| Customization: | Available |
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| Technics: | Injection Molding |
| Standard: | GB |
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Battery Magic Eye Principle and Usage Guide
Battery Safety Valve (also known as a vent valve, pressure relief valve, or release valve) is a critical safety component in lead-acid batteries-particularly in valve-regulated sealed lead-acid batteries (such as VRLA, AGM, and GEL types). It is used to regulate internal pressure and prevent damage or hazards caused by overpressure.
During charging, hydrogen and oxygen gases are generated inside the battery (due to the electrolysis of water), which causes internal pressure to rise.
The safety valve automatically opens when the pressure exceeds a preset threshold, releasing excess gas to prevent battery swelling or explosion.
Once the pressure returns to normal, the valve automatically closes, minimizing the ingress of external air and helping prevent electrolyte evaporation.
The safety valve is typically a one-way valve, allowing internal gas to escape while preventing outside air from entering.
This reduces self-discharge and oxidation of the electrolyte.
The valve maintains a sealed environment under normal operating conditions, reducing water loss and extending battery life.
Commonly found in conventional lead-acid batteries (such as automotive starter batteries).
Simple structure, made of flexible rubber; the cap lifts to release gas when internal pressure is high, and reseals by elasticity when the pressure drops.
Mainly used in valve-regulated lead-acid (VRLA) batteries.
Consists of a spring, valve core, and sealing ring, with a preset opening pressure (typically 5-30 kPa).
When the pressure exceeds the threshold, the spring compresses, and the valve opens to release gas; it automatically resets as the pressure decreases.
Uses a complex channel design to slow down gas release and prevent electrolyte from being expelled with the gas.
Suitable for high-power batteries such as UPS batteries and energy storage batteries.
| Specifications and Dimensions | ||||||
| Model | Top Diameter | Top Thickness | Gasket Thickness | Sealing Diameter | Sealing Length | Length |
| B101 | ∅21.3 | 2 | / | 019.16 | 14.5 | |
| B102 | ∅22.9 | 2 | / | 020.77 | 14.5 | 40/42/45/48/48.7/ 50/52/53/55/57.7/ 58/60/61.9/62.5/ 64/65/65.3/68/70/ 72/75/78 |
| B104 | ∅21.3 | 2 | / | 019.16 | 18 | |
| B105 | ∅22.9 | 2 | / | 020.77 | 18 | |
| Specifications and Dimensions | ||||||
| Model | Top Diameter | Top Thickness | Gasket Thickness | Thread Diameter | Thread Pitch | Length |
| A201 | ∅20 | 4 | 2.5 | M16 | 2 | 40/45/50/55 /60/65/68 |
| A202 | ∅20 | 4 | 2.5 | M15 | 2 | |
| A203 | ∅23 | 3 | 2.6 | M16 | 2 | |
| A204 | ∅23 | 3 | 2.6 | M15 | 2 | |
| A205 | ∅24 | 3 | 1.2 | M18 | 2.5 | |
Henan Energy Electric Equipment Co., Ltd. was established in 2011 and is an excellent and reliable power equipment manufacturer in China. The company mainly develops and produces oil-immersed transformers, dry-type transformers, box-type substations, high-voltage switches, and medium and low voltage complete sets of equipment. The equipment put into production and operation of the project advocates energy saving, intelligence, informatization, and mechanization. The company has established the Henan Triangle Energy-saving Transformer Engineering Technology Research Center, with 71 utility model patents and 15 invention patents. With years of accumulation in the transformer industry and strong technological innovation capabilities, HZEC products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa, and other regions, covering more than 40 countries.
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