hydarulics

• Single acting cylinder


  Converts fluid pressure into linear mechanical movement (Spring action on return)
• Double acting cylinder


  Fluid pressure will act on forward and return stroke
• 2 port/2 position. Directional control valve (2/2 DCV)


  • To open and close flow
• 3 port / 2 position directional control valve (3/2 DCV)


  • Various uses
• Single Acting Cylinder


  • Pressure
  • Atmosphere
• Double Acting Cylinder


  • Pressure
  • Atmosphere
• 2/2 Way Plunger Actuated Poppet Valve


  • Force
  • Flow
  • Flow
• 3/2 Way, Plunger Actuated, Spring Reset, Spool Valve


  • 2 (A)
  • 1 (P)
  • 3 (R)
  • Flow
  • Flow
  • Flow
  • Force
• 4 port 2 position directional control valve (4/2 DCV)


  • Directs fluid to and from components
• 5/2 DCV


  • Can be used as either 3/2 or 4/2 DCV
• 4/3 DCV


  • Directs air/oil to the cylinder (allows cylinder to be locked)
• Operating line


  Line for transmission of fluid to allow useful work
• Pilot line


  Line for transmission of fluid to allow activation of DCVs etc
• Exhaust


  Allows compressed air to escape from circuit
• Check valve / non return valve


  • Allows flow in one direction only
• Check Valve (Non-Return Valve)


  • Free Flow
  • Checked Flow
• Choke


  Restricts flow
• Variable choke


  Varies the restriction of flow
• Pilot Operated Check Valve


  • Variable one way flow control valve
  • Controls flow in one direction only
• Shuttle valve (OR element)

  • Allows one output from either of two inputs
• Shuttle valve (AND element)


  • Allows one output from both inputs together
• Shuttle Valve (OR Gate)


  • Flow
  • Pressure
  • Pressure
• Two Pressure Valve (AND Gate)


  • Pressure
  • Pressure
  • Flow
• Pneumatic control


  Pilot air to operate component
• Pressure gauge


  Gives indication of pressure in the system
• Air dryer


  • Removes moisture from air by passing it through moisture absorbent crystals
• Accumulator/ Receiver


  • Stores hydraulic pressure/
  • Stores Pneumatic Pressure
• Cooler


  Cools fluid
• Tank


  Allows hydraulic fluid to escape from system
• Filter


  Cleans fluid of contaminants
• Lubricator


  Allows oil into air flow
• Drain


  Allows water to escape from compressed air circuits
• Venturi


  • Normal Flow
  • Increased Flow
  • Normal Flow
• Automatic Drain


  • Allows water to escape when a set level is reached
• Conditioning unit


  • Contains filter, pressure regulator and lubricator in one unit
• Conditioning unit


  • Combined filter , moisture separator , pressure control valve and pressure gauge
• Compressor


  Compresses air
• Pump


  Generates flow of hydraulic fluid
• Sequence valve


  Used to operate actuators and valves in a circuit in a particular sequence dependent on pressure
• Variable Pressure relief valve


  Allows fluid to vent/escape if pressure is excessive