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