symbols (pneumatic)

• single acting cylinder

  
• double acting cylinder

  
• 2 port/2 position. Directional control valve   (2/2 DCV)

  
• 3 port / 2 position directional control valve (3/2 DCV)

  
• 4 port 2 position directional control valve (4/2 DCV)

  
• 5/2 DCV

  
• 4/3 DCV

  
• Pneumatic air suplly

  
• Hydraulic air supply

  
• operating line

  
• pilot line

  
• exhaust

  
• check valve / non-return vavle

  
• Check valve (spring return)

  
• Pilot operated check valve

  
• Pilot operated check valve with spring return

  
• choke

  
• variable choke

  
• Variable one way flow control valve

  
• Shuttle valve  (OR element)

  
• Shuttle valve (AND element)

  
• manual control

  
• manual push button control

  
• manual level control

  
• Manual control with 2 position detented lever

  
• Manual pedal operated control

  
• Mechanical control with roller lever(cam operated)

  
• Mechanical control with pilot assisted roller lever

  
• penumatic control

  
• spring

  
• pressure gauge

  
• pressure indicator

  
• Air dryer

  
• Actuator / reciever

  
• cooler

  
• Tank

  
• Filter

  
• Lubricator

  
• Drain

  
• Automatic drain