Coaxial Valves
High-precision control
for high pressures and demanding media
What are coaxial valves?
Coaxial valves feature a unique, pressure-balanced design. An internal control tube moves axially within the housing, enabling a straight-through flow path. This diversion-free construction ensures reliable control of extreme pressures and challenging media – where conventional valves tend to jam or suffer rapid wear.
Technical features and options
Discover the key technical characteristics of coaxial valves – a compact overview of their key technical features.
Advantages at a glance
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Pressure balanced: Allows switching of high pressures with low magnetic force.
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For demanding media: Reliable with contaminated, abrasive or viscous media thanks to straight-through flow.
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Bidirectional: Suitable for flow in both directions and vacuum applications.
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Fast switching times & long service life: The robust and direct design ensures reliability and longevity.
Typical areas of application
High-pressure pneumatics and hydraulics
Gas control in the automotive and aerospace industries
Dosing in the food and chemical industries
Vacuum applications in mechanical engineering
Available configurations
Types: 2/2-way and 3/2-way
Modes of operation: Normally closed (NC) and normally open (NO)
Actuation types: directly controlled and remotely controlled
Materials & filters: Housings, seals and filters are available in various materials (e.g. brass, stainless steel V4A, aluminum) for maximum media resistance.
Seamless integration: control-valve compatible
For precise dosing and control tasks, our coaxial valves can be seamlessly combined with matching control valves to form a high-performance system. This combination of robust construction and precise actuation is ideal for demanding process environments.
Our coaxial valves
Precision and reliability for demanding applications.
266
Design 2/2-way
Actuation type direct controlled
Nominal diameter 2.0 mm - 6.0 mm
Pressure range 0.00 - 100.0 bar
KV value 2.5 - 9.5 l/min
Temperature medium -10 to +100°C
Connection G1/4, G3/8
small nominal diameter -
high pressures
267
Ideal for
Gas applications
Design 2/2-way
Actuation type direct controlled
Nominal width 1.0 mm - 6.0 mm
Pressure range 0.00 - 300.0 bar
KV value 0.7 - 10.7 l/min
Temperature medium -10 to +100°C
Connection G1/4, G3/8
269
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 25.0
Pressure range 0.00 - 20.0 bar
KV value 2.5 - 12.3 m³/h
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4,
G1, G1 1/4
270
classic
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 40.0 bar
KV value 2.5 - 47.2 m³/h
Temperature medium -10 to +100°C
Connection see table
271
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range 0.00 - 64.0 bar
KV value 2.5 - 20.0 m³/h
Temperature medium -10 to +100°C
Connection see table
272
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range 0.00 - 100.0 bar
KV value 2.5 - 20.0 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection see table
270-X
classic
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 40.0 bar
KV value 2.5 - 47.2 m³/h
Housing material brass, aluminium
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2, G2
​
271-X
​
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range 0.00 - 64.0 bar
KV value 2.5 - 20.0 m³/h
Housing material brass, aluminium
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2
272-X
​
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range 0.00 - 100.0 bar
KV value 2.5 - 20.0 m³/h
Housing material brass, aluminum
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2
280
Robust
Design 2/2-way
Actuation type externally controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 64.0 bar
KV value 2.7 - 47.2 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection see table
​
281
Design 2/2-way
Actuation type externally controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 120.0 bar
KV value 2.7 - 47.2 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection see table
282
Design 2/2-way
Actuation type externally controlled
Nominal diameter 10.0 mm - 25.0 mm
Pressure range 0.00 - 160.0 bar
KV value 2.7 - 14.5 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection see table
280-X
Design 2/2-way
Actuation type externally controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 64.0 bar
KV value 2.7 - 47.2 m³/h
Housing material brass, aluminium
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2, G2
281-X
Design 2/2-way
Actuation type externally controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 120.0 bar
KV value 2.7 - 47.2 m³/h
