WCPES-Series WaterClear™ Grade Polyethersulfone

WCPES-Series High Purity WaterClear™ Grade Polyethersulfone Filter Cartridges are a value-oriented, reduced surface area choice for cost-effective, general-purpose membrane filtration. Designed in continuous lengths up to 30” segments* for excellent performance value. The highly retentive polyethersulfone membrane offers excellent flux density and low protein binding. The naturally hydrophilic membrane wets easily to allow maximum utilization of the entire surface. These features allow the WCPES-Series to provide the fine performance of PES membrane at a competitive price.
Designed to tolerate repeated hot water sanitization and in-situ steam sterilization cycles. Manufactured in a clean-room environment to maintain high standards of purity and cleanliness.


Operating Conditions

  • Change Out ΔP (recommended) 35 PSID
  • Temperature (max) 
    176˚F (80˚C)
  • Differential Pressure (max)
    50 PSID (3.4 bar) at 68˚F (20˚C)


  • Deionized Water Systems
  • General-Use Water Filtration
  • Liquid Clarification
  • Chemical Filtration

Performance Chart

*All data is based on absolute rated medias. Nominally rated medias will result in a pressure drop reduction of approximately 10%.

Construction Materials

  • Membrane: Polyethersulfone
  • Support Media: Polypropylene
  • End Caps: Polypropylene
  • Center Core: Polypropylene
  • Outer Support Cage: Polypropylene
  • O-Rings/Gaskets: Buna, EPDM, Silicone, Teflon® Encapsulated Viton®, Viton®, Teflon® Encapsulated Silicone


  • Length: 10 to 30 inches (25.4 to 101.6 cm) nominal
  • Outside Diameter: 2.70 inches (7.0 cm) nominal


Filtered Hot Water: 80˚C for 30 min.
Steam Sterilization: 121˚C for 30 min., multiple cycles
Chemicals: Cartridges are compatible with most chemical sanitizing agents.
Note: Stainless steel insert option required for all cartridges being hot water sanitized or steam sterilized.


All polypropylene components meet the specifications for biological safety per USP Class VI – 121˚C for plastics.

Food Safety Compliance

Materials of construction comply with FDA regulations for food and beverage contact use as detailed in the US Code of Federal Regulations, 21CFR. Materials used to produce filter media and hardware are deemed safe for use in contact with foodstuffs in accordance with EU Directives 2002/72/EC, 1935/2004, and/or 10/2011.