Better battery systems with Porex porous materials
Porex has been helping battery manufacturers improve their products for over 50 years. From the humble flame arrestor used in every lead-acid battery, to critical safety relief vents used in modern electric vehicles, Porex has the technology and know-how to make your product safer and more reliable.
Our broad portfolio includes:
- POREX Virtek® PTFE which is used in numerous safety venting and separation applications.
- Porous polymer and fiber materials used as vents, separators, isolators, or electrolyte holding media.
Lead-acid Battery Vents
Global leader in lead-acid battery vents
EV and Fuel Cell Vents
Protect battery packs and fuel cells
Separators & Isolators
Isolate components within batteries and fuel cells
Lead-acid Battery Vents
Global leader in lead-acid battery vents
As the largest global supplier of battery vents, Porex offers a wide range of standard products and other options to support battery technology at facilities across the globe.
POREX® lead-acid battery vents are critical for batteries to function efficiently. Specifically designed to improve the safety of automobiles, our lead-acid battery vents:
- Prevent sparks from entering the battery, reducing the chance of explosion.
- Reduce the risk of acid spillage and aerosol emissions by providing controlled airflow, venting and optimized back pressure.
- Allow easy assembly with heat welding or push-fit processing.
| Rectangular Vents | Thickness | Width | Length | |||
|---|---|---|---|---|---|---|
| Item # | Inches | mm | Inches | mm | Inches | mm |
| XA-5019 | 0.106″ – 0.120″ | 2.70 – 3.06 | 0.228″ – 0.244″ | 5.80 – 6.20 | 0.935″ – 0.955″ | 23.75 – 24.25 |
| XA-5020 | 0.108″ – 0.120″ | 2.75 – 3.06 | 0.228″ – 0.244 | 5.80 – 6.20 | 1.171″ – 1.191″ | 29.75 – 30.25 |
| XS-7499 | 0.122″ – 0.130″ | 3.10 – 3.30 | 0.378″ – 0.394″ | 9.60 – 10.00 | 0.612″ – 0.630″ | 15.55 – 16.00 |
| XA-5001-3 | 0.128″ – 0.148″ | 3.25 – 3.75 | 0.535″ – 0.559″ | 13.60 – 14.20 | 0.524″ – 0.547″ | 13.30 – 13.90 |
| Round Vents | Diameter | Thickness | ||
|---|---|---|---|---|
| Item # | Inches | mm | Inches | mm |
| XA-5008-1 | 0.229″ – 0.243″ | 5.82 – 6.18 | 0.110″ – 0.126″ | 2.80 – 3.20 |
| XA-6404 | 0.384″ – 0.404″ | 9.75 – 10.25 | 0.148″ – 0.167 | 3.75 – 4.25 |
| XS-9017 | 0.390″ – 0.398″ | 9.90 – 10.10 | 0.148″ – 0.167″ | 3.75 – 4.25 |
| XA-5027 | 0.390″ – 0.398″ | 9.90 – 10.10 | 0.150″ – 0.165″ | 3.80 – 4.20 |
| XA-5666 | 0.394″ – 0.409″ | 10.00 – 10.40 | 0.110″ – 0.130″ | 2.79 – 3.31 |
| A-5914 | 0.451″ – 0.465″ | 11.45 – 11.81 | 0.147″ – 0.171″ | 3.74 – 4.34 |
| 7682 | 0.451″ – 0.465″ | 11.46 – 11.81 | 0.147″ – 0.171″ | 3.73 – 4.34 |
| XA-5029 | 0.461″ – 0.476″ | 11.70 – 12.10 | 0.157″ – 0.181″ | 4.00 – 4.60 |
| 41023 | 0.484″ – 0.503″ | 12.29 – 12.78 | 0.142″ – 0.162″ | 3.61 – 4.11 |
| XA-5615 | 0.485″ – 0.502″ | 12.32 – 12.74 | 0.142″ – 0.162″ | 3.61 – 4.11 |
| XA-5612 | 0.489″ – 0.503″ | 12.42 – 12.78 | 0.120″ – 0.130″ | 3.05 – 3.31 |
| 40003 | 0.489″ – 0.503″ | 12.78 – 12.42 | 0.120″ – 0.130″ | 3.05 – 3.30 |
| XA-9402 | 0.492″ – 0.508″ | 12.50 – 12.90 | 0.118″ – 0.142″ | 3.00 – 3.60 |
| 41097 | 0.497″ – 0.508″ | 12.62 – 12.90 | 0.110″ – 0.122″ | 2.79 – 3.10 |
| XA-5679 | 0.505″ – 0.519″ | 12.82 – 13.18 | 0.120″ – 0.130″ | 3.05 – 3.30 |
| XS-8088 | 0.505″ – 0.519″ | 12.82 – 13.18 | 0.120″ – 0.130″ | 3.05 – 3.31 |
| XA-5514 | 0.565″ – 0.585″ | 14.35 – 14.85 | 0.112″ – 0.131″ | 2.85 – 3.35 |
| XS-56751 | 0.618″ – 0.634″ | 15.70 – 16.10 | 0.140″ – 0.159″ | 3.55 – 4.05 |
| XA-5896 | 0.630″ – 0.644″ | 15.98 – 16.38 | 0.140″ – 0.160″ | 3.56 – 4.06 |
| XA-5675 | 0.631″ – 0.644″ | 16.04 – 16.36 | 0.140″ – 0.160″ | 3.56 – 4.06 |
| XA-5537 | 0.668″ – 0.682″ | 16.97 – 17.33 | 0.114″ – 0.134″ | 2.90 – 3.40 |
| 5441 | 0.745″ – 0.759″ | 18.92 – 19.28 | 0.125″ – 0.137″ | 3.18 – 3.48 |
| XA-5812 | 0.748″ – 0.752″ | 19.21 – 19.71 | 0.100″ – 0.135″ | 2.55 – 3.43 |
| XS-5793 | 0.781″ – 0.793″ | 19.85 – 20.15 | 0.110″ – 0.126″ | 2.80 – 3.20 |
| XA-5024 | 0.784″ – 0.799″ | 19.90 – 20.30 | 0.144″ – 0.171″ | 3.65 – 4.35 |
| XA-6022-1 | 0.839″ – 0.854″ | 21.30 – 21.70 | 0.051″ – 0.067″ | 1.30 – 1.70 |
| XA-5009 | 0.880″ – 0.900″ | 22.36 – 22.86 | 0.149″ – 0.173″ | 3.79 – 4.39 |
Related Resources:
Datasheet: POREX Battery Vents
Demonstration Video: Comparison of PTFE for use in a Breather / Rupture Disk Combination Device
Demonstration video: Porex Virtek PFOA Free Membrane vs. Cast and Non-woven Membranes
EV and Fuel Cell Vents
Protect battery packs and fuel cells
Protect your battery packs and fuel cells with high performance POREX® protection vents. Designed with the robust POREX Virtek PTFE sintered structure, our vents allow pressure equalization or in case of a failure, rapid release of gases while keeping dust and moisture out of the enclosure.
