin-on filters give dependable contamination control with simple element changes. The SP Series uses standard ported heads with bypass settings for suction or pressure service. Canisters take media from absolute-rated micro-glass to nominally rated cellulose and woven stainless steel mesh. A micro-glass element with water absorption is also available for moisture-prone systems. With a breather adapter, the same canister can serve as a tank breather.

SP Series Spin-On Hydraulic Filters

Why Choose OFCO Hydraulic Filters

OFCO has served the fluid power industry from Central Ohio for decades. Our SP Series spin-on filters are stocked and ready to ship, and our custom filters and strainers are fabricated and assembled in-house, which gives us direct control over quality and scheduling. That matters for industrial hydraulic filters, where a late or out-of-spec part can stall a production line or idle a machine in the field.

Our quality management system is ISO 9001:2015 certified and audited by a third party. For higher-volume customers, OFCO supports dock-to-stock shipping, JIT and Kanban programs, and safety stock, so replacement elements are on hand.

Applications & Industries

Hydraulic filtration systems protect pumps, valves, cylinders, and motors. OFCO filters, strainers, and breathers serve fluid power manufacturers, OEMs, distributors, and end users who build or maintain hydraulic equipment, including:

Construction and earthmoving equipment
Agricultural machinery
Mobile and industrial machinery
Manufacturing and plant equipment

SP heads come in suction and pressure versions, and the canister can double as a reservoir breather, so one product family covers several points in the same circuit.

Close-up of hydraulic fittings, hoses, and numbered valve levers on teal machinery

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Custom-Manufactured Filtration Solutions

Standard catalog parts don’t fit every design. OFCO builds custom filters and strainers to customer specifications in metals from aluminum and brass to stainless steel. Tooling, forming and welding all happen in-house, so we move from concept to production without outsourcing critical steps.

OFCO can provide:

APQP support from concept through final design
PPAP documentation and pre-production samples
Material certifications

For OEMs designing hydraulic oil filtration systems into new equipment, that means one partner from first samples through production runs, with automated marking for your branding.

Find the Right Filter for Your System

Whether you need a standard spin-on filter or a custom part built to your drawings, OFCO can help you match media, bypass settings, and materials to the job. Share your application details and quantities for a quote, or call 888-354-0291 or email info@ohfab.com.

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Frequently Asked Questions

What's the difference between absolute and nominal filter ratings?

An absolute rating comes from multi-pass testing and is expressed as a beta ratio: the number of particles of a given size upstream of the filter divided by the number that pass downstream. OFCO’s micro-glass SP elements have a beta ratio of 1,000, meaning they capture about 99.9% of particles at the size listed on each spec sheet. A nominal rating, used for the cellulose and wire mesh elements, gives an approximate particle size the media stops, without a tested efficiency figure.

Can a spin-on filter be used on the suction side of a pump?

Yes, with the right head. OFCO offers SP heads with a 5 PSI bypass for suction service and a 25 PSI bypass for pressure service. The low suction setting lets oil bypass a loaded element so the pump isn’t starved, and an optional vacuum gauge shows when it’s time for a change.

How do I know when to change a hydraulic filter?

Element life depends on how much contamination your system generates, so a fixed calendar interval can be misleading. A gauge gives a clearer signal. The SP Series accepts an optional pressure gauge for pressure setups and a vacuum gauge for suction setups.

How can I keep water out of hydraulic oil?

Moisture often enters through the reservoir because the tank draws in outside air as the oil level rises and falls. The SP Series offers a micro-glass element with water absorption, and the SP breather adapter turns a spin-on canister into a filtered reservoir breather.