Description
Pneumatic Shuttle Valve & Double Pressure Valve – ST / STH Series
Compact aluminium pneumatic shuttle valves and double pressure valves designed for compressed air systems requiring automatic pressure selection, signal logic functions, and reliable pneumatic control.
Ideal for pneumatic automation, machine control systems, safety circuits, and dual air supply applications.
Valve Function & Operation
ST Shuttle Valve
The ST shuttle valve automatically selects the higher of two pneumatic input pressures and routes it to a common outlet. Commonly used where a machine can be operated from two separate control signals or air sources.
STH Double Pressure Valve
The STH double pressure valve performs an AND logic function, requiring pressure at both X and Y inputs before producing an output signal. Ideal for two-hand safety controls and pneumatic interlock systems.
Technical Specification
✓ Function: Shuttle Valve (ST) or Double Pressure Valve (STH)
✓ Port Sizes:
1/8" BSP
1/4" BSP
Optional NPT or Rc threads
✓ Operating Pressure:
0.8 to 10 Bar
Tested to 10 Bar
✓ Temperature Range:
-10°C to +80°C
✓ Media:
Filtered compressed air
✓ Body Material:
Aluminium alloy
Internal Flow Area
Model Port Size Flow Area Equivalent Diameter
ST-01 1/8" 7.5 mm² Ø3.1 mm
STH-01 1/8" 14 mm² Ø4.2 mm
ST-02 1/4" 21 mm² Ø5.2 mm
Typical Applications
✓ Dual air supply selection
✓ Pneumatic logic circuits
✓ Machine safety systems
✓ Two-hand control circuits
✓ Pneumatic automation panels
✓ Process control equipment
✓ Air-operated machinery
✓ Manifold-mounted pneumatic assemblies
Key Benefits
✓ Automatic pressure source selection
✓ Compact space-saving design
✓ Low maintenance operation
✓ Reliable pneumatic logic control
✓ Robust aluminium construction
✓ Suitable for industrial automation systems
✓ Over 50 years of proven pneumatic valve manufacturing experience
Available Models
ST-01 Shuttle Valve – 1/8" BSP
ST-02 Shuttle Valve – 1/4" BSP
STH-01 Double Pressure Valve – 1/8" BSP
Free next-day UK delivery available on stock items.
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