Whatman™ Polycap TF

Product Information sheet

For research use only.
Not recommended or intended for diagnosis of disease in humans or animals.
Do not use internally or externally in humans or animals.

  • Venting
  • Gas filtration
  • Solvent filtration
  • Solvent resistant capsule
  • Autoclavable
  • PTFE membrane

Polycap TF filter devices are manufactured with rugged PTFE membrane and polypropylene housing. No glue, adhesives, metal, epoxy or other extraneous materials are used in construction. All seals are fused. This document provides general information on the products listed. The specifications in the Technical  Data section are intended to provide the basis for establishing functional use, as well as setting the quality assurance test performance levels. * Connectors vary by product number, see chart on back

Polycap TF


Polycap TF Features

  • Hydrophobic PTFE membrane
  • Autoclavable
  • Flow Direction: Bi-Directional; certain  applications may require orientation, i.e., vents
  • Integrity testable: Bubble Point.
  • Compact: Efficient design provides high effective  filtration area in small size
  • Vented: Manual vent with luer lock can function  to: bleed air from  upstream, serve as injection or sample port. Vent  is on inlet side of housing.
  • Product Identification and Lot No. stamped into  each housing
  • Package Clean “double wrapped”
  • Manufactured in ISO controlled production  facilities
  • 100% Integrity Tested during manufacture

Typical Applications for Whatman Polycap TF Filter


Venting: Vent Filling, Mixing, Holding, Autoclave, and Fermentation  Vessels

In Line Filtration: Sterilize and Remove Particles from Air/Gas/Liquid  Streams • Remove Liquid Aerosols from Air/Gas Streams • Degas, Clarify, and Sterilize Liquid Streams

Other Uses: Clean Nitrogen used to dry samples

  • Ensure clean Inert Gases in vial filling lines
  • Instrument Gas/Air preparation
  • Point of use  “Ultra Clean” Gases, Air, Solvents for Air Guns & Cleaning Wands

Isolation (gases pass, liquids/aerosols stopped): Isolation of Gases or Vents for Incubators, Autoclaves, Lyophilizers, EtO Sterilizers • Isolation  of Exhaust from Fermentors

Electronics: Photoresists, solvents, gases for research or industry

Pharmaceutical: Vents and In Line for production systems

Biotech: Vents & exhausts for biological environments, in-line gas  sterilization.

Operating Instructions:

Safety: Considering the special factors of your application, consult the Technical Data section on back to determine correct use. Key safety concern is not to exceed the pressure, temperature, or chemical compatibility recommendations.

PTFE membrane considerations: PTFE membrane is hydrophobic and  will not allow water (aqueous solutions) to pass without high pressure. These pressures are called the Water Breakthrough Test (WBT) values, and change with the pore size of the membrane. Aqueous solutions  may be filtered if the membrane is initially “wetted” with alcohol or  other appropriate solvents. PTFE membrane will stop aqueous aerosols  in gas streams.

Efficiency: To maximize filtration throughput, use the largest pore size  filter that will provide the required cleanliness. If the material to be  filtered is heavily contaminated, consider prefilters. To extend filter life use low flow or pressure.

Autoclaving: Autoclave; requires 121°C at 1.05 Kg/cm² (15 psi) for 20 minutes. May tolerate 132°C for one hour. Multiple autoclave cycles  may be possible, however, reuse is the responsibility of the operator, who should protect the device from cross contamination and detect  loss of integrity by appropriate testing. (Et0 sterilization should be  possible but no studies have been conducted. Radiation is destructive  to PTFE.)

Filtration Installations:


Attach one connector to vessel, the other connector is open to the atmosphere. If exhaust gas is saturated with moisture, install vent  filter in a vertical position to allow collected moisture to drain back into vessel rather than fill (and block) vent filter housing. Sterilizing vents are  typically 0.45 μm, or for longer duration and maximum security, use a 0.2 μm membrane.

Air/Gas “In-Line”: Effective service life varies. Replacement is required  on a timely (routine) basis. Monitor pressure build-up or flow restriction to determine frequency. Pore size selection is based on application.

Solutions: Small volumes may be filtered using a syringe; larger volumes may be filtered by connecting to the outlet of a pressure vessel or “in line” using gravity, vacuum, or peristaltic pump for the pressure required to filter. Air Locks seriously hamper flow rates; to eliminate, point the outlet of the filter device upward during initiation of  liquid flow. The air in the system and filter device must be flushed prior  to the membrane being wetted.

Integrity Testing:

Bubble Point (BP) Test: Flush the PTFE membrane filter device with an appropriate solution (methanol). After the membrane is completely wetted, apply air under controlled pressure until air breaks through the membrane and bubbles from the exit. The pressure at which air passes through the “wetted” membrane is the “bubble point”. Refer to the table for pore size and methanol BP values. The test is best conducted with outlet connector pointed upward.

Bubble Point (BP) Test

Technical Data: Polycap TF Venting & Solvent Filtration

Chemical Resistance Summary*
Classes of Substances 20°C (68°F) Polypropylene/PTFE Guide* for use
Acids, dilute Long Term
Acids, concentrated Long Term
Alcohols Long Term
Aldehydes One Month
Bases Long Term
Esters One Week
Hydrocarbons, aliphatic One Month
Hydrocarbons, aromatic One Week
Hydrocarbons, haloginated One Week
Ketones One Month
Oxidizing agents, strong One Week

*Published as a general guide only. Due to time, temperature, and  stress variations the user must evaluate the specific product and  application to determine the appropriateness of use.

Published as a general guide only


Filtration Ratings Inlet and Outlet Fittings Inlet and Outlet Fittings
Pore Size Capsule Size ¼"–⅜" (6–9 mm) Stepped Hose Barb 1–1½" (6–9 mm) Stepped Hose Barb ⅜" FNPT ¼" MNPT
0.1 µm Polycap 36 TF        
Polycap 75 TF        
Polycap 150 TF     WHA2800T  
0.2 µm Polycap 36 TF WHA2601   WHA2601T  
Polycap 75 TF     WHA2702T WHA2703M
Polycap 150 TF   WHA2801 WHA2802T  
0.45 µm Polycap 36 TF   WHA26025    
Polycap 75 TF     WHA2703T  
Polycap 150 TF     WHA2803T  
1.0 µm Polycap 36 TF WHA2603   WHA2603T  
Polycap 75 TF     WHA2704T  
Polycap 150 TF     WHA2804T  


Technical Specifications:
Housing: Polypropylene
Filter Media: PTFE
Vent: On Inlet
Support System: Polypropylene
Sealing: Heat fused
Maximum Pressure: 60 psi (4.1 bar)
Effective Filtration Polycap 36 – 500 cm²
Area: Polycap 75 – 1000 cm²
Polycap 150 – 2000 cm²
Alcohol Bubble Point: 0.1 μm – 25 psi (1.7 bar)
0.2 μm – 13 psi (0.9 bar)
0.45 μm – 7 psi (0.5 bar)
1.0 μm – 3 psi (0.2 bar)
Hold-up Volume: Polycap 36 – 70 ml, Polycap 75 – 125 ml, Polycap 150 – 250 ml. Purging with air will minimize hold-up to a few ml.
Autoclaving: Autoclavable @ 121°C for 15 minutes. Maximum  cycle is 132°C for 1 hour. Multiple autoclave cycles  are possible, but integrity testing and re-use is the  responsibility of the operator.

Quantity per Pack: 5