COAX Certificated Valves

Certificated valves from müller co-ax gmbh are engineered to meet stringent industry standards, ensuring safety and reliability across various applications. These valves are available in multiple configurations, including DVGW-certified models for gaseous fuels, TÜV-certified versions for liquid fuels, and ATEX-certified options for explosive environments. With nominal widths ranging from 1.5 to 50 mm and pressure capacities up to 500 bar, they provide dependable performance in demanding conditions.

COAX MK / FK DVGW Series Certificated Valves

The COAX MK / FK DVGW-certified valves are direct-acting 2/2-way solenoid valves, ideal for safety shut-off in fuel supply systems. Available in sizes DN 15 to DN 25, with a pressure range from PN 0 to 40 bar, these valves feature a pressure-balanced, spring-return mechanism within a nickel-plated steel body. Sealing options include PTFE, FPM, and specialised materials. Operating on either DC 24 V or AC 230 V, they close within one second upon voltage loss, ensuring safe containment of flammable gases in compliance with G260.

Valve Type: 2/2-way valve
Operating Method: Direct Actuated
Valve Design: Pressure Balanced, with Spring Return
Media: Combustible Gases acc. G260
Find Out More

COAX KBS Ex Series Certificated Valves

The COAX KBS Ex-certified 2/2-way valve is a direct-actuated, spring-return model designed for dependable shut-off in demanding applications. With orifice sizes ranging from DN 1.5 to 3 and a pressure capacity up to PN 500 bar, it offers threaded ports and is available in brass, nickel-plated brass, or stainless steel. Suitable for gaseous and liquid media, it includes NBR, FPM, or custom seals. Certified to Ex-protection standards II 2 G Eex me II T4 and II 2 D IP 65 T 130°C, it ensures safety in volatile environments.

Valve Type: 2/2-way valve
Operating Method: Direct Actuated
Valve Design: Direct Acting, with Spring Return
Media: Gaseous, Liquid
Find Out More

COAX KB / MK / FK Ex Series Certificated Valves

The COAX KB / MK / FK Ex Certified Valves are direct-acting, 2/2-way solenoid valves featuring a pressure-balanced design with spring return. Offered in DN 2 to 50, these valves operate under pressures from PN 0 to 100 bar, with threaded or flanged ports. Built from brass, nickel-plated, galvanised, or stainless steel, they handle gaseous, liquid, and high-viscosity media. These safety shut-off valves, certified for rapid closure within one second, ensure dependable sealing when voltage drops, in either DC 24 V or AC 230 V options.

Valve Type: 2/2-way valve
Operating Method: Direct Actuated
Valve Design: Pressure Balanced, with Spring Return
Media: Gaseous, Liquid, Highly Viscous, Contaminated
Find Out More

COAX MK / FK DR Ex Series Certificated Valves

The COAX MK / FK DR Ex Certified Valves are direct-acting 3/2-way safety shut-off valves, ideal for handling gaseous, liquid, viscous, and contaminated media. Available in sizes DN 10 to DN 50, they support pressures from 0 to 40 bar and are constructed in brass, nickel-plated, galvanised, or stainless steel with seal options like NBR, PTFE, FPM, CR, and EPDM. Featuring threaded or flanged connections, a spring-return, pressure-balanced design, and rapid shut-off within one second, they operate on DC 24V or AC 230V for reliable, prompt shut-off.

Valve Type: 3/2-way valve
Operating Method: Direct Actuated
Valve Design: Pressure Balanced, with Spring Return, Switching Overlap
Media: Gaseous, Liquid, Highly Viscous, Contaminated
Find Out More

COAX MK / FK TUV Series Certificated Valves

The TÜV-certified COAX MK / FK 2/2-way solenoid valves are direct-acting and pressure-balanced, using a spring-return design for fast shut-off within a second if voltage is lost. Available in DN 10-25 sizes, they handle pressures from PN 0 to 40 bar with options for threaded or flanged connections. Constructed from brass and galvanised steel with FPM and PTFE seals, these valves are suitable for liquid fuels and operate at DC 24V or AC 230V, offering dependable performance for critical safety applications.

