Description
DN10 3/2 Way Air Pilot Coaxial Valve – RSG 38010
The RSG 38010 is a DN10 3/2 way externally controlled coaxial valve designed for reliable switching, diverting and exhausting of compatible liquids and gases at pressures from 0 to 64 Bar.
Available as normally closed or normally open, the valve uses a double-acting pneumatic piston with return spring, operated by a 3–8 Bar pilot supply. The externally controlled design allows operation from zero differential pressure, while the three-port configuration provides an additional R connection for diverting, venting or return flow.
The DN10 RSG 38010 has a manufacturer-rated Kv flow coefficient of 2.5 m³/h and standard 1/4", 3/8" or 1/2" BSP connections, with 3/4" BSP available as an optional configuration.
Valve Function & Operation
The RSG 38010 is a 3/2 way coaxial valve available in two switching configurations.
380A10 – Normally Closed
In the normal position, the main P → A flow path is closed and the alternative flow path is selected. Applying pilot pressure switches the valve to connect the main process flow.
380B10 – Normally Open
The main P → A flow path is open in the normal position and switches to the alternative flow path when the pneumatic actuator is operated.
DN10 Ports & Connections
Standard DN10 process connections:
✓ G1/4 BSP
✓ G3/8 BSP
✓ G1/2 BSP
Optional:
✓ G3/4 BSP
✓ Special Connections
The R connection can also be supplied in different orientations, allowing the third port to face forwards, upwards, backwards or downwards to simplify installation within machinery and pipework.
Pressure & Performance
Operating Pressure: 0 to 64 Bar
Reverse Pressure: Up to 16 Bar
Minimum Differential: 0 Bar
Pilot Pressure: 3 to 8 Bar
Nominal Diameter: DN10
Orifice: 10mm
Kv Flow Coefficient: 2.5 m³/h
The manufacturer specifies the following pressure capabilities:
P → A: Up to 64 Bar
A → P: Up to 16 Bar
P → R: Up to 64 Bar
R → P: Up to 16 Bar
The overall Series 380 design is backpressure leak-tight to a maximum of 16 Bar.
3/2 Way Coaxial Valve Design
Unlike a conventional 2/2 way shut-off valve, the RSG 38010 incorporates three process ports, allowing the valve to switch the process flow between two flow paths.
This makes the valve particularly useful where a system needs to pressurise and exhaust, supply and return, or divert a process medium using a single valve assembly.
The manufacturer's sectional drawing identifies the principal components as:
✓ 2/2 Way Adapter Fitting
✓ 2/2 Way Valve Seat
✓ Piston / Control Tube
✓ Actuating Plate
✓ 3/2 Way Valve Seat
✓ 3/2 Way Adapter Fitting
✓ Return Spring
✓ PTFE Rod Seals
The sectional construction and dual valve-seat arrangement are shown on page 2 of the manufacturer's specification.
Switching Performance
Opening / Closing Time: 50–1000ms
Actual switching time depends upon operating pressure, pilot pressure, selected pilot valve and any exhaust-air throttling fitted to the pneumatic control system.
The valve can be installed in any mounting position.
High Viscosity Fluids
The RSG 38010 is suitable for compatible fluids with viscosities up to 1000 cSt.
Typical media can include:
✓ Hydraulic Oils
✓ Lubricating Oils
✓ Process Oils
✓ Cooling Fluids
✓ Viscous Process Liquids
✓ Compatible Industrial Fluids
Actual suitability depends upon viscosity, operating temperature, pressure and compatibility with the selected wetted materials.
Construction & Materials
Standard Body: Brass
Optional Body Materials:
✓ AISI 303 Stainless Steel
✓ AISI 316 Stainless Steel
Internals: Stainless Steel 316L
The manufacturer confirms brass, AISI 303 and AISI 316 as available threaded-body materials for the RSG 380/381 family.
Standard Seal Construction
Standard sealing materials include:
Static Seals: FKM
Dynamic Seals: FKM / PTFE
Seat Seal: PTFE
Optional seal configurations include:
✓ NBR
✓ EPDM
Media Compatibility
The RSG 38010 can control liquids and gases compatible with its selected body and sealing materials.
Typical applications include:
✓ Hydraulic Oils
✓ Lubricating Oils
✓ Process Liquids
✓ Cooling Fluids
✓ Compatible Chemicals
✓ Compatible Gases
✓ Fluids Up To 500 cSt
For aggressive chemicals, specialist gases or unusual process fluids, compatibility should be confirmed against all wetted materials before ordering.
Water Service Seal Option
For water applications, the RSG 38010 can be configured with UHMW Polyethylene sealing.
The UHMW Polyethylene seal provides:
✓ Maximum Temperature +80°C
✓ High Wear Resistance
✓ Excellent Abrasion Resistance
✓ Low Friction
✓ Good Lubricity
✓ Debris-Stripping Seal Action
The sharp-edge dynamic sealing action can help remove limescale and small deposits from the sealing surface during operation, making this configuration particularly useful for demanding industrial water applications.
