Description
1/4"–3/8" 300 Bar Coaxial Solenoid Valve – RSG 267
The RSG 267 is a compact 2/2 way direct-acting high-pressure coaxial solenoid valve designed for reliable control of compatible liquids and gases at pressures up to 300 Bar.
Available as normally closed or normally open, the valve operates from zero differential pressure and is available with seven nominal orifice sizes from 1mm to 6mm. This allows the pressure and flow capacity to be matched closely to the application, with the smaller PEEK-seated versions providing the highest pressure capability and larger PTFE-seated versions providing increased flow.
The RSG 267 is available with 1/4" or 3/8" BSP connections, a galvanised steel body as standard and optional nickel-plated steel construction.
Valve Function & Operation
The RSG 267 is a direct-acting 2/2 way coaxial solenoid valve available in two switching configurations.
267A – Normally Closed
The valve remains closed when electrically de-energised and opens when the solenoid is energised.
267B – Normally Open
The valve remains open when electrically de-energised and closes when the solenoid is energised.
Because the RSG 267 is direct acting, no minimum differential pressure is required for operation.
Ports & Connections
Standard process connections:
✓ G1/4 BSP
✓ G3/8 BSP
Optional connections:
✓ NPT Threads
✓ Special Connections
Pressure, Orifice & Flow
The maximum operating pressure, reverse-pressure capability and flow capacity depend upon the selected orifice and whether the valve is normally closed or normally open.
Normally Closed 267A
✓ 1mm – 300 Bar – 0.7 L/min
✓ 2mm – 300 Bar – 1.9 L/min
✓ 2.5mm – 300 Bar – 2.7 L/min
✓ 3mm – 270 Bar – 4.6 L/min
✓ 4mm – 135 Bar – 7.3 L/min
✓ 5mm – 90 Bar – 8.2 L/min
✓ 6mm – 60 Bar – 10.7 L/min
Normally Open 267B
✓ 1mm – 300 Bar – 0.7 L/min
✓ 2mm – 300 Bar – 1.9 L/min
✓ 2.5mm – 220 Bar – 2.7 L/min
✓ 3mm – 150 Bar – 4.6 L/min
✓ 4mm – 90 Bar – 7.3 L/min
✓ 5mm – 60 Bar – 8.2 L/min
✓ 6mm – 40 Bar – 10.7 L/min
Flow values are based on the manufacturer's stated flow data for each nominal orifice.
Reverse pressure A → P also varies according to the selected orifice and switching function, ranging from 1 Bar to 100 Bar. Where reverse pressure is present, please specify the required pressure when ordering so the correct configuration can be selected.
Direct-Acting Coaxial Design
The RSG 267 uses a direct-acting coaxial construction with the solenoid actuator and moving valve components arranged along the process flow axis.
This design provides reliable switching without relying upon process pressure to operate the valve and makes the RSG 267 particularly suitable for high-pressure applications where conventional pressure-assisted solenoid valves may not be appropriate.
Key operating advantages include:
✓ Zero Differential Operation
✓ Up To 300 Bar Pressure
✓ Direct Solenoid Actuation
✓ Compact Construction
✓ Fast Switching
✓ High Cycling Capability
✓ Any Mounting Position
High Viscosity Fluids
The RSG 267 is suitable for compatible fluids with viscosities up to 500 cSt.
Typical media can include hydraulic oils, lubricating oils, process oils and other viscous industrial fluids compatible with the selected sealing and body materials.
Actual suitability depends upon fluid viscosity, operating temperature, pressure and material compatibility.
Construction & Seals
Standard Body: Galvanised Steel
Optional Body: Nickel-Plated Steel
Static Seal: FKM
Seat Seal: PEEK or PTFE
The sealing material is determined by the selected orifice and pressure range.
PEEK Seat
✓ 1mm Orifice
✓ 2mm Orifice
✓ 2.5mm Orifice
✓ 3mm Orifice
PEEK is used for the smaller, higher-pressure configurations.
PTFE Seat
✓ 4mm Orifice
✓ 5mm Orifice
✓ 6mm Orifice
PTFE is used with the larger flow paths where the maximum operating pressure is lower.
Media Compatibility
The RSG 267 is suitable for liquids and gases compatible with its materials of construction.
Typical media include:
✓ Air
✓ Water
✓ Hydraulic Oils
✓ Lubricating Oils
✓ Process Liquids
✓ Compatible Chemicals
✓ Compatible Gases
✓ Fluids Up To 500 cSt
For aggressive chemicals, specialist gases or unusual process fluids, compatibility should be confirmed against the valve's wetted materials before ordering.
Temperature
Media Temperature: -10°C to +100°C
Ambient Temperature: -10°C to +50°C
The appropriate pressure, sealing material and media compatibility should be considered together when selecting the valve.
Switching Performance
Opening Time: Approx. 30ms
Closing Time: Approx. 200ms
The direct-acting coaxial construction provides fast electrical switching for automated high-pressure fluid-control applications.
Coil & Electrical Specification
Electrical Connection: DIN Form A
Standard: DIN EN 175301-803
DC Power: 58 Watts
AC Power: 55 Watts
Duty Cycle: 100% ED
Protection: IP65 with connector fitted
Voltage Tolerance: ±10%
Mounting Position: Any Position
AC versions use an integrated rectifier.
Voltage Options
Available voltage configurations include:
✓ 12V DC
✓ 24V DC
✓ 24V AC
✓ 110V AC
✓ 230V AC
✓ Special Voltages On Request
Energy Saving Power Reduction Option
The 24V DC RSG 267 can be fitted with an optional DIN Form A power-reduction connector.
The connector provides full electrical power during initial valve actuation before reducing the holding power once the valve has switched.
Benefits include:
✓ Reduced Holding Power
✓ Lower Energy Consumption
✓ Reduced Heat Generation
✓ Improved Thermal Stability
✓ Lower Coil Temperature
Optional Features & Accessories
Available options include:
✓ Normally Closed or Open
✓ Nickel-Plated Steel Body
✓ Mounting Brackets
✓ Open Position Feedback
✓ Closed Position Feedback
✓ Volt-Free Position Feedback
✓ LED DIN Connector
✓ Power Reduction Connector
✓ Special Voltages
✓ Special Connections
Position Indication
Optional position feedback switches can provide electrical confirmation of the valve's open and/or closed position.
These can be connected to PLCs, machinery controls, alarms and process monitoring systems where positive confirmation of valve position is required.
Typical Applications
✓ High-Pressure Hydraulics
✓ 300 Bar Fluid Control
✓ Hydraulic Test Equipment
✓ Pressure Test Rigs
✓ High-Pressure Lubrication
✓ Water Pressure Systems
✓ Machine Tools
✓ Process Machinery
✓ Industrial Automation
✓ Process Skids
✓ OEM Equipment
✓ High-Pressure Gas Systems
Why Choose the RSG 267?
The RSG 267 provides a compact solution where direct-acting electrical control is required at pressures up to 300 Bar.
Seven orifice sizes from 1mm to 6mm allow the valve to be selected according to the required pressure and flow, while separate normally closed and normally open configurations provide flexibility for different failsafe requirements.
With galvanised or nickel-plated steel construction, PEEK or PTFE seat technology, 100% duty operation and optional position feedback, the RSG 267 is particularly suited to demanding high-pressure industrial and OEM applications.
Available Versions
267A – Normally Closed
267B – Normally Open
Orifice Range: 1mm to 6mm
Connection: 1/4" or 3/8" BSP
Optional: NPT Thread
Pressure: Up to 300 Bar
Flow: 0.7 to 10.7 L/min
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