Valve Type: 2/2-way valve
Operating Method: Direct Actuated
Valve Design: Pressure Balanced, with Spring Return
Media: Liquid Fuels
Find Out More

COAX MK / FK DR TUV Series Certificated Valves

The COAX MK / FK DR TÜV certified 3/2-way direct-actuated safety shut-off valves feature galvanised steel bodies with FPM and PTFE seals, ideal for liquid fuel applications. Offering orifice sizes from DN 15 to DN 25, they support pressures from PN 0 to 40 bar and come with threaded or flanged connections. Equipped with a pressure-balanced spring return and switching overlap, these valves close within one second if voltage is lost, effectively safeguarding fuel flow. Voltage options include DC 24 V and AC 230 V.

Valve Type: 3/2-way valve
Operating Method: Direct Actuated
Valve Design: Pressure Balanced, with Spring Return, Switching Overlap
Media: Liquid Fuels
Find Out More

Valve Certifications

DVGW CERT GmbH

The DVGW variant comprises valves specifically certified for gaseous fuels in accordance with DVGW G 260 (A) standards, making them suitable for applications involving gas burners. This version ensures compliance with industry standards for safe and efficient operation in gas-based systems. The available nominal widths include 15, 20, and 25 mm, offered in a durable steel-nickel-coated finish, providing corrosion resistance and longevity.

TÜV (Technical Inspection Association)

The TÜV model is a valve tailored for use with liquid fuels, carrying approval under the DIN EN ISO 23553-1 standard, and is intended specifically for oil burner systems. This version adheres to strict safety and operational standards for liquid fuel applications. Nominal widths offered are 10, 15, 20, and 25 mm, each in a galvanised steel finish that enhances durability and protects against environmental factors.

ATEX (ATmosphère EXplosible)

ATEX-certified solenoid valves, available with two or three connections and two switching positions, meet ATEX Zone 1 Category 2 requirements, excluding mining. Ranging from 1.5 to 50 mm in width, these valves support pressures from vacuum up to 500 bar. Flow rates (KV values) vary from several litres to 28 m³/h, with configurations offered in socket or flange versions and always with a junction box. 

Frequently Asked Questions

COAX Certificated Valves are type-tested solenoid valves designed for safety shut-off applications. They feature two or three connections and two switching positions, ensuring rapid closure within one second during voltage drops to reliably halt fuel supply.

COAX Certificated Valves possess various certifications, including DVGW for gaseous fuels, TÜV for liquid fuels, and ATEX for explosive environments. These certifications confirm compliance with stringent safety and performance standards.

These valves are utilized across multiple industries such as oil and gas, chemical processing, and manufacturing, particularly in applications requiring rapid and reliable shut-off mechanisms.

Depending on the model, COAX Certificated Valves can manage pressures from vacuum levels up to 500 bar, accommodating a wide array of industrial applications.

The valves are available in nominal sizes ranging from 1.5 mm to 50 mm, allowing for flexibility in various system designs.

These valves are constructed from materials selected based on specific operating conditions, ensuring compatibility with the media and durability under designated pressures and temperatures.

Yes, certain models are ATEX-certified, making them suitable for use in explosive atmospheres where gases and dusts are present.

These valves are engineered to close within one second upon voltage loss, ensuring prompt and reliable shut-off in critical situations.

By rapidly sealing closed during voltage drops, these valves effectively prevent unintended fuel flow, thereby enhancing safety in fuel supply systems.

Regular maintenance involves inspecting for wear, ensuring proper operation, and adhering to manufacturer guidelines to maintain optimal performance and safety.

Yes, these valves are designed to manage both gaseous and liquid media, with specific certifications like DVGW for gases and TÜV for liquids.

COAX Certificated Valves provide distinct advantages over traditional valves, including a pressure-balanced, coaxial design that maintains consistent performance across various pressures. They feature rapid actuation, switching as fast as 25 milliseconds, making them ideal for time-sensitive applications. Their maintenance-free design reduces wear, even with contaminated media, leading to extended service life. These valves support bi-directional flow, enhancing flexibility in system design, and their compact structure is suited to space-limited installations. Overall, COAX Certificated Valves offer reliability, efficiency, and versatility for demanding industrial applications.

FAQ

Request more information or Advice

Please feel free to request information and advice using the form below or call us on 0151 547 1221

COAX Certificated Valves