COAX Coaxial Valves

Coaxial valves are engineered to handle high pressures and extreme conditions, providing reliable control for gases, liquids, and aggressive media. Suitable for various industries, they utilise a unique axial design that minimises wear and enables rapid opening and closing. Options like the MK and FK series offer flexibility in actuation, with configurations tailored for both standard and challenging environments. These valves ensure efficient flow control and reduced maintenance, supporting enhanced operational efficiency across applications.

COAX MK / FK Series Coaxial Valves

The COAX MK and FK coaxial valve series provides adaptable solutions for multiple pressure requirements. The MK 10 variant, featuring a 10 mm orifice and threaded connection, handles pressure ranges from 0 to 40 bar with a Kv value of 2.5 m³/h. Larger models, like the MK/FK 50 with a 50 mm orifice, support up to 16 bar and reach a Kv of 38 m³/h. Available in sizes from 10 to 80 mm, these valves offer threaded and flanged connections, optimising flow control across varied pressures and flow rates.

Valve Type: 2/2-way valve
Operating Method: Direct Actuated
Valve Design: Pressure Balanced, with Spring Retum
Media: Gaseous, Liquid, Highly Viscous, Contaminated
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COAX MK / FK DR Series Coaxial Valves

The COAX MK / FK DR 3/2 Way Direct Acting Coaxial Valves offer pressure-balanced, spring-return functionality, ideal for diverse media such as gases, liquids, viscous substances, and contaminated fluids. Available with DN10 to DN80 orifices and a pressure range of PN 0–40 bar, they come with threaded or flanged connections and hermetically sealed bodies in materials like aluminium, brass, galvanised steel, and stainless steel. Seal options include NBR, PTFE, FPM, CR, and EPDM, with compatibility for DC 24V and AC 230V for dependable, leak-free operation.

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
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COAX CFM Series Coaxial Valves

The COAX CFM 2/2-way externally controlled coaxial valve provides adaptable control across a range of media, including emulsions, oils, and neutral gases. Featuring a DN 8 orifice and a pressure range from PN 0 to 40 Bar, this threaded, pressure-balanced valve is offered in brass or stainless steel to suit diverse applications. With a spring return mechanism, it operates on DC 24 V or AC 230 V. Available seals—NBR, FPM, PE, PU, and PTFE—are selected according to media type, though requirements may differ by application.

Valve Type: 2/2-way valve
Operating Method: Externally Controlled
Valve Design: Pressure Balanced, with Spring Return
Media: Emulsions, Oils, Neutral Gases
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COAX VMK / VFK Series Coaxial Valves

The COAX VMK 2/2-way externally controlled coaxial valves are designed for a wide range of applications, effectively managing gases, liquids, thick fluids, and contaminated substances. Offered in orifice sizes DN10 to DN50, they operate within a pressure scope of PN 0-100 bar, with threaded or flanged port options. Built with materials like brass, galvanised and stainless steel, and nickel plating, these valves include a pressure-balanced structure with spring return, plus NBR, PTFE, FPM, CR, EPDM, and specialised seal choices.

Valve Type: 2/2-way valve
Operating Method: Externally Controlled
Valve Design: Pressure Balanced, with Spring Return
Media: Gaseous, Liquid, Highly Viscous, Contaminated
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COAX VMK / VFK DR Series Coaxial Valves

The COAX VMK/VFK 3/2-way externally controlled coaxial valves deliver accurate control with orifice sizes ranging from DN10 to DN50 and pressure ratings up to PN100 bar. These valves incorporate a pressure-balanced design with a spring return and switching overlap, accommodating both threaded and flanged connections. Built from brass, galvanised or stainless steel, and nickel-plated brass or steel, they feature NBR, PTFE, FPM, CR, EPDM, and other specialised seals, efficiently handling gaseous, liquid, viscous, and contaminated media at DC 24V or AC 230V.

Valve Type: 3/2-way valve
Operating Method: Externally Controlled
Valve Design: Pressure Balanced, with Spring Return, Switching Overlap
Media: Gaseous, Liquid, Highly Viscous, Contaminated
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COAX VSV-M / VSV-F Series Coaxial Valves

The COAX VSV-M / VSV-F 2/2-way externally controlled coaxial valves deliver effective flow control for gases, liquids, highly viscous substances, and contaminated media across pressures up to 40 bar. With a pressure-balanced, spring-return design, these valves are available in sizes DN 40 to 250, offered with either threaded or flanged ports. Constructed from aluminium, galvanised and stainless steel, or nickel-plated steel, they operate at DC 24 V or AC 230 V, with seals in materials including NBR, PTFE, FPM, CR, and EPDM.

Valve Type: 2/2-way valve
Operating Method: Externally Controlled
Valve Design: Pressure Balanced, with Spring Return
Media: Gaseous, Liquid, Highly Viscous, Contaminated
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COAX VSV-M / VSV-F DR Series Coaxial Valves

The COAX VSV-M / VSV-F DR 3/2-way externally controlled coaxial valves provide precise fluid control across various pressures (PN 0-40 bar) and sizes (DN 40-150). Featuring pressure-balanced designs, spring returns, and switching overlaps, these valves are ideal for gaseous, liquid, viscous, or contaminated media. Available in aluminium, galvanised, nickel-plated, or stainless steel bodies with NBR, PTFE, FPM, CR, EPDM, or specialised seals, they operate on DC 24V or AC 230V with threaded or flanged ports.

