Replacement for Filtermart 51891 Hydraulic Filter Element
$71.81
Engineered filtration that provides OEM reliability—an excellent value.
Proudly Made in America with ISO certified manufacturing, SONA’s direct replacement for the Filtermart 51891 element offers trusted performance and engineered quality, all while fitting seamlessly into your existing system.
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Our Filtermart 51891 Replacement Filter
Our Filtermart 51891 replacement hydraulic filter is a guaranteed direct replacement in form, fit, and function. This means the filter will fit and you should expect performance to be equal to or greater than the OEM filter. Made in America.
Filtration Media for the Filtermart 51891 direct interchange
Our filter media is backed by ISO 16889 multi-pass testing and other ISO/SAE test protocols and the filter is produced in an ISO Certified manufacturing facility. An ISO Certified manufacturing facility is all about quality control, consistency, responsibility, and being true to the design. Optimized media is used for fine filtration, just like the Filtermart 51891 hydraulic filter to be replaced. Our filters use the optimal amount of media and pleats to ensure high dirt-holding capacity. The correct number and design of pleats in the element will give you the lowest initial pressure drop. Therefore the filter will take longer to reach its change-out pressure drop which is usually 25 PSID.
Micron Rating for the Filtermart 51891 cross
This Filtermart 51891 hydraulic filter replacement element is beta-rated. The filter performance is outstanding.
- 5 Micron; B5 = 200, B7.7 = 1000
Filter Collapse Pressure for the Filtermart 51891 cross reference
A filter collapse pressure of 435 PSID Collapse means that if the filter is completely clogged and the build up of pressure reaches or surpasses 435 PSID Collapse the filter may collapse and allow contamination downstream. Please use a satisfactory safety factor for the filter.
Compatible Fluids
This filter is compatible with the following fluids but pressure drop will vary depending on viscosity and temperature:
- Hydraulic Fluid and Machining Fluids
- Diesel and other fuels
- Lubricating Oils and Synthetic Lubricants
- Turbine and Compressor Lube Oils … And many more fluids
Visit the links below for more helpful information.
Our hydraulic filter is indicated as a replacement for Filtermart 51891 and is not manufactured by or affiliated with the OEM or Brand listed. Part numbers and names are used for cross reference only. The element may vary from the image displayed on the left.







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