Specifically designed for battery packs and fuels cells, our vents:
- Contain a robust PTFE sintered structure–The POREX Virtek sintered structure is more robust and will not damage easily like expanded PTFE materials.
- Do not change when handled– Airflow variations can occur when handling expanded PTFE, but not with POREX Virtek PTFE.
- Assemble easily–Protection vents can be attached using ultrasonic, heat welding, overmolding and a variety of other attachment techniques.
- Fully assembled vents-Porex can provide custom finished vents to your specifications.
- Can be designed to act as a breather and safety vent.
- Free of PFOA: Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP
POREX Virtek® PTFE Vent Plugs — Typical Properties
| Item Number | Diameter mm (in.) | Thickness mm (in.) | WEP* mbar | IP Rating† | Typical Vent Airflow l/hr @70mbar | Max Operating Temp °C | Filtration Efficiency (99.99%) | UL-94 Rating |
|---|---|---|---|---|---|---|---|---|
| PD103032 | 3.2 (1/8″) | 3 (1/8″) | 450 | 64,67,68 | 1 | 260°C | 0.5 µ | 5VA, f1 |
| PD103063 | 6.3 (1/4″) | 3 (1/8″) | 450 | 64,67,68 | 3.8 | 260°C | 0.5 µ | 5VA, f1 |
*WEP = Water Entry Pressure
† IEC std. 60529; IP 68 is a user defined and results must be verified; product has not been specifically tested – passing is based on results from similar products
Assembly methods include: press fit, over-molding, compression seal, adhesive bonding or flange welding.
Numerous custom and standard options available. Please contact your local Porex sales representative to determine what is available.
Properties are typical and not meant for specifications. RoHS, WEEE, and REACH Compliant (PFOA Free)
STOCK PRODUCT OFFERING BY MATERIAL SERIES – POREX Virtek® ADHESIVE DISCS
| Dimensions | ||||
|---|---|---|---|---|
| OD x ID (mm)* | PMV10L | PMV15 | PMV20 | PMV30 |
| 7.0 x 3.0 (N) | PMV10LN | PMV15N | PMV20N | PMV30N |
| 10.0 x 6.0 (P) | PMV10LP | PMV15P | PMV20P | PMV27P** |
| 12.7 x 7.1 (W) | PMV10LW | PMV15W | PMV20W | PMV30W |
| 20.0 x 13.0 (C) | PMV10LC | PMV15C | PMV20C | PMV30C |
| 12.7 x 7.1 (W) | PMV15WH# | |||
| 12.7 x 7.1 (W) | PMV15TWH## |
*1000 discs/roll
**PMV27 will become the new standard offering – other sizes will follow
# With high temperature adhesive (good to 150 °C )
## Oleophobic Treated and high temperature adhesive (good to 150 °C )
N, P, W & C are size codes.
Many other standard and custom sizes available. Contact Porex for more information
Related Resources:
Datasheet: POREX Virtek IP-Rated Protection Vents
Demonstration video: Hydrophobicity and handling properties: POREX Virtek PTFE vs. expanded PTFE
Demonstration video: Durability Comparison: POREX Virtek PTFE vs. expanded PTFE
Demonstration video: Dangers of not venting a sealed enclosure
Demonstration video: Keep electronics dry and protected with POREX Virtek PTFE vents
Demonstration Video: Comparison of PTFE for use in a Breather / Rupture Disk Combination Device
Demonstration video: Porex Virtek PFOA Free Membrane vs. Cast and Non-woven Membranes
Separators & Isolators
Isolate components within batteries and fuel cells
Components within batteries and fuel cells need separation to function properly. That’s why our teams have developed custom-molded porous components – including sintered particles, PTFE membrane and porous fiber products – designed to isolate or separate components within these products.
Specifically designed to separate components in batteries and fuel cells, our materials:
- Offer a wide variety of material and porous technologies– Assortment of materials including sintered particles, PTFE membrane, and porous fiber can be used in several types of batteries and fuel cells.
- Free of PFOA: Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP
Materials Offered
- Advanced porous materials (PE, PP)
- PTFE membrane
- Porous polymeric fiber
Formats Available
- Film or sheet
- 3D molded shapes
- 2D fiber shapes
- Customization options based on design requirements