Description
DN10 2/2 Way Coaxial Air Pilot Valve – RSG 28010
The RSG 28010 is a compact DN10 2/2 way externally controlled coaxial air pilot valve designed for reliable shut-off and control of liquids, gases and compatible industrial process media from 0 to 64 Bar.
Unlike pressure-assisted process valves, the RSG 28010 uses an external pneumatic pilot supply to actuate the valve, allowing the main process line to operate from zero differential pressure. The actuator uses a double-acting piston with return spring and requires a 3–8 Bar pilot air supply.
The DN10 version provides a Kv flow coefficient of 2.7 m³/h and is available with standard 1/4", 3/8" and 1/2" BSP connections, with an optional 3/4" BSP connection available.
Valve Function & Operation
The RSG 28010 is an externally controlled 2/2 way coaxial valve available in either normally closed or normally open configurations.
280A10 – Normally Closed
The valve remains closed in its normal unactuated position and opens when the pneumatic pilot actuator is operated.
280B10 – Normally Open
The alternative normally open configuration provides the opposite fail-state for applications requiring the process line to remain open until the valve is pneumatically actuated.
Both configurations use a direct coaxial process-valve design combined with an external pneumatic actuator.
DN10 Ports & Connections
The standard DN10 RSG 28010 is available with:
✓ G1/4 BSP
✓ G3/8 BSP
✓ G1/2 BSP
Optional connections include:
✓ G3/4 BSP
✓ NPT Threads
✓ Flanged Connections
✓ Special Connections
The standard manufacturer configuration covers G1/4, G3/8 and G1/2 for DN10.
Pressure & Performance
Operating Pressure: 0 to 64 Bar
Reverse Pressure: Up to 16 Bar
Pilot Pressure: 3 to 8 Bar
Nominal Diameter: DN10
Orifice: 10mm
Kv Flow Coefficient: 2.7 m³/h
Weight – Brass Version: 1.6kg
Flow direction:
P → A: Up to 64 Bar
A → P: Up to 16 Bar
The RSG 280 Series is rated from 0–64 Bar across DN10 to DN50, with the manufacturer specifying reverse-pressure leak-tightness up to 16 Bar.
Flow Capacity
The DN10 RSG 28010 provides a Kv flow coefficient of 2.7 m³/h.
This provides substantial flow capacity through a compact DN10 valve while retaining operation from zero process pressure up to 64 Bar.
Externally Controlled Coaxial Design
The RSG 280 Series combines a coaxial process-valve construction with an externally controlled pneumatic actuator.
The actuator consists of a double-acting piston with return spring, operated by a 3–8 Bar pilot supply. The actuator incorporates G1/4 control connections and a NAMUR interface.
This arrangement is particularly useful for:
✓ High-Pressure Applications
✓ Frequent Switching
✓ Industrial Process Control
✓ High Viscosity Fluids
✓ Oils & Lubricants
✓ Industrial Gases
✓ Vacuum Systems
✓ Automated Process Equipment
Switching Performance
Opening and closing times are approximately 50–1000 milliseconds, depending upon pilot pressure, pilot valve selection and optional exhaust-air throttles.
This allows switching characteristics to be adapted to the application rather than relying upon a fixed switching speed.
High Viscosity Fluids
The RSG 28010 is suitable for compatible thick and glutinous fluids with viscosities up to 1000 cSt.
Typical applications can include:
✓ Thick Oils
✓ Hydraulic Oils
✓ Lubricating Oils
✓ Viscous Process Fluids
✓ Glutinous Industrial Liquids
Media compatibility should always be confirmed against the selected body and sealing materials.
Construction & Materials
Body materials are available in:
✓ Brass
✓ AISI 303 Stainless Steel
✓ AISI 316 Stainless Steel
The manufacturer also offers galvanised or nickel-plated steel body construction for applicable flanged configurations.
Internal Components: Stainless Steel
The coaxial construction incorporates a piston/control tube, actuating plate, guiding discs, spring and PTFE rod seals.
Standard Seal Construction
Standard sealing materials include:
✓ FKM Static Seals
✓ FKM & PTFE Dynamic Seals
✓ PTFE Seat Seal
Optional seal configurations include:
✓ NBR
✓ EPDM
The manufacturer type code confirms FKM as standard, with NBR and EPDM alternatives available.
Media Compatibility
Typical applications include:
✓ Water
✓ Hydraulic Oils
✓ Lubricating Oils
✓ Thick Process Fluids
✓ Compressed Air
✓ Industrial Gases
✓ Process Liquids
✓ Cooling Fluids
✓ Compatible Chemicals
✓ Viscous Fluids Up To 1000 cSt
For aggressive chemicals or unusual process fluids, compatibility should be confirmed against all wetted materials before ordering.
Special Service Options
The RSG 280 Series can be configured for specialist media and process requirements in addition to standard industrial fluid applications.
