Ozone is a powerful tool in modern gas treatment and disinfection processes, but residual ozone must be safely and efficiently removed before air or gas is released into the environment. The CDU-15 Ozone Destruct Device is specifically designed for this purpose—providing safe, reliable, and effective catalytic ozone destruction for small-scale gas flows up to 15 LPM.
Key Features of the CDU-15
- Flow Capacity: 15 LPM in dry ozone gas applications
- Material Construction: Stainless steel body with Carulite-200 catalyst
- Connections: ¼” Female NPT inlet and outlet
- Orientation: Vertical installation only, with inlet at the bottom and the cap on top
- Dry or Wet Gas Compatible: For wet gas streams, a heater element is required
How It Works
The CDU-15 uses a true catalytic destruction method, converting ozone (O₃) to oxygen (O₂) without generating hazardous by-products or requiring consumables. The heart of the system is Carulite-200, a hopcalite-type catalyst made of manganese dioxide and copper oxide, delivering 99.96% ozone destruction efficiency under proper flow and temperature conditions.
When to Use the CDU-15
The CDU-15 is ideal for low-flow applications using dry ozone gas, such as:
- Laboratory or pilot-scale ozone systems
- Ozone off-gas treatment from generators using dry air or oxygen
- Equipment exhaust scrubbing
For ambient or wet gas applications, a model with heating capability, such as the CDU-30, is recommended.
Understanding Gas Conditions: Dry vs. Wet
Dry Gas
- Sourced directly from ozone generators using oxygen or dry air
- Dew point typically -40°F or lower
- Heater not required
Wet Gas
- Gas containing water vapor or risk of condensation
- Often found in ozone off-gas from water systems
- Heater required to prevent condensation on catalyst
- For high humidity (>30%), consider wet ratings; over 50%, a heater is strongly recommended
Replaceable Catalyst System
The Carulite-200 catalyst is designed for long life but will degrade over time due to dust, moisture, or chemical exposure. The CDU-15 makes replacement simple:
- Remove the top cap
- Empty and replace the catalyst material
- Reinstall the screen and gasket
Maintenance time: Less than 30 minutes
Complete rebuild kits are available and include replacement screens, gaskets, and fresh catalyst.
Frequently Asked Questions
What type of ozone destruct unit do I need?
Consider ozone concentration, humidity, and gas source:
- High concentration (>1 ppm ozone): CDU series
- Ambient ozone (<1 ppm): Use units designed for low ozone concentrations
- Wet or dry gas: Wet gas requires heating to prevent condensation
What is Carulite-200?
Carulite-200 is a catalyst made from manganese dioxide and copper oxide. It efficiently decomposes ozone into oxygen with no consumables and minimal environmental impact. Safe to handle with dust protection.
How long does Carulite-200 last?
- Dry gas: Several years
- Wet gas: At least 1 year
Replace annually for optimal performance and safety.
What if the catalyst gets wet?
- Best option: Replace it
- Alternate method: Bake at 500°F to dry and restore performance
Is it safe to dispose of Carulite-200?
Yes, under normal conditions. If contaminated with hazardous substances, follow appropriate disposal protocols.
When to Consider the CDU-30 Instead
If you’re working with wet gas or need higher flow rates, the CDU-30 model includes heating options and is optimized for moisture-laden environments. Contact us for help determining the best model for your application.
Final Thoughts
The CDU-15 Ozone Destruct Device is a compact and effective solution for destroying ozone in dry gas streams up to 15 LPM. With replaceable catalyst media, stainless steel durability, and no consumables, it’s a cost-effective and low-maintenance option for small-scale or portable ozone systems.
You can find this product here: https://www.oxidationtech.com/cdu-15.html
