One-Way Ventilation Explosion-Proof Valves

PUW has specially developed the PD12A4K-51Y Unidirectional Explosion-Proof Valve to meet the stringent safety and performance requirements of non-vacuum sealed cavities in new energy vehicle (NEV) battery packs. This valve balances internal pressure under normal operation and provides rapid pressure relief in emergency situations, thereby protecting the battery system from damage caused by overpressure or thermal runaway.

Designed for New Energy Vehicle Battery Safety

With the rapid adoption of EVs and hybrid vehicles, battery packs are becoming more compact and powerful. To ensure operational safety and system reliability, PUW offers an innovative solution that combines pressure regulation, explosion protection, and environmental sealing in one precision-engineered unit.

Product Features & Advantages

Pressure Balancing + Quick Pressure Relief: Maintains pressure stability during regular operation and vents rapidly during overpressure.

High Precision Activation Point: Initiates venting reliably at a defined pressure range (9–15 kPa).

Repeatable Detection Performance: Ensures consistent reliability across product batches.

IP68 & IP6K9K Protection: Complete protection against dust, water ingress, and high-pressure cleaning – ideal for automotive environments.

Unidirectional Design: Prevents backflow while allowing pressure release through a dedicated direction.

Dual-Channel Venting Structure: Enables controllable orientation and fast venting efficiency.

No Waterproof Membrane Design: Optimized for explosion relief without compromising airflow.

Typical Applications

• EV Battery Packs (Non-vacuum sealed)

• PHEV & Hybrid Battery Modules

• Energy Storage Systems (ESS)

• Onboard Battery Safety Systems

• Battery Compartment Pressure Management

• Explosion Protection for Enclosed Energy Devices

Installation & Mounting

• The PD12A4K-51Y is mounted externally using a 4-hole flange configuration for secure and stable attachment to the battery housing or vent cover.

• Ensure correct installation orientation for optimal airflow direction and reliable venting performance.

Why Choose PUW Explosion-Proof Valves?

• Specialized for new energy vehicle safety systems

• High repeatability and manufacturing consistency

• Industry-rated IP68 / IP6K9K protection

• Reliable burst pressure control (9–15kPa)

• Compact design with robust aluminum alloy housing

• Fast-response dual-channel venting

Customization Options

PUW supports OEM/ODM customization based on client specifications, including:

• Turning pressure range adjustment

• Body material options (for higher corrosion resistance)

• Custom mounting interface designs

• Performance tuning (air permeability, exhaust area)

FAQ – Frequently Asked Questions

Q1: What is the function of the PD12A4K-51Y explosion-proof valve?
A1: This valve is designed to maintain internal pressure balance during regular operation and to quickly relieve excess pressure in non-vacuum sealed battery packs of new energy vehicles. It prevents explosion risks caused by thermal runaway or overpressure while offering unidirectional airflow and environmental protection.

Q2: Is this valve suitable for use in EV battery packs?
A2: Yes. The PD12A4K-51Y is specially developed for new energy vehicle (EV, PHEV) battery applications. It supports rapid gas release during abnormal conditions and has been tested for performance in harsh automotive environments.

Q3: What is the rated turning pressure?
A3: The valve initiates pressure relief at 9–15 kPa, ensuring high precision in activation while maintaining safety margins. This value can be fine-tuned upon request.

Q4: Does it support waterproof and dustproof requirements?
A4: Yes. It meets IP68 and IP6K9K protection standards, ensuring full resistance to dust, water immersion, and high-pressure spray, making it suitable for under-vehicle or exposed environments.

Q5: What is the airflow capacity of this valve?
A5: The valve provides air permeability of 650 mL/min at 1.5 kPa. If higher flow or other pressure points are needed (e.g., 2.5 kPa), PUW can evaluate custom solutions.

Q6: Can this valve be customized for my specific battery enclosure?
A6: Absolutely. We support OEM/ODM customization, including different airflow ratings, materials, pressure ranges, flange configurations, and marking requirements.

Q7: Is the valve reusable after activation?
A7: The valve is designed for multiple low-pressure cycles and repeatable activation under standard operating conditions. However, after a full high-pressure venting event (such as thermal runaway), replacement is recommended for safety.

Q8: How is the valve installed?
A8: It uses a 4-hole external flange mounting system for easy installation on battery housings or pressure relief zones. A proper gasket and torque tightening are recommended to maintain sealing performance.