| Waterproof Rating | IP68 |
| Operating Temperature | -40°C to +150°C |
| Water Entry Pressure | ≥ 400 kPa |
| Size | Customizable |
| Thickness | 0.10 – 0.50 mm |
| Oleophobicity Grade | ≥ 7 |
| Chemical Resistance | Corrosion-resistant,Acid-resistant |
| Delivery Time | 15 working days |
| Moisture Vapor Transmission Rate | 8,000 – 18,000 g/m²·24h |
| Packaging Details | Small orders by express; bulk orders by FCL sea freight. |
| 90° Peel Strength | ≥ 15 N/25mm |
| Material Compliance | PFAS Free |
| Supply Ability | Monthly Output: 300,000 sqm |
| Payment Terms | T/T |
| Air Permeability | Gurley:3 – 30 s/100ml @ 300 ml |
| Color | White |
| Model Number | OEM/ODM |
| Brand Name | OEM/ODM |
| Place of Origin | China |
| Certification | IATF16949/ISO |
View Detail Information
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Product Specification
| Waterproof Rating | IP68 | Operating Temperature | -40°C to +150°C |
| Water Entry Pressure | ≥ 400 kPa | Size | Customizable |
| Thickness | 0.10 – 0.50 mm | Oleophobicity Grade | ≥ 7 |
| Chemical Resistance | Corrosion-resistant,Acid-resistant | Delivery Time | 15 working days |
| Moisture Vapor Transmission Rate | 8,000 – 18,000 g/m²·24h | Packaging Details | Small orders by express; bulk orders by FCL sea freight. |
| 90° Peel Strength | ≥ 15 N/25mm | Material Compliance | PFAS Free |
| Supply Ability | Monthly Output: 300,000 sqm | Payment Terms | T/T |
| Air Permeability | Gurley:3 – 30 s/100ml @ 300 ml | Color | White |
| Model Number | OEM/ODM | Brand Name | OEM/ODM |
| Place of Origin | China | Certification | IATF16949/ISO |
| High Light | EPTFE Drum Bung Vent ,55 Gallon Drum Bung Vent ,Drum Pressure Relief EPTFE Vent | ||
Weldable EPTFE Drum Bung Vent For 55-Gallon Steel & Plastic Drum Pressure Relief
The weldable ePTFE drum bung vent for 55-gallon steel and plastic drum pressure relief is a heavy-duty pressure management component engineered for the global drum packaging industry. This vent integrates a rugged, chemically resistant ePTFE waterproof breathable membrane into a robust weldable thermoplastic carrier, designed to be welded into the 2-inch or 3/4-inch bung closure of standard 55-gallon (200L) steel, HDPE, or composite drums. It provides continuous, maintenance-free pressure equalization during the entire drum lifecycle: filling, transport, storage, and dispensing. During hot filling, it allows expanding air to escape. During cooling, it allows filtered air to enter, preventing vacuum collapse. During transport across altitude and temperature extremes, it prevents dangerous pressure buildup that can bulge drum heads, blow out seals, or cause violent gushing when the bung is opened. The chemically inert membrane withstands the full spectrum of industrial chemicals, solvents, and petroleum products, making this vent the essential safety and integrity component for the world's most common bulk container.
The 55-gallon steel or plastic drum is the universal container of global industry, used to ship everything from lubricating oils and solvents to food ingredients and hazardous chemicals. Drums undergo extreme pressure stresses during their lifecycle. A drum filled with hot liquid and sealed will develop a powerful vacuum upon cooling, causing the steel head to collapse inward—a "paneling" failure that makes the drum unstackable and the contents impossible to pump. A drum containing a volatile solvent will build pressure when exposed to solar heat during transport, potentially blowing out the gasket or spraying product when opened. A drum shipped by air or over a mountain pass will experience significant atmospheric pressure changes. Without a vent, the drum is a pressure vessel, not just a container. A welded-in vent provides a permanent, reliable pressure relief pathway that protects the drum, its contents, and the people who handle it.
The weldable ePTFE drum bung vent is integrated directly into the drum closure during manufacturing. For plastic drums, the PP or PE carrier is hot-plate or ultrasonically welded into a port in the bung or the drum head, creating a permanent, leak-proof bond. For steel drums, the vent is welded into a plastic bung insert that is mechanically crimped or sealed into the steel drum head. The ePTFE membrane provides continuous, bidirectional airflow to equalize pressure during all phases of the drum's life. It is a complete liquid barrier, ensuring that no chemical leaks out even if the drum is accidentally tipped or stored on its side. The membrane resists chemical attack from the drum's contents and is oleophobic, preventing wetting by oils and solvents.
| Parameter | Specification |
|---|---|
| Product Type | Weldable ePTFE Drum Bung Vent |
| Carrier Material | PP or PE (weldable to plastic drums and bungs) |
| Membrane Material | Chemically resistant, oleophobic ePTFE |
| Airflow | ≥ 800 ml/min @ 1 psi |
| Water Entry Pressure | ≥ 90 kPa |
| Chemical Resistance | Solvents, oils, acids, alkalis, petrochemicals |
| Operating Temperature | -30°C to +90°C |
| Installation | Ultrasonic welding, hot-plate welding, or mechanical crimp |
| Drum Compatibility | 55-gallon (200L) steel, HDPE, composite drums |
| Bung Compatibility | 2-inch (fine and coarse thread), 3/4-inch bung openings |
| Ingress Protection | IP67 equivalent |
The vent is welded into the drum bung or drum head. As the drum's internal pressure fluctuates with temperature, altitude, and liquid volume changes, air flows through the ePTFE membrane to equalize the pressure. Expanding hot air escapes; cooling air contracts and is replaced by filtered ambient air. The membrane's 0.2-0.5 micron pore structure blocks liquid, dust, and bacteria. The drum remains pressure-neutral, its structural integrity preserved, and its contents safely contained.
Q: Can the vent be retrofitted into existing drums?
A: The weldable vent is designed for integration during drum manufacturing. For retrofit applications, we offer a screw-in bung vent adaptor that replaces the standard bung plug.
Q: Will the vent prevent the "rush of air" and product spray when opening a pressurized drum?
A: Yes, by continuously equalizing pressure, the vent ensures that the drum is at ambient pressure when opened, eliminating the dangerous gush of air or liquid.
Q: Is the vent compatible with UN-certified drum packaging?
A: Yes, the vent supports UN packaging certification by providing the controlled pressure relief required for dangerous goods transport.
Q: Can the vent withstand the drop test required for UN drum certification?
A: The welded or mechanically secured vent maintains its integrity through standard UN drop tests when properly installed.
Q: How does the vent handle viscous products like heavy lubricating oil?
A: The oleophobic membrane resists wetting by oils and greases, maintaining its breathability even when splashed with viscous product.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2018
Total Annual:
1,000,000-2,000,000
Employee Number:
30~50
Ecer Certification:
Verified Supplier
Kunshan Xinzhenpin New Thin Film Material Technology Co., Ltd. Established in 2018, Kunshan Xinzhenpin is a specialized manufacturer dedicated to ePTFE waterproof and breathable membrane solutions. We operate a fully integrated production chain covering ePTFE raw membrane manufacturing, composite a... Kunshan Xinzhenpin New Thin Film Material Technology Co., Ltd. Established in 2018, Kunshan Xinzhenpin is a specialized manufacturer dedicated to ePTFE waterproof and breathable membrane solutions. We operate a fully integrated production chain covering ePTFE raw membrane manufacturing, composite a...
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