Housing material brass, aluminium
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2, G2
282-X
Design 2/2-way
Actuation type externally controlled
Nominal diameter 10.0 mm - 25.0 mm
Pressure range 0.00 - 160.0 bar
KV value 2.7 - 14.5 m³/h
Housing material brass, aluminium
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4
283
Maximum pressure
Design 2/2-way
Actuation type externally controlled
Nominal diameter 15.0 mm
Pressure range 0.00 - 200.0 bar
KV value 7.2 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection G3/8, G1/2, G3/4
283-X
Design 2/2-way
Actuation type externally controlled
Nominal diameter 15.0 mm
Pressure range 0.00 - 200.0 bar
KV value 7.2 m³/h
Housing material brass, aluminium
Temperature medium -10 to +100°C
Connection G1/2, G3/4, G1, G1 1/4
286
extremely compact
Design 2/2-way
Actuation type externally controlled
Nominal diameter 8.0 mm
Pressure range 0.00 - 40.0 bar
KV value 1.7 m³/h
Housing material brass
Temperature medium -10 to +100°C
Connection G3/8
286-X
extremely compact
Design 2/2-way
Actuation type externally controlled
Nominal diameter 8.0 mm
Pressure range 0.00 - 40.0 bar
KV value 1.7 m³/h
Housing material brass, aluminium
Temperature medium -10 to +100°C
Connection G3/8
290
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 15.0 mm
Pressure range 0.00 - 20.0 bar
KV value 2.5 - 5.2 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -20 to +40°C
Connection G1/4, G3/8, G1/2, G3/4
370
Design 3/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 40.0 bar
KV value 2.0 - 43.0 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2, G2
371
Design 3/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range 0.00 - 64.0 bar
KV value 2.0 - 17.9 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2
380
Design 3/2-way
Actuation type externally controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 64.0 bar
KV value 2.5 - 43.0 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2, G2
​
381
Design 3/2-way
Actuation type externally controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 100.0 bar
KV value 2.5 - 43.0 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1,
390
Design 3/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 15.0 mm
Pressure range 0.00 - 20.0 bar
KV value 2.5 - 5.6 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -20 to +40°C
Connection G1/4, G3/8, G1/2, G3/4
Quality in every detail – the internal design
The sectional view highlights the premium components (1–9) of the valve. The clearly defined, linear flow path is the key to the exceptional durability and reliability of this design.
Frequently Asked Questions (FAQs)
What are the key advantages of coaxial valves over conventional valve designs?
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The unique design of coaxial valves allows for highly accurate regulation of fluid flow – even under demanding conditions involving high pressures and temperatures.
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Robust and reliable: Engineered from premium-grade materials, the valve delivers long-lasting performance and dependable operation – even in demanding industrial environments.
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Versatility: Coaxial valves are available in multiple configurations and can be configured to meet the specific requirements
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In which industries are coaxial valves most commonly used?​
Automotive industry: control of fuel and oil pressure.
Food and beverage industry: Dosing and control of liquids and gases.
Chemical industry: control of aggressive media.
Medical technology: Control of fluids in medical devices.
Aerospace industry: Precise hydraulic control.
Mechanical engineering: Control of compressed air and hydraulic oil.
Which filter configurations are available for coaxial valves?
The choice of filter depends on the type of media and the requirements. Possible options include:
Galvanized steel: For water, air and oils.
Nickel-plated steel: For water, air, oils and slightly corrosive media.
Brass: For similar applications as nickel-plated steel.
Stainless steel 1.4305: For aggressive media such as acids and alkalis.
Stainless steel 1.4571: For particularly aggressive media and high temperatures.
Aluminum: For air and slightly corrosive media.
What does the abbreviation “NC” stand for in the context of coaxial valves?
“NC” stands for “normally closed”, indicating that the valve remains closed in its default state. It opens only when actuated, allowing media to flow through.
Where are the coaxial valves manufactured?
Coaxial valves are engineered and manufactured in Germany under stringent quality controls to meet the highest industrial standards.
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