Aerospace-Grade Vibration Isolator Manufacturer Offering One-Stop Shock And Vibration Solutions

Focus on Optimized-Flow M4 Model HA-4A-2 1

Focus on Optimized-Flow M4 Model HA-4A-2 2

Focus on Optimized-Flow M4 Model HA-4A-2 3

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Focus on Optimized-Flow M4 Model HA-4A-2

The waterproof breather vent valve provides dual protection functions: waterproof sealing and internal pressure equalization. This dual mechanism ensures that electronic enclosures remain both physically sealed and dynamically balanced.
Waterproof performance is achieved through a microporous membrane that blocks liquid penetration while allowing gas exchange. Pressure equalization prevents internal stress buildup caused by thermal expansion or environmental pressure differences.
This protective synergy significantly reduces the risk of enclosure deformation, gasket failure, and internal condensation accumulation.
The HA series is therefore suitable for long-term use in environments where equipment reliability cannot be compromised, such as energy systems, industrial automation, and outdoor electronics.

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Key Application Fields

The Focus on Optimized-Flow M4 Model HA-4A-2 excels in key application fields such as surveillance and power distribution. Its advanced design ensures efficient data flow and enhanced reliability, making it ideal for real-time monitoring and seamless power management. Experience superior performance and optimized operations with every use.

● Wireless Communications: 5G RRU/AAU, microwave backhaul equipment, repeater enclosures

● Surveillance: High-speed PTZ cameras, thermal imaging gimbals, forest fire detection boxes

● Power Distribution: Smart pole-mounted switch controllers, RMU DTU units

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Technical Parameters

Parameter	Specification
Model	HA-4A-2
Thread Size	M4 × 0.7
Body Diameter / Wrench Size	10mm / 10.6mm
Installation Height / Thread Length	10.6mm / 1.7mm
Airflow Rate	9ml/min (at ΔP=1KPa)
Water Entry Pressure	-120mbar (>1m water column)
Operating Temperature	-50°C ~ +150°C
Material	Stainless Steel + E-PTFE
Ingress Protection	IP68 & IP67

Core Advantages

Focus on Optimized-Flow M4 Model HA-4A-2 10

Optimal Balance of Flow and Volume

At 9ml/min, the airflow provides fast pressure response for small-to-medium cabinets (5L~30L) while limiting moisture ingress. At 10mm installation height, it is 2mm shorter than HA-4A-1, offering better clearance in pole-mounted telecom enclosures with height restrictions.

Excellent RF Compatibility

The all-metal housing does not shield or interfere with RF signals, allowing safe installation near antennas or on RF front-end module cooling cavities. The E-PTFE membrane has a low dielectric constant, with negligible effect on near-field electromagnetic fields.

Reinforced Anti-Vibration Design

With 1.7mm effective thread length and O-ring (3.0mm ID × 2.0mm CS), the valve passes simulated transport vibration testing (10~55Hz, 0.35mm amplitude) without loosening or seal failure, suitable for tower-top installations with strong wind-induced vibration.

Proven Outdoor Performance

This model has been deployed in over 2 million units across China's three major telecom operators' 5G outdoor base stations, surviving typhoons, rainstorms, and sandstorms with a field failure rate below 0.01%.

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