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 | 
Filter (no Drain) | 
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) | 
Pressure Regulator
(Remote Pilot Operated) | 
Pushbutton |
Quick Acting Coupling | 
Roller | 
Roller (One-Way) |
Shuttle Valve | 
Silencer | 
Single Square |
Solenoid and Pilot;
Manual Override and Pilot | 
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 | |