Valve Type: 3/2-way valve
Operating Method: Externally Controlled
Valve Design: Pressure Balanced, with Spring Return, Switching Overlap
Media: Gaseous, Liquid, Highly Viscous, Contaminated
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COAX FCK-K Series Coaxial Valves

The COAX FCK-K 2/2-way externally controlled coaxial valve ensures dependable flow control for varied applications. Built with a flanged port, this valve accommodates orifice sizes from DN 65 to DN 125 and manages pressures up to 40 bar. Its pressure-balanced design, equipped with a spring return, is ideal for emulsions, oils, and neutral gases. Offered with an aluminium or hard-coated aluminium body and seal options including NBR, PU, PTFE, and FPM, it operates on DC 24 V or AC 230 V, allowing adaptable performance.

Valve Type: 2/2-way valve
Operating Method: Externally Controlled
Valve Design: Pressure Balanced, with Spring Return
Media: Emulsions, Oils, Neutral Gases
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COAX FCF Series Coaxial Valves

The COAX FCF 2/2-way externally controlled coaxial valve provides reliable flow control for emulsions, oils, and neutral gases. Featuring a pressure-balanced design with a spring return mechanism, it accommodates orifice sizes from DN 65 to DN 125 and operates across a pressure range of PN 0 to 40 bar. This flanged valve is available in aluminium or hardcoated aluminium, with sealing options in NBR, PU, PTFE, FPM, and PE, supporting DC 24 V and AC 230 V, making it adaptable to various industrial uses.

Valve Type: 2/2-way valve
Operating Method: Externally Controlled
Valve Design: Pressure Balanced, with Spring Return
Media: Emulsions, Oils, Neutral Gases
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What are coaxial valves?

Coaxial valves are advanced flow control devices engineered with a unique design where the valve seat, control tube, and actuator are aligned along a common axis. This coaxial configuration ensures pressure-balanced operation, allowing the valve to function effectively across a wide range of pressures, from vacuum conditions to high-pressure environments. The design minimises wear, even when handling contaminated media, resulting in maintenance-free performance and extended service life. Additionally, coaxial valves offer rapid actuation times, with some models achieving switching speeds as fast as 25 milliseconds, making them ideal for applications requiring precise and swift flow control.

The compact and versatile nature of coaxial valves makes them suitable for various industries, including mechanical and plant engineering, vacuum and gas technology, test bench construction, and filling and dosing systems. Their ability to handle diverse media—such as gases, liquids, viscous substances, and even abrasive materials—without compromising performance underscores their adaptability. Furthermore, the bi-directional flow capability of coaxial valves eliminates the need for multiple valves in systems where flow direction may alternate, thereby simplifying system design and reducing installation space requirements.

What are their advantages?

Pressure Balanced Design:

The coaxial design ensures balanced internal forces within the valve, maintaining consistent performance regardless of system pressure or differential pressure. This design provides precise, reliable control, whether managing vacuum or high-pressure applications. Unlike traditional valves, coaxial valves operate effectively without needing a minimum pressure differential, making them suitable for a wider range of fluid control tasks across varying conditions.

Maintenance Free & Dirt Resistant:

The innovative coaxial valve design reduces valve seat wear, even in heavily contaminated media. Featuring a unique construction with a single moving part, and no stem seal or external actuator, coaxial valves are entirely maintenance-free. Built to withstand extreme conditions, these valves offer durability and achieve lifespans up to 10 times longer than conventional options, making them a reliable choice for demanding applications.

Frequently Asked Questions

Coaxial valves are used in applications requiring reliable flow control in systems with high contamination levels, pressure, or extreme temperatures.

Coaxial valves operate with a unique inline design featuring a single moving part that opens or closes to control flow, providing efficient and wear-resistant performance.

Unlike conventional valves, coaxial valves have a streamlined design with no stem seal or external actuator, reducing wear and extending the valve's service life.

Coaxial valves are maintenance-free due to their simple design, which has no stem seals or external actuators to replace or service.

Coaxial valves can have a lifespan up to 10 times longer than conventional valves, even under challenging operating conditions.

Yes, coaxial valves are ideal for applications with contaminated media, as their design minimises wear on the valve seat, ensuring reliable operation.

Coaxial valves are commonly used in industries such as oil and gas, chemical processing, and wastewater treatment, where durability and reliability are crucial.

Yes, coaxial valves are designed to handle high-pressure applications, providing consistent performance under extreme pressure conditions.

Coaxial valves are available in various sizes to accommodate different flow requirements, typically ranging from small DN sizes to larger specifications.

Coaxial valves are suitable for high-temperature applications, as their design allows them to maintain functionality under extreme temperatures.

The unique inline design of coaxial valves reduces friction and wear on the valve seat, even when dealing with heavily contaminated media.

Coaxial valves are commonly manufactured from materials like stainless steel and aluminium to withstand harsh environments and ensure long-term use.

FAQ

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COAX Coaxial Valves