LENGE PES Pleated Filter Cartridge

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PES pleated filter cartridge is made by asymmetric gradient aperture membrane and PP components through advanced thermal bonding technology under Class 100 environment. The filter cartridge meets the technical requirements of GB/T34244-2017 of the People's Republic of China and without any adhesives or surfactants.


Material of filter element components:

Filter membrane: Hydrophilic PES membrane

Support/Drainage: PP

Core/Cover/End cover/End caps: PP

Sealed leads/Fins: PP with stainless steel inside

O-Ring: 222,226 silicon rubber etc.

Sealing technology: Thermal bonding without adhesives

Characteristics and features


  • Excellent high-temp resistance and extensive chemical compatibility.

  • All the compositions reach up to the requirement of the biological testing characteristics of USP Class 6 plastic products at 121℃ and the food contact materials listed in the relevant regulations of Chapter 21 of the Federal Regulations of the United States (CFR). They also conform to the requirements of China's "Standard for Hygienic Safety Evaluation of Equipment and Protective Materials in Drinking Water" (2001) for drinking water transport and distribution equipment.

  • The sampling of filter element successfully passed the bacterial challenge test required by regulations, LRV≥7.Integrity can be maintained after repeated high-pressure disinfection.

  • Each filter element should pass the integrity test before leaving the factory. The limitations of integrity testing were correlated with the results of bacterial challenge experiments.

  • It is manufactured under ISO 9001 and ISO 14001 systems and Class 100 environment.

  • Low protein adsorption to make sure the maximum recovery of target active ingredients.

  • The filter membrane has a gradient aperture structure for pre-filtration with large flow rate, low-pressure difference, and long service life.

  • Production and usage are traceable.


Technical specifications and operating parameters




Diameter: 2.75" (69 mm)

Length: 5"/10"/20"/30"/ 40" etc.



Filtration area



Single 10" filter element is about 0.65m²






Testing The filters without pre-washing. After 24 hours of immersion in water, the dissolution was less than 30 mg/10" filters.



Minimum Bubble Point of Integrity Test Data



0.1  μm: > 0.38  MPa in Water

0.22 μm : > 0.32  MPa in Water

0.45 μm: > 0.20  MPa in Water



Conditions of steam sterilization and hot water sterilization



Sterilization temperature: hot water 85℃

Steam 121 ℃/30 min, more than 15 times



Maximum pressure difference and temperature



Maximum operating temperature: 85℃/0.2 MPa;  25 ℃ (≥ 0.4 MPa)



Typical flow rate (Water, 20℃)


0.1 um: 4 lpm/0.01MPa/10"

0.22 um: 10 lpm/0.01MPa/10"

0.45 um: 15 lpm/0.01MPa/10"



Typical application


  • Sterilization filtration of LVP, fine needle, freeze-dried, and spray-dried drug.

  • Sterilization filtration and Mycoplasma removal filtration of animal serum, liquid medium, buffer solution, supplement water, etc..

  • Sterilization filtration of vaccines and genetically engineered products.

  • Sterilization filtration of eye drops, diagnostic reagents, etc.

  • Sterilization filtration of various process water and pharmaceutical water.

  • Terminal filtration of bottled water, draft beer, wine, yellow wine, soft drinks, syrups, etc. in the food and beverage industry.


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