Pneumatic Symbols

Common Symbology in Pneumatics

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

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