Gas Service Seal Option
For compatible gaseous media, the RSG 38010 can be configured with Fluoroloy® A21 sealing.
The Fluoroloy® A21 configuration provides:
✓ Maximum Temperature +80°C
✓ High Wear Resistance
✓ Low Friction
✓ Broad Chemical Compatibility
✓ Reliable Dynamic Sealing
The actual gas, pressure and operating temperature should be specified when ordering to ensure the appropriate sealing configuration is selected.
Vacuum & Clean Service
A dedicated vacuum version is available within the RSG 380 Series.
The manufacturer also provides an oil and grease-free configuration for clean process applications. Both are defined mechanical options within the Series 380 ordering system.
The externally controlled pneumatic design is particularly useful for vacuum applications because valve actuation does not depend upon the process pressure.
Temperature
Media Temperature: -10°C to +100°C
Ambient Temperature: -10°C to +50°C
These are the manufacturer's standard temperature limits for the RSG 380 Series.
Water and Fluoroloy® A21 specialist seal configurations are rated to a maximum of +80°C.
Pneumatic Pilot Specification
Actuation: External Pneumatic Pilot
Actuator: Double-Acting Piston
Return: Spring Return
Pilot Pressure: 3–8 Bar
DN10 Pilot Ports: G1/8
Interface: NAMUR
Mounting Position: Any Position
An upstream air preparation/service unit is recommended to help extend valve service life. The manufacturer specifically identifies the DN10 control connection as G1/8, while DN15–DN50 use G1/4.
NAMUR Pilot Valve Options
The NAMUR interface allows a suitable 5/2 way pilot solenoid valve to be mounted directly onto the pneumatic actuator.
Manufacturer accessory options include:
✓ NAMUR Pilot – Side Connections
✓ NAMUR Pilot – Top Connections
✓ M12 Solenoid Pilot
✓ 24V DC Pilot Valve
✓ 230V 50Hz Pilot Valve
Sintered bronze G1/8 and G1/4 exhaust silencers are also available.
ATEX Pilot Option
An explosion-protected electrical pilot option is available for hazardous-area applications.
Manufacturer marking:
II 2G Ex m II T4
II 3D IP65 T130°C
Important: the manufacturer states that operating pressure is reduced by approximately 20% when the Ex specification is used.
Optional Features & Accessories
Available options include:
✓ Normally Closed 380A10
✓ Normally Open 380B10
✓ Stainless Steel Body
✓ Mounting Brackets
✓ Position Indication
✓ Oil & Grease-Free Version
✓ Vacuum Version
✓ NAMUR Pilot Solenoid Valve
✓ Rotatable R Connection
✓ Exhaust Silencers
✓ Power Reduction Connector
✓ ATEX Pilot Option
✓ Modular Valve Systems
Position Indication
Optional open and/or closed position feedback can provide electrical confirmation of valve position for integration with PLCs, machinery controls and process-monitoring systems.
Inductive position switches with LED indication and 2 metre cable can be supplied according to the required configuration.
Typical Applications
✓ High-Pressure Fluid Control
✓ Supply & Exhaust Systems
✓ Pressure & Return Circuits
✓ Fluid Diverting Systems
✓ Hydraulic Systems
✓ Lubrication Systems
✓ Process Machinery
✓ Vacuum Systems
✓ Industrial Automation
✓ Process Skids
✓ OEM Equipment
✓ Compatible Gas Systems
Why Choose the RSG 380 Series?
The RSG 380 provides the functionality of a 3/2 way directional valve combined with the robust construction and flow characteristics of a coaxial process valve.
The DN10 RSG 38010 operates from zero differential pressure up to 64 Bar, provides a substantial Kv 2.5 m³/h flow coefficient and can withstand reverse pressure up to 16 Bar.
With NC or NO operation, brass or stainless steel construction, specialist water and gas seals, NAMUR pilot control and multiple feedback and installation options, the RSG 38010 provides a versatile solution for demanding three-port industrial fluid-control applications.
Available Versions
380A10 – Normally Closed
380B10 – Normally Open
Pressure: 0–64 Bar
Reverse Pressure: Up to 16 Bar
Kv: 2.5 m³/h
Standard Connections:
✓ 1/4" BSP
✓ 3/8" BSP
✓ 1/2" BSP
Optional:
✓ 3/4" BSP
RSG 380 Coaxial Valve Range
RSG 38010 – DN10 – Kv 2.5 m³/h
RSG 38015 – DN15 – Kv 6.6 m³/h
RSG 38020 – DN20 – Kv 10.0 m³/h
RSG 38025 – DN25 – Kv 12.2 m³/h
RSG 38032 – DN32 – Kv 17.9 m³/h
RSG 38040 – DN40 – Kv 41.5 m³/h
RSG 38050 – DN50 – Kv 43.0 m³/h
All standard RSG 380 sizes are manufacturer-rated from 0 to 64 Bar.
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