2/2 Valve; 2 Ports, 2 Positions | 
3/2 Valve; 3 Ports, 2 Positions | 
4/2 Valve; 4 Ports, 2 Positions |  4/3 Valve; 4 Ports, 3 Positions |  5/2 Valve; 5 Ports, 2 Positions |
5/3 Valve; 5 Ports, 3 Positions | 
Accumulator | 
Air Dryer | 
Air Motor (One Directional Flow) | 
Air Motor (Two Directional Flows) |
Check Valve (Spring Loaded) | 
Compressor | 
Cylinder -----(Spring Return) | 
Cylinder Double Acting
(Double Rod) | 
Cylinder Double Acting
(Single Fixed Cushion) |
Cylinder Double Acting
(Two Adjustable Cushions) | 
Differential Pressure | 
Direction of Flow | 
Exhaust Line or Control Line | 
Filters and Regulators |
Filter (Automatic Drain) | 
Filter (Manual Drain) | 
Fixed Restriction | 
Flexible Line | 
Flow Control Valve |
Flow Gauge | 
Lever | 
Lines Connected | 
Lines Crossing | 
Lubricator |
Muscular Control | 
One Bypass Flow Path and
Two Closed Ports | 
One Flow Path | 
Pedal or Treadle | 
Pilot Pressure (External) |
Pilot Pressure (Internal) | 
Plugged Port | 
Plunger or Position Indicator Pin | 
Pneumatic | 
Pressure Actuated Electric Switch |
Pressure Gauge | 
Pressure Regulator
(Adjustable, Non-Relieving) | 
Pressure Regulator
(Adjustable, Self-Relieving) | 
Pushbutton | 
Quick Acting Coupling |
Roller | 
Roller (One-Way) | 
Shuttle Valve | 
Silencer | 
Single Square |
Solenoid and Pilot;
Manual Override and Pilot | 
Solenoid (Single Winding) |
Solenoid (Single Winding) | 
Spring | 
Two Closed Ports |
Two Distinct Positions and
One Transitory (Center) Position | 
Two Flow Paths | 
Two Flow Paths and One Closed Port | 
Two Flow Paths with Cross Connection | 
Vacuum Pump |
Variable Restriction | 
Working Line | Connexion Leading the way Forward | Connexion Solenoid Valve symbols from the UK's premier solenoid valve suppliers | |
