Important application of epoxy resin coated metal filter in the production of hydraulic filter element

Important applications of epoxy coated wire mesh in the production of hydraulic filter elements

1. Filter element skeleton/support mesh:

Function: Replace the traditional punched metal cylinder or ordinary metal woven mesh as the internal or external support skeleton of the filter material (such as glass fiber filter paper, metal fiber felt, synthetic fiber felt).

Advantages: The coating provides excellent oil resistance, water resistance, and chemical corrosion resistance, preventing the support skeleton from rusting and peeling after long-term immersion in hydraulic oil (especially containing water, additives or acidic substances produced after oxidation), avoiding secondary pollution (rust residue), and enhancing the overall structural strength and anti-crushing ability.

2. Main filter layer (metal mesh filter element):

Function: Directly stack, wind or sinter multiple layers of epoxy coated metal mesh with different mesh sizes to make a filter element as the core filter medium.

Advantages: Suitable for occasions that require high precision, high rigidity, and can be repeatedly cleaned and regenerated (such as high-pressure pipeline filtration, return oil filtration). The coating can significantly improve the corrosion resistance and wear resistance of the metal mesh itself.

3. End cover connector/center tube sealing surface:

Function: Used for the joint or sealing surface between the end cover and the center tube of the filter element.

Advantages: The coating provides good sealing and corrosion resistance, preventing leakage or strength loss due to corrosion at the joint.

4. Coarse filter/protective layer:

Function: Wrap a coarse epoxy-coated metal mesh on the outer layer of the precision filter material (such as filter paper).

Advantages: Pre-intercept large particle pollutants, protect the internal fine filter layer from being blocked or punctured prematurely, and extend the life of the fine filter element. The wear resistance of the coating makes it more durable under high-pressure oil flushing.

The role and core advantages of epoxy-coated wire mesh in hydraulic filter elements

1. Extreme oil and corrosion resistance:

Solve pain points: Hydraulic oil contains water, additives (such as ZDDP anti-wear agent), and oxidation products (acidic substances) that will corrode ordinary carbon steel skeletons/filters, producing rust particles that pollute the system.

Advantages: Epoxy resin coating perfectly isolates metal substrate from corrosive media, completely eliminates the risk of metal corrosion, ensures the cleanliness of hydraulic oil, and protects precision hydraulic components (pumps, valves, cylinders).

2. Enhance wear resistance and scouring resistance:

Solve pain points: High-speed hydraulic oil carries hard particles and continuously scours the surface of the filter. Ordinary metal mesh may wear and deform or the surface finish decreases, resulting in reduced dirt holding capacity.

Advantages: Epoxy coating has high hardness and good toughness, which significantly improves the ability of mesh materials to resist particle scouring and friction, maintains the stability of mesh shape and smooth surface, and extends the service life of filter elements under particle-containing conditions.

3. Improve dirt holding capacity and anti-clogging:

Solve pain points: Ordinary metal meshes are prone to adhere to sludge and colloid, resulting in pore blockage and rapid pressure difference increase.

Advantages: The surface of epoxy coating is smooth and chemically inert, with excellent anti-adhesion and anti-scaling properties. Pollutants are not easy to adhere and are more likely to be carried away by the oil flow, delaying the rise of pressure difference, increasing dirt holding capacity, and reducing replacement frequency.

4. Improve structural strength and crush resistance:

Solve pain points: Under high pressure impact, ordinary woven mesh or punched skeleton may deform and crush, resulting in filter material damage and failure.

Advantages: The coating fills the tiny gaps at the intersection of the metal wires, enhancing the integrity of the mesh. Metal wire + epoxy coating forms a composite reinforcement structure, which greatly improves the compressive strength (especially for multi-layer sintered mesh structure) and ensures structural integrity under high pressure difference.

5. Adapt to harsh working conditions:

Solve pain points: Hydraulic systems such as engineering machinery, ships, and mining equipment often operate in high temperature, high humidity, and multi-polluted environments, and have extremely high requirements for filter element materials.

Advantages: Combining the high temperature resistance of metal (the matrix can withstand the temperature of the hydraulic system) and the chemical protection of epoxy coating, it performs excellently in harsh environments such as high temperature, high humidity, salt spray, and chemical pollution.

6. Extend the service life of the filter element:

The advantages of epoxy coated wire mesh such as corrosion resistance, wear resistance, anti-blocking, and high strength work together to significantly reduce the risk of filter element failure, extend the replacement cycle, and reduce downtime maintenance time and spare parts costs.

Types of hydraulic systems suitable for epoxy coated wire mesh

This high-performance filter element is particularly suitable for hydraulic systems with extremely high requirements for reliability, durability, and oil cleanliness:

1. High-pressure hydraulic system: such as construction machinery (excavators, cranes), injection molding machines, and hydraulic punches, the working pressure is often > 20MPa.

2. Key equipment systems: aerospace, ship steering gear, wind power variable pitch system, nuclear power equipment hydraulic system, the consequences of failure are serious.

3. Harsh environment systems: offshore platforms (high salt spray), mining machinery (high dust, high humidity), metallurgical equipment (high temperature, high pollution).

4. Long-cycle maintenance system: scenarios where the filter element needs to have an ultra-long service life and reduce the maintenance frequency.

Epoxy resin coated wire mesh is one of the ideal materials for manufacturing high-performance, long-life, and high-reliability hydraulic filter elements. It uses epoxy coating to give the metal filter top-level oil corrosion resistance, excellent wear and scouring resistance, excellent anti-sticking and anti-blocking properties, and enhanced structural strength, which perfectly solves the problem of filter element failure caused by corrosion, wear, and blockage in hydraulic systems. Especially in hydraulic systems with high pressure, heavy load, harsh environment, or sensitive maintenance cycles, the use of such filter elements can significantly improve the system's cleanliness guarantee capability, extend component life, and reduce overall operation and maintenance costs. Dashang Wire Mesh specializes in the production and sales of epoxy coated metal wire mesh, with an annual supply capacity of 3,600 tons. If you are interested in the product, please contact us at sales@dswirecloth.com