Three Way Catalyst and Universal Catalytic Converter

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Your Professional Three Way Catalyst and Universal Catalytic Converter Manufacturer & Supplier

Founded in 2010, Jiangxi CAS Kerry Pro-enviroment Catalyst Co. , Ltd is a tech-driven enterprise specializing in R&D and production of eco-friendly catalysts. Boasting a 13,000㎡ R&D and manufacturing base, we offer diverse catalysts for waste incineration, VOCs removal, exhaust purification, etc., plus custom solutions.

Why Choose Us

Professional Team

The company has 51 employees, including 18 R&D engineers, among whom are 3 PhDs and 10 senior technical experts, forming a strong and experienced technical team.

Certifications & Achievements

We hold 1 national invention patent and 6 utility model patents, along with national and provincial key new product certifications. The company has also undertaken national and provincial innovation projects and received multiple science and technology awards at provincial and municipal levels, demonstrating strong R&D capability and industry recognition.

Customization Services

In addition to standard catalyst products, we provide tailored solutions based on specific client requirements, including size, performance, and application conditions, ensuring optimized solutions for different industrial needs.

Advanced Production Equipment

Equipped with mesh belt resistance furnaces, electric reduction furnaces, a 7230G spectrophotometer, and intelligent drying systems, we maintain precise production control and consistent product quality to ensure reliable catalyst performance.

Three Way Catalyst Specification

Item	Specification
Product Name	Three Way Catalyst
Application	Gasoline engine emission control
Substrate Type	Metal foil / ceramic honeycomb
Cell Density (CPSI)	100–400 CPSI
Catalyst	Platinum / Palladium / Rhodium
Housing Material	Stainless steel (SS304 / SS409)
Operating Temperature	200°C – 900°C
Function	Reduces CO, HC, and NOx
Structure	High-temperature resistant honeycomb design
Installation	Universal fit / weld-on type
Flow Design	Low back pressure, high efficiency
Customization	Size and coating available

Advantages of Three Way Catalyst

Controls all three major pollutants

Required to meet modern emission standards

Improves overall combustion efficiency when integrated with O₂ sensors

Working Process of Three Way Catalyst

In the three-way catalyst, reactions between CO, HC, and NOxresult in the simultaneous removal of all three major exhaust pollutants. One of the fundamental chemical reactions occurring in the three-way catalyst can be written as follows:

CO + NO = CO2 + 1/2 N2
Concentrations of pollutants in the exhaust gas depend on the fuel mixture composition. At lean fuel mixtures the exhaust gases contain little carbon monoxide or hydrocarbons but high concentrations of NOx. Rich mixtures produce high concentrations of CO and HC with little NOx. In order to achieve high simultaneous conversions of CO and NOx, their concentrations in the exhaust must be in stoichiometric proportion, as illustrated by the above equation.

In practice, three-way catalysts are used with air to fuel ratio controllers which maintain the mixture composition at stoichiometric. These controllers utilize a feedback signal from the oxygen sensor positioned in front of the catalyst in the exhaust system. The range of A/F ratio required for satisfactory catalyst operation is known as the "catalyst window". Precise A/F ratio control is especially important for efficient NOx control, as the nitrogen oxides conversion drops dramatically at lean fuel mixtures.

Structure of Three Way Catalyst

The basis of a three way catalysts are Very thin, high-temperature stable foils made of heat-resistant alloys. A special winding of the films gives the catalyst carrier a honeycomb structure. A special coating containing precious metals is applied to the wound metal foils to reliably reduce pollutants.

Universal Catalytic Converter Specification

Item	Specification
Product Name	Universal Catalytic Converter
Application	Gasoline vehicles / light-duty engines
Substrate Type	Ceramic or metallic honeycomb
Cell Density (CPSI)	100–400 CPSI
Catalyst	Platinum / Palladium / Rhodium
Housing Material	Stainless steel (SS304 / SS409)
Inlet/Outlet Size	Universal fit (customizable)
Operating Temperature	200°C – 900°C
Function	Reduces CO, HC, NOx emissions
Installation	Weld-on / universal fit design
Flow Design	High-flow, low back pressure
Customization	Size and structure available

Key Characteristics of Universal Catalytic Converter

Standardized sizes

Available in common pipe diameters and lengths

Custom installation

Often requires cutting, welding, or clamping

Multi-vehicle compatibility

Works on cars, SUVs, and light trucks

Lower cost

Typically less expensive than direct-fit converters

The Mechanism of Action of Universal Catalytic Converter

Whenever your engine burns fuel, it produces pollutants such as:

Carbon monoxide (CO)
Hydrocarbons (HC)
Nitrogen oxides (NOx)
A universal catalytic converter sits in the exhaust system—typically between the engine and the muffler—and converts these harmful gases into safer byproducts before they exit the tailpipe.

Key Reactions Inside the Universal Catalytic Converter

NOx reduction

Nitrogen oxides are broken into nitrogen and oxygen

CO oxidation

Carbon monoxide is converted into carbon dioxide

HC oxidation

Unburned fuel becomes water vapor and carbon dioxide

Universal vs Direct Fit Catalytic Converter

Feature	Universal	Direct Fit
Installation	Requires welding	Bolts in
Cost (part)	Lower	Higher
Cost (install)	Higher (welding labor)	Lower (DIY-friendly)
Vehicle compatibility	Universal (any vehicle)	Specific Year/Make/Model
O2 sensor bungs	Need to be welded in	Pre-installed

Customization Services

To better meet the diverse needs of different industries and applications, we provide customized industrial catalytic converters based on specific operating conditions, equipment type, exhaust gas composition, and performance requirements. For more information or support, please feel free to contact us.

Packaging and Shipping

Packaging	Export-grade cardboard boxes or wooden crates
Transportation methods	Sea, Air, and Land Transport

Our Certificate

FAQ

Q: How does a three-way catalyst work?

A: It works through chemical reactions on a honeycomb substrate coated with precious metals such as platinum, palladium, and rhodium. CO and HC are oxidized, while NOx is reduced, all within a properly controlled air-fuel ratio close to stoichiometric conditions.

Q: What is the difference between a three-way catalyst and a universal catalytic converter?

A: A three-way catalyst refers to the emission-reduction technology, while a universal catalytic converter refers to the physical design and installation type. A universal converter can contain a three-way catalyst inside.

Q: Where are they commonly used?

A: Three-way catalysts are widely used in gasoline passenger cars and light-duty vehicles. Universal catalytic converters are used in aftermarket repairs, exhaust system modifications, and vehicles where OEM direct-fit parts are not available.

We're well-known as one of the leading three way catalyst and universal catalytic converter manufacturers and suppliers in China. With over 15 years' experience, we warmly welcome you to buy high quality three way catalyst and universal catalytic converter made in China here from our factory. Customized orders are welcome.

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