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.

The back-frame isolator is a device used to reduce the transmission of vibrations from mechanical equipment. It typically consists of a series of springs, damping materials, or airbags, providing vibration isolation between the equipment and its support. This reduces the transmission of vibrations, thereby protecting the equipment and minimizing noise.

The Disc Spring Locking Device is a front-end tightening assembly designed for manual operation on communication equipment. It is manufactured using specialized processes and primarily consists of components including screws, flat washers, disc springs (Belleville washers), and handles.