Introducing BADA-VEX ATEX Non-Return Valve

The BADA-VEX ATEX non-return valve is designed to prevent the spread of overpressure or flames caused by downstream explosions in industrial dust collectors and filters. It acts as a one-way barrier, closing automatically during explosions and staying locked to stop flame propagation.
This product is effectively designed to handle a wide range of organic, synthetic, and metal dusts. It provides reliable protection against explosions by preventing the backward flow of flames and pressure in the installation, safeguarding personnel, equipment and the surrounding environment. The valve's advanced design ensures seamless operation and enhances overall system safety in industrial settings.


Product Overview

The BADA-VEX ATEX non-return valve is designed to efficiently handle organic, synthetic and metal dusts with a maximum Kst of 250 (St2) according to the ATEX Directive 2014/34/EC. Produced in sizes ranging from Ø160 up to Ø800, it offers an efficient solution for various industrial applications. This non-return valve is meticulously engineered ensuring durability and reliability in ATEX environments.


Product Features

  • An exterior arrow indicator shows the exact position of the inner flap at all times.
  • The BADA-VEX non-return valve incorporates a blade spring system on the side of the body, which interacts with an exterior arm directly consolidated with the inner flap of the valve.
  • In the event of an explosion, the inner flap is forcefully pushed down, compressing the coil spring and locking the flap in place.
  • It features a secondary blade spring system designed to hold the inner flap in the open position when used under specific conditions.
  • The non-return valve is factory equipped with earthing bolts, earthing straps and a safe zone locking detection sensor.

Product Benefits

  • Versatility:
    With a wide range in sizes and the ability to handle various types of dusts, the BADA-VEX offers unparalleled flexibility to suit diverse industrial requirements.
  • Enhanced Safety:
    The inner flap locking mechanism and ATEX certification ensure reliable explosion protection, minimizing risks and adhering to stringent safety regulations.
  • Improved Performance:
    The BADA-VEX's inner flap design reduces the pressure loss while being extremely sensitive to an explosion.
  • Diverse installation possibilities:
    The valve supports both horizontal and vertical mounting, in loaded and clean air applications making it the most versatile ATEX non-return valve yet.

General Overview

Body : Painted steel
Flap: Round domed flap: Stainless steel
Diameter: ø160mm to ø800mm
EPDM FDA Gasket: -30°C to +70°C/-22°F to 158°F
Flanges : ISO and ANSI flanges design
Inductive Sensor: Non ATEX closing indication sensors in case of explosion or overpressure


EN 16447
EN 15089

Low pressure loss

Non dust accumulation design

By aligning the lower part of the BADA-VEX ATEX non-return valve with the piping, a continuous self-cleaning action is achieved through the airflow, resulting in a minimal pressure drop.

Available in both horizontal and vertical positions, dirty and clean air sides.

Pressure Drop Curves

In Flow Process (Loaded Air)

In Flow Process (Loaded Air)

Reverse Process (Clean Air)

Reverse Process (Clean Air)



Technical features comparison for a quick selection.


* Clean air side and vertical mounting achieved by holding the flap in open position with some restrictions applied (distance, airspeed, etc.).
** The min distance is different in function of some installation parameters, see user guide.

Enhance Your Workplace Safety:

ATEX System for Dust Extraction Installation

Formula Air is your one-stop solution for ATEX-certified products to ensure the safety and compliance of your installation. We offer a comprehensive range of ATEX-certified components, including:

  1. RVA-X Rotary valve
  2. ATEX Explosion isolation valve
  3. ATEX Filter
  4. ATEX Fan
Standard ATEX-compliant installation
Example of an ATEX compliant installation

Formula Air remains committed to innovation and delivering cutting-edge solutions to its customers. The introduction of the BADA-VEX ATEX non-return valve is a testament to this commitment, offering industry professionals a reliable, efficient, and versatile solution for their dust handling needs.

To order BADA-VEX ATEX non-return valve and explore its comprehensive features and benefits, please visit the Formula Air E-catalogue and request a quote.