One-Way Ventilation Explosion-Proof Valve

The One-Way Ventilation Explosion-Proof Valve (Model PD04A2K-50) is a high-performance explosion-proof air vent valve designed to maintain safe pressure release while enabling unidirectional airflow in hazardous environments. It prevents flammable gases, toxic fumes, and dust from re-entering protected enclosures or sensitive equipment, ensuring explosion protection, ventilation safety, and system reliability across a wide range of industrial settings.

This unidirectional ventilation valve is essential in environments where flammable vapors, dust, or combustible gases may pose explosion hazards, such as in chemical plants, battery enclosures, refineries, and hazardous goods storage facilities.

Key Features & Functional Advantages

Explosion-Proof Unidirectional Design

Engineered to support one-way gas release, this valve functions as a hazardous gas protection valve, ensuring that internal pressure buildup is safely discharged without allowing outside contaminants or explosive gases to re-enter. It isolates internal systems from volatile external conditions, effectively mitigating explosion risks.

IP68/6K9K Waterproof and Dustproof Protection

The PD04A2K-50 is rated IP68 and 6K9K, offering superior ingress protection. It withstands continuous submersion, dust ingress, and high-pressure water jet cleaning, making it ideal for outdoor installations or aggressive industrial conditions.

Rugged Aluminum Alloy Construction

Manufactured from high-quality aluminum alloy, this industrial explosion-proof valve offers excellent corrosion resistance, thermal stability, and mechanical strength, extending its service life in chemically reactive or moisture-laden environments.

High Venting Capacity

With a fully open spool exhaust area of 620 mm², this explosion-proof ventilation valve supports rapid pressure equalization. The high air throughput ensures efficient performance during emergency venting conditions, especially in sealed electrical enclosures, battery modules, or power distribution units.

Controlled Activation Pressure

The valve opens automatically under a turning pressure of 3–5 kPa, providing intelligent pressure control that protects equipment without premature venting. It maintains enclosure integrity while preventing dangerous over-pressurization.

Easy External Installation

Designed for 2-hole external mounting, the valve can be seamlessly integrated into most industrial cabinets, battery housings, explosion-proof boxes, or pressure-sensitive containers. No complex setup or calibration is required.

Technical Specifications

The PD04A2K-50 explosion-proof air vent valve is suitable for a wide range of industries and high-risk environments:

• Chemical processing plants – control of flammable gas accumulation

• Battery packs and energy storage systems – safe pressure venting

• Oil and gas refineries – hazardous area ventilation

• Explosion-proof electrical enclosures – IP68-rated valve sealing

• Lithium battery cabinets – venting and flame arrest

• Hazardous goods containers – emergency pressure release

• Flammable vapor storage – controlled ventilation

• Outdoor power systems – waterproof and dustproof safety design

Why Choose PD04A2K-50?

Explosion Prevention + Unidirectional Flow Control
Ingress Protection IP68/6K9K for Harsh Environments
Large Exhaust Area (620 mm²) for Efficient Pressure Release
3–5 kPa Activation Pressure for Intelligent Operation
Robust Aluminum Alloy Construction for Longevity
Ideal for Hazardous, Flammable, or Dusty Conditions

Whether you're designing equipment for Zone 1/2 classified areas, managing battery energy storage systems (BESS), or upgrading ATEX-compliant cabinets, this one-way explosion-proof check valve is a vital component in any safety-critical system.

FAQ – One-Way Ventilation Explosion-Proof Valve (PD04A2K-50)

1. What is a One-Way Ventilation Explosion-Proof Valve?

A One-Way Ventilation Explosion-Proof Valve is a safety device that allows internal pressure to be released in a single direction while preventing external gases, dust, or moisture from entering. It is designed to protect electrical enclosures, battery cabinets, and hazardous equipment in explosive or high-risk environments.

2. What industries typically use this valve?

It is widely used in industries such as:

• Chemical processing

• Oil & gas

• Energy storage (BESS)

• Battery manufacturing

• Power transmission systems

• Hazardous material containment

• Explosion-proof equipment enclosures

3. What is the protection rating of the PD04A2K-50 valve?

This valve meets IP68/6K9K standards, meaning it offers complete protection against dust, and can withstand continuous submersion in water and high-pressure cleaning, making it suitable for both indoor and outdoor industrial applications.

4. What is the activation (turning) pressure?

The valve automatically opens when the internal pressure reaches 3–5 kPa, ensuring timely pressure relief without compromising the sealed system’s integrity.

5. Does the valve require a waterproof and breathable membrane?

No. The PD04A2K-50 is a unidirectional explosion-proof valve without a waterproof and breathable membrane, but still maintains high-level waterproof and dustproof performance due to its precise structural design and material choice.

6. What is the installation method?

The valve uses a 2-hole external mounting system, allowing for quick and secure installation on a variety of enclosures and equipment surfaces.

7. What materials are used in the valve construction?

The valve body is made of high-strength aluminum alloy, which offers excellent corrosion resistance, mechanical durability, and thermal stability.

8. Can this valve be customized for different pressure settings or airflow rates?

Yes. Custom versions with different turning pressures or air permeability rates can be developed to suit specific applications. Contact our sales team for details.