Pall Lubricating Oil Filter Element HC4704

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PALL-HC4704 series—HC4704FKP8H

Filtration accuracy: 0.01-500μm

working temperature: -30~115℃

Maximum working pressure: 420 kg

pressure difference: minimum 0.2MPa

Filter material: glass fiber, metal mesh, filter paper, sintered felt, sintered mesh, powder sintered, polypropylene;

Application areas: steel mills, power plants, aluminum plants, natural gas, shipbuilding, chemicals, textiles, sewage treatment, restaurant fume, mining, paper mills, subways, shield machines, trains, airplanes, engineering vehicles, construction machinery and various industrial plants And many other fields;

Filter media: hydraulic oil, water, air, butter, transformer oil, glue, engine oil, diesel, gear oil, cooling circulating oil, concentrated grease, oil fume, heavy oil, fuel oil, oil-water separation, oil-gas separation, lubricating oil, mineral oil, natural gas , Dust, oil mist, gear oil, cutting fluid, air compressor oil, aviation kerosene, water-glycol, transformer oil, fuel, coolant, bearing lubricant, quenching oil, silicon oil (industrial), gasoline, chemical industry Liquid, industrial phosphate...

HC4704 series—HC4704FKP8H Pall filter element introduction:
The pall filter element should be installed at the suction port of the pump:

A surface-type oil filter is generally installed on the suction line of the pump to filter out larger foreign particles to protect the hydraulic pump. In addition, the filter capacity of the oil filter should be more than twice the pump flow rate, and the pressure loss should be less than 0.02MPa.

(1) The pall filter element is installed on the outlet oil circuit of the pump:

The purpose of installing the oil filter here is to filter out pollutants that may invade valves and other components. Its filtration accuracy should be 10-15μm, and it can withstand the working pressure and impact pressure on the oil circuit, and the pressure drop should be less than 0.35MPa. At the same time, a safety valve should be installed to prevent clogging of the oil filter.

(2) The pall filter element is installed on the oil return line of the system:

This installation acts as an indirect filter. Generally, a back pressure valve is installed in parallel with the filter. When the filter is blocked and reaches a certain pressure value, the back pressure valve opens.

(3) The pall filter element is installed on the branch oil circuit of the system.

(4) Pall filter element separate filtration system:

Large hydraulic system can be specially equipped with a hydraulic pump and oil filter to form an independent filter circuit. In addition to the oil filter required by the entire system, the pall filter element hydraulic system is often used in some important components (such as servo valves, precision throttle valves, etc.) A special oil filter is installed separately in front of the to ensure their normal operation.


Technical Parameters
Technical Parameters


Performance characteristics
Medium: general hydraulic oil, phosphate grease hydraulic oil, emulsion, water-hexanediol

Material quality: glass fiber filter paper-BN stainless steel woven mesh-W wood pulp filter paper-P stainless steel sintered mesh-V

Filtration accuracy: 1μm ~ 100μm

Working pressure: 21bar-210bar

Working medium: general hydraulic oil, phosphate grease hydraulic oil, emulsion, water-glycol

Working temperature: -30℃～+110℃

Sealing material: fluorine rubber ring, nitrile rubber


Filter element testing standard:
(1) ISO 2941 filter element-test method for filter element rupture resistance

(2) ISO 2942 filter element-hydraulic filter element structural integrity test method

(3) ISO 2943 Filter Element-Test Method for Compatibility of Hydraulic Filter Element Material and Liquid

(4) ISO 3723 filter element-end-to-end compliance test

(5) ISO 3724 filter element-determination of fatigue characteristics

(6) ISO 3968 filter element-differential pressure flow characteristics

(7) ISO 4572 filter element-multiple pass method to determine filter characteristics


Main application areas:
1. It is used to filter the hydraulic system of rolling mills and continuous casting machines and filter various lubricating equipment.

2. Petrochemical: Separation and recovery of products and intermediate products in the process of oil refining and chemical production, liquid purification, purification of magnetic tapes, optical discs and photographic films in manufacturing, and particle removal and filtration of oilfield injection water and natural gas.

3. Textile: mixing liquid, air hanging, wetting, operating pressure accumulator, spraying liquid, spraying system, infusion. The polyester melt is purified and uniformly filtered during the drawing process, the air compressor is protected and filtered, and the compressed gas is degreasing and dewatering.

4. Electronics and pharmaceuticals: pre-treatment filtration of reverse osmosis water and deionized water, pre-treatment filtration of washing liquid and glucose.

5. Mechanical processing equipment: lubrication system and compressed air purification of papermaking machinery, mining machinery, injection molding machines and large precision machinery, dust recovery and filtration of processing equipment and spraying equipment.

6. Railway internal combustion engines and generators: filtration of lubricating oil and engine oil.

7.Various hydraulic oil filters for automobile engines, engineering machinery, ships, and trucks.

8. Thermal power and nuclear power: oil purification of gas turbines, boiler lubrication systems, speed control systems, bypass control systems, feed water pumps, fans and dust removal systems.

9. Shipbuilding: painting, riveting hammer, sandblasting, welding, O2, CO2 by air separation

10. Glass: blowing bottle and glassware, blowing lamp tube and electron tube, combustion gas, transmission of raw materials, glass etching and polishing and drilling, conveying glass, pneumatic control, vacuum hanging plate; air separation manufacturing N2: float glass

11. Oil refinery: combustion gas, draining and cleaning oil circuits, lifting and elevators, drive control systems, catalyst recirculation, sandblasting, painting

12. Electronic precision: painting, assembly, cleaning, electroplating

13. Fiber: for automatic machinery, suction gun, drying, dyeing

14. Casting: iron ladle positioning, cleaning equipment, sand conveying, driving pneumatic tools, sanding machine, grinder, hoist and elevator, pneumatic pick, tamping machine, steel brush, sand blasting, sand screening, mud blasting core

15. Forging: blowing oxide scale, furnace door air curtain, hoisting hoist and elevator, driving bending and straightening machine, driving clutch brake and clamping device, driving forging hammer, fuel burner

16. Sheet metal: mixing solution, transporting chips, jet cleaning, driving packaging press, driving platen chuck clutch and positioner, pneumatic tool, finishing hammer, pneumatic pick, drill, grinder, hoist and elevator, combination tool , Riveting machine, sandblasting, lubricant spraying, paint spraying, container leak detection