FILTREC D721G03A replacement oil filter element 3micron high-precision pressure oil pipeline filter imported fiberglass lubrication station hydraulic station

Core basic parameters of the product

-Filter element model: D721G03A (domestic substitute)

-Filtering accuracy: 3 μm, β (c) ≥ 200, high-precision solid particle interception

-Adaptive filter: FILTREC D721 series high-pressure pipeline filter

-Applicable media: mineral hydraulic oil, gear lubricating oil, anti-wear hydraulic oil

-Maximum collapse pressure difference: 21 bar, able to withstand instantaneous pressure difference impact in high-pressure pipelines

-Working temperature range: -20 ℃ to+110 ℃

-Suggest replacing the pressure difference: 0.2MPa

-Oil flow direction: external inlet and internal outlet, standard flow direction of high-pressure filter

-Structural form: Ultra fine multi-layer gradient fiberglass filter layer, high-strength metal internal and external support skeleton

Detailed introduction of product materials

The 3 μm high-precision filter element has fine fibers and optimizes the overall structure for high-pressure alternating working conditions, avoiding problems such as filter material damage, fiber detachment, and skeleton flattening under high pressure.

-Filter material: Ultra fine multi-layer gradient resin cured fiberglass filter material, with the outer layer intercepting larger particle impurities and the inner layer achieving 3 μ m precision filtration; The filter material has undergone high-pressure fluid flushing testing, and the fibers are firmly bonded without fiber detachment, preventing secondary oil pollution; The gradient structure enhances the pollutant holding capacity and compensates for the weak pollutant holding capacity of high-precision filter cartridges.

-Internal and external support skeleton: thickened galvanized punched metal skeleton, strong compressive performance, resistant to high-pressure differential impact, preventing filter cartridge from being flattened and ineffective; High porosity, balancing the flow resistance caused by high precision, and controlling the initial pressure difference of the filter element.

-Sealing parts: NBR nitrile rubber sealing ring is standard configuration, which is oil resistant and anti-aging, ensuring tight sealing of filter element seat and avoiding oil bypass; Under high temperature and special medium conditions, FKM fluororubber sealing rings can be upgraded.

-End caps and bonding process: metal machined end caps, high-temperature hot pressing bonding process, high bonding strength, and resistance to delamination and cracking in high-pressure alternating environments; The installation size is exactly the same as the original, and it is easy to disassemble and exchange.

Main applicable scenarios and industries

D721G03A is a high-pressure high-precision pressure pipeline filter element installed in the downstream high-pressure oil circuit of the oil pump, and is not recommended for use as a return oil filter.

-Precision metallurgical equipment: servo controlled rolling mills, high-pressure oil purification for continuous casting equipment, ensuring the stability of servo systems.

-Wind power industry: high-precision oil filtration for gearbox lubrication system, delaying gear and bearing wear.

-Power industry: high-precision filtration for hydraulic oil stations and lubricating oil stations in power stations.

-High end complete equipment: hydraulic system protection with strict requirements for oil cleanliness.

-Maintenance support: Replacement of spare parts for FILTREC D721 filter equipment.

Core advantages of the product

1. High precision gradient filter material, balancing accuracy and dirt absorption: 3 μ m precision filtration, gradient layered dirt absorption, improves the pain point of easy clogging of high-precision filter cartridges, and extends the service life of filter cartridges.

2. High pressure reinforced structure, suitable for alternating pressure conditions: thickened metal skeleton combined with high-pressure fiberglass filter material, capable of withstanding frequent pressure drop impacts in high-pressure pipelines, and structurally reliable.

3. Guarding high-value precision components and reducing failure rates: effectively filtering out small hard particles, reducing wear on servo valves, plunger pumps, and bearings, and lowering equipment downtime maintenance costs.

4. Controllable initial pressure difference without affecting system oil supply: Optimize the folding arrangement of filter materials and skeleton openings, while ensuring a precision of 3 μ m, to minimize flow resistance as much as possible.

Frequently Asked Questions (FAQ)

Q1: Can the D721G03A replacement filter directly replace the FILTREC original filter?

A: It can be directly replaced in situ, and its size, sealing, pressure resistance, and 3 μ m filtration accuracy are comparable to the original D721G03A filter element.

Q2: Will the service life of a 3 μ m high-precision filter be very short?

A: Gradient filter materials can improve the pollutant holding capacity, but high-precision filter cartridges are more prone to blockage by large particle impurities. It is recommended that the system perform front-end pretreatment and monitor the pressure difference on time.

Q3: What is the reason for the rapid increase in pressure difference?

A: If the total amount of impurities inside the system is high or the oil is oxidized, it is necessary to monitor the oil status and replace the filter element in a timely manner when the pressure difference reaches 0.2 MPa.

Q4: Apart from FILTREC filters, what other oil filtration related products do you have?

A: Our factory has a complete line of oil filtration products, which can meet the purification needs of industrial oil products under all working conditions. In addition to the full range of PALL / HYDAC replacement oil filter elements, we also specialize in various imported and domestically renowned brand oil filter elements and filters, including the Leemin series hydraulic filter. We also sell the LYC-A, LYC-B and other series of movable oil filters, which can meet the needs of online filtration and offline fine oil filtration of equipment. In addition, we also produce customized oil coalescence dehydration filter elements to achieve integrated filtration of hydraulic oil and lubricating oil for water and impurities removal, providing one-stop solutions to industrial oil filtration problems.

Q5: What other filtering categories are included in your factory's main business?

A: Our factory is a one-stop manufacturer of industrial filtration products, with our main business covering four core filtration areas and fully adapting to industrial filtration needs. We specialize in industrial oil filtration, industrial water filtration, natural gas filtration, and industrial air filtration. We can produce customized imported replacement filters, domestic standard filters, and complete sets of filtration equipment for various categories.

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