The HA-5A-4 balanced waterproof vent valve combines M5 thread with 9ml/min airflow, making it a universal protective component for solar inverters, telecom base station cabinets, and outdoor distribution terminals. The 11mm installation height and O-ring (4.0mm ID × 2.0mm CS) provide reliable sealing. This product achieves an excellent balance between pressure equalization efficiency and dust/water protection—a cost-effective choice for project sourcing.

The HA-5A-3 is the highest-flow model in the HA series, delivering an exceptional 47ml/min airflow on an M5 thread. Designed for ultra-large-volume or extreme-heat power electronics—such as energy storage containers, large VFDs, and wind turbine converters—its 15mm installation height and reinforced O-ring provide rugged structural strength and sealing redundancy, making it the top choice for heavy-duty electrical protection.

The HA-5A-2 compact waterproof vent valve features an ultra-low installation height (7.3mm) and short thread (4mm), making it ideal for ultra-thin electronics and portable instruments. With M5 thread and a reduced CS O-ring, it achieves IP68 protection and 3ml/min pressure equalization within minimal space, offering reliable miniature protection for handheld terminals and wearable devices.

The HA-5A-1 long-thread waterproof vent valve is engineered for thick-wall cabinets (wall thickness ≥5mm) and high-strength mounting requirements. With an effective M5 thread length of 9mm and 4mm ID O-ring, it offers superior pull-out resistance and vibration-proof sealing. The stable 3ml/min baseline airflow is ideal for heavy-duty equipment such as construction machinery controllers and railway signaling boxes.

The HA-4A-2 is an M4-thread waterproof vent valve specifically designed for telecom RF units (RRU/AAU) and outdoor smart cabinets. The 9ml/min airflow covers the breathing requirements of most outdoor enclosures, while the 10mm installation height allows easy integration into space-constrained layouts. The stainless steel housing and IP68 protection effectively prevent condensation-related VSWR anomalies and RF performance degradation in base station equipment.

The HA-4C corrosion-resistant vent valve features a steel substrate with electroless nickel plating, specifically developed for harsh salt-spray environments such as offshore wind power, marine navigation, and coastal security. With M4 thread and 9ml/min airflow, it provides reliable breathing protection for electronic equipment in severe marine climates. The nickel plating effectively resists chloride ion attack, significantly extending service life in humid, salt-laden atmospheres.

The HA-4A-1 high-flow waterproof vent valve is specifically designed for electric vehicle battery packs and large-scale energy storage cabinets. Building on the M4 thread, it boosts airflow to 12ml/min to rapidly equalize pressure in large-volume sealed cavities under fast charge/discharge or extreme temperature changes. The enlarged O-ring (3.0mm ID × 2.0mm CS) provides additional sealing redundancy, ensuring long-term safe operation of high-voltage electrical systems.

Say goodbye to expensive import lead times and single-source dependency! This domestically manufactured HA Series waterproof breathable vents deliver performance comparable to top international brands at a highly competitive price. The core breathable membrane uses imported E-PTFE raw materials, with water ingress resistance stable at -120 mbar (>1M) and IP68 protection. For the widely used M4 and M5 interfaces, we offer various height and airflow combinations—for example, the HA-4A-2 maintains 9 ml/min airflow in a compact 10L10.6 package. The product comes standard with oil- and weather-resistant FKM O-rings, with an operating temperature range spanning -50℃ to 150℃. Whether replacing aging imported valves or implementing cost control for new projects, this series helps you significantly reduce material costs and procurement cycles while meeting airflow requirements from 3 ml/min to 47 ml/min, making it an excellent choice for cost-reduction strategies.

The HA-2.5A miniature waterproof vent valve is specifically developed for pressure equalization in ultra-compact sealed electronic devices. With its M2.5 precision thread and only 5.5mm installation height, it fits perfectly into space-constrained sensor housings and LED drivers. Constructed from stainless steel with an E-PTFE membrane, it delivers a stable 3ml/min airflow rate and IP68 protection, effectively preventing condensation and salt spray ingress, significantly enhancing long-term reliability of outdoor miniature equipment under extreme temperature swings from -50°C to 150°C.

The HA-4A is the most widely adopted M4-thread waterproof vent valve in the HA series. With an 8mm body diameter and 6mm installation height, it fits most outdoor controllers, junction boxes, and telecom RF units. The 3ml/min baseline airflow combined with -120mbar water entry pressure provides cost-effective daily protection, effectively addressing condensation and internal corrosion caused by diurnal temperature variations.

This waterproof breathable valve is a metal valve designed for satellite applications. It is made of stainless steel and embedded with a micro E‑PTFE membrane. It features high temperature resistance, corrosion resistance, and resistance to oxidation. The installation method is simple.