quality High Airflow Threaded Breather Vent with Waterproof Membrane M20 Bolt Type factory
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quality High Airflow Threaded Breather Vent with Waterproof Membrane M20 Bolt Type factory
quality High Airflow Threaded Breather Vent with Waterproof Membrane M20 Bolt Type factory
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High Airflow Threaded Breather Vent with Waterproof Membrane M20 Bolt Type

Brand Name: OEM/ODM
Model Number: OEM/ODM
Place of Origin: China
Certification: IATF16949/ISO
Minimum Order Quantity: 20,000 pcs
Price: Negotiable
Supply Ability: Monthly Output: 300,000 sqm

Product Details


Color: White Thickness: 0.10 – 0.50 Mm
Air Permeability: Gurley:3 – 30 S/100ml @ 300 Ml Water Entry Pressure: ≥ 400 KPa
Waterproof Rating: IP68 Moisture Vapor Transmission Rate: 8,000 – 18,000 G/m²·24h
Oleophobicity Grade: ≥ 7 90° Peel Strength: ≥ 15 N/25mm
Operating Temperature: -40°C To +150°C Size: Customizable
Material Compliance: PFAS Free Chemical Resistance: Corrosion-resistant,Acid-resistant
Highlight

High Airflow Threaded Breather Vent

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M20 Bolt Type Waterproof Vent

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Eptfe Membrane Vent

Product Description

High Airflow Threaded Breather Vent with Waterproof Membrane M20 Bolt Type

Product Overview

This high airflow threaded breather vent features an M20 bolt-type body and a large-surface-area ePTFE membrane to deliver superior volumetric air exchange. It is engineered for enclosures with rapid temperature transients or large internal air volumes that require fast pressure equalization. The robust metal construction maintains IP68 waterproof integrity while handling demanding industrial and automotive environments.

Cause

Large gearboxes, hydraulic system tanks, and voluminous electronic enclosures experience rapid pressure changes that small vents cannot handle. Inadequate airflow leads to time-lag pressure differentials, which stress gaskets and cause oil foaming. High-flow applications also produce oil mist that can saturate standard membranes, clogging them and nullifying venting benefits.

Solution

The M20 high airflow vent bolt incorporates a significantly larger membrane area, achieving flow rates above 1200 ml/min. This ensures instantaneous pressure equalization even during aggressive thermal shocks. An integrated oleophobic treatment repels oil mist, keeping the membrane clear and maintaining high airflow over the vent’s service life. The heavy-duty metal cap protects against mechanical impact.

Specifications
  • Thread: M20 x 1.5

  • Body: Zinc-plated steel or stainless steel

  • Membrane: ePTFE with oleophobic coating

  • Airflow: 1200 ml/min @ 70 mbar

  • Waterproof: IP68

  • Operating temperature: -40°C to 150°C

  • Effective membrane area: 380 mm²

Application

Ideal for large industrial gearboxes, wind turbine yaw and pitch drives, hydraulic power pack reservoirs, large-scale battery cabinets, and climatic test chambers. Also suitable for off-highway axle housings experiencing severe mud and water exposure.

How It Works

When internal pressure rises, air rushes out through the porous membrane with minimal resistance due to the enlarged area. When the enclosure cools, air rapidly returns. The oleophobic surface causes oil droplets to bead up and roll off, preserving airflow paths. The M20 thread provides a robust mechanical connection that withstands vibration and shock without loosening.

How To Choose

Determine the required venting rate by calculating your enclosure’s air volume and the maximum expected temperature slew rate. If oil mist is present, choose the oleophobic variant. For offshore or marine environments, specify 316 stainless steel. Ensure the housing has adequate wall thickness to support the M20 thread.

FAQ

Q: How does oleophobicity work?

A: The ePTFE membrane is treated with a low surface energy coating that repels oils. This prevents formation of liquid films that would block pores.

Q: Can this vent be cleaned if oil mist eventually clogs it?

A: You can flush it gently with isopropyl alcohol and allow it to air dry. Avoid mechanical scrubbing.

Q: What is the maximum differential pressure this vent can handle?

A: It can continuously withstand 1 bar differential. For higher pressures, a burst disc option is required.

Product Highlights

High Airflow Threaded Breather Vent with Waterproof Membrane M20 Bolt Type Product Overview This high airflow threaded breather vent features an M20 bolt-type body and a large-surface-area ePTFE membrane to deliver superior volumetric air exchange. It is engineered for enclosures with rapid ...

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