Available configurations include:
✓ Water Service Seal Options
✓ Gas Service Seal Options
✓ Vacuum Service Option
✓ Oil & Grease-Free Construction
✓ Special Connections
Different body materials and sealing arrangements can be selected according to the application and required media compatibility.
Water Service Seal Option
For demanding water applications, UHMW Polyethylene seals are available with a maximum service temperature of +80°C.
UHMW Polyethylene provides excellent wear and abrasion resistance together with very good lubricity in water-based media.
The special sharp-edged shape of the dynamic seal creates a stripping action against the piston/plunger, helping remove limescale and debris during operation.
This makes the configuration particularly useful where deposits or contamination could affect conventional sealing arrangements.
Gas Service Seal Option
For demanding gaseous applications, Fluoroloy® A21 seals are available with a maximum service temperature of +80°C.
Fluoroloy A21 provides excellent wear resistance, low friction and broad chemical compatibility, together with high sealing performance for appropriately specified gaseous media.
Vacuum Service
A dedicated vacuum configuration is available for the RSG 280 Series.
Because actuation is supplied independently by the pneumatic pilot circuit, the valve does not rely upon process pressure for operation, making it particularly useful for vacuum and zero-pressure applications.
Temperature
Media Temperature: -10°C to +100°C
Ambient Temperature: -10°C to +50°C
Water Seal Option: Up to +80°C
Gas Seal Option: Up to +80°C
Pneumatic Pilot Specification
Actuation: External Pneumatic Pilot
Actuator: Double-Acting Piston
Return: Spring Return
Pilot Pressure: 3–8 Bar
Pilot Connections: G1/4
Interface: NAMUR
Mounting Position: Any Position
An upstream air preparation/service unit is recommended to help extend valve service life.
NAMUR Pilot Valve Option
Optional 5/2 way NAMUR pilot solenoid valves can be mounted directly to the actuator, providing electrical control of the pneumatic pilot system.
Available pilot solenoid voltages include:
✓ 24VDC
✓ 230VAC 50Hz
Pilot valves are available with lateral or top-facing connections.
Optional Features & Accessories
The RSG 280 Series can be configured with:
✓ Mounting Brackets
✓ Exhaust Air Throttles
✓ Sintered Bronze Silencers
✓ NAMUR Pilot Solenoid Valves
✓ Open Position Indication
✓ Closed Position Indication
✓ M12 Position Sensors
✓ ATEX Position Sensors
✓ Vacuum Configuration
✓ Oil & Grease-Free Construction
✓ Special Connections
✓ Flanged Connections
The manufacturer also provides magnetic field position sensors, including an M12 version and an intrinsically safe ATEX sensor option.
Position Indication
Optional magnetic or inductive position sensors can provide electrical confirmation of valve position for connection to PLC, process-control and automation systems.
Open and/or closed position indication can therefore be incorporated into machinery requiring confirmation that the process valve has completed its commanded movement.
Pilot Exhaust Control
Optional G1/8 or G1/4 exhaust-air throttles can be fitted to control actuator exhaust flow and therefore influence valve switching speed.
Sintered bronze silencers are also available for G1/8 and G1/4 exhaust connections.
Typical Applications
✓ High-Pressure Fluid Control
✓ Hydraulic Systems
✓ Industrial Gas Systems
✓ Compressed Air Systems
✓ Vacuum Systems
✓ Lubrication Systems
✓ Thick & Glutinous Fluids
✓ Viscous Process Fluids
✓ Chemical Processing Equipment
✓ Pressure Testing Equipment
✓ Test Rigs & Process Skids
✓ Industrial Automation
✓ OEM Machinery
✓ Automated Process Systems
✓ Modular Manifold Systems
Why Choose an Air Pilot Coaxial Valve?
An air pilot coaxial valve combines the robust flow path and compact construction of a coaxial valve with an independent pneumatic actuator.
Because switching force comes from the 3–8 Bar external pilot supply, valve operation is independent of the process pressure. This makes the RSG 28010 particularly useful for applications involving zero differential pressure, vacuum, high viscosity fluids and high-pressure media.
The RSG 28010 provides this capability from 0 to 64 Bar with a compact DN10 flow path and Kv 2.7 m³/h capacity.
Available Versions
280A10 – Normally Closed
280B10 – Normally Open
Standard DN10 connections:
✓ 1/4" BSP
✓ 3/8" BSP
✓ 1/2" BSP
Optional:
✓ 3/4" BSP
✓ NPT
✓ Flanged Connections
RSG Air Pilot Coaxial Valve Ranges
RSG 280 Series – DN10-DN50 up to 64 Bar
RSG 281 Series – Up to 120 Bar
RSG 282 Series – Up to 160 Bar
The 281 Series reaches 120 Bar on DN10-DN25, while the 282 Series reaches 160 Bar on DN10-DN25.
Related Products & Categories
RSG 282 series 160 Bar
Coaxial Solenoid Valves
Air Actuated Valves
Namur Mount Solenoid Valves
2, 3 & 5 Way Air Control Valves
Airline Fittings & Tubing
