Basic symbols
Rectangle Usually valves
Restriction depending Restriction depending on the viscosity
Restriction independing Restriction independing on the viscosity
Spring Spring
Square Usually valves
Square on a corner Conditional unit
Square. Usually valves
Square.. Usually valves
Square... Usually valves
Control mechanisms
Electrical 1 winding Electrical control with one winding
Electrical 2 windings Electrical control with two windings, two directions
Electrical 2 windings. Electrical control with two windings, two dir, variable
Electrical with motor Electrical control with motor
Increase hydraulic Direct control by increase of pressure - hydraulic
Increase pneumatic Direct control by increase of pressure pneumatic
Manual Muscular control - general symbol
Manual - lever Muscular control - lever
Manual - pedal Muscular control - pedal
Manual - push button Muscular control - push button
Mechanical - plung/roller Mechanical control - plunger and roller
Mechanical - plunger Mechanical control - plunger
Mechanical - roller Mechanical control - roller
Mechanical - spring Mechanical control - spring
Pressure Direct control by pressure
Release pneumatic Direct control by release of pressure - pneumatic
Control Valves
Free Non-return - free
Loaded Non-return - loaded
Quick-exhaust Quick-exhaust valve
Shuttle Shuttle valve
Cylinders
Breake Cylinder with breake in one end
Breake. Cylinder with breakes in both ends
Breake.. Cylinder with variable breake in one end
Breake... Cylinder with variable breaks in both ends
Differential Differential cylinder
Double - double piston Double-acting cylinder - double-ended piston
Double - single piston Double-acting cylinder - single-ended piston
Single - return Single-acting cylinder with unspecified return
Single - spring return Single-acting cylinder with spring return
Directional control V
2/2 hydraulic/pneumatic 2/2 hydraulic or pneumatic control valve
2/2 manual 2/2 manual control valve
3/2 hydraulic/pneumatic 3/2 hydraulic or pneumatic control valve
4/2 elektromagnetic 4/2 control valve w. elektromagnetic pilot valve
5/2 pressure 5/2 control valve with pressure control in both directions
Directional One direction
Directional. One closed direction
Directional.. Two directions
Directional... Two directions
Directional..... Two directions and one closed connection
Directional...... Two directions with link
Directional....... One direction and two closed connections
Energy units
Hydraulic Hydraulic source
Pneumatic Pneumatic source
Pressure General symbol
Filters/seperators
Air dryer Air dryer
Filter Filter
Lubricator Lubricator
Seperator Seperator - manually drained
Seperator. Seperator - automatically drained
Seperator.. Filter with seperator - manually drained
Seperator... Filter with seperator - automatically drained
Flow Valves
Flow control Flow-control valve with constant flow
Flow control. Flow-control valve with constant flow, con. to tank
Flow control.. Flow-control valve with adjustable flow
Gate Gate-valve
Restrictor Restrictor valve - simplified symbol
Restrictor. Restrictor valve - manual adjusted
Restrictor.. Restrictor V. - mechanical control by roller, spring-loaded
Functional elements
Hydraulic flow Hydraulic flow
Pneumatic flow Pneumatic flow
Sloping Facility for variability or adjustability
Heat exchangers
Controller Temperature controller
Cooler Cooler
Heater Heater
Measuring instruments
Flow 1219 Flow meter ISO 1219
Flow 3511 Flow meter ISO 3511
Integrating 1219 Integrating flow meter ISO 1219
Integrating 3511 Integrating flow meterr ISO 3511
Manometre 3511 Manometre ISO 3511
Pressure 1219 Pressure gauge ISO 1219
Pressure 3511 Pressure gauge ISO 3511
Temperature 3511 Temperature ISO 3511
Thermometer 1219 Thermometer ISO 1219
Thermometer 3511 Thermometer ISO 3511
Motors
Constant, 1 direction Constant hydraulic motor with one direction of flow
Constant, 2 directions Constant hydraulic motor with two directions of flow
Oscillating hydraulic Oscillating hydraulic motor
Oscillating pneumatic Oscillating pneumatic motor
Pneumatic, 1 direction Pneumatic motor with one direction of flow
Pneumatic, 2 directions Pneumatic motor with two directions of flow
Variable, 1 direction Hydraulic variable motor with one direction of flow
Variable, 2 directions Hydraulic variable motor with two directions of flow
Pressure transformers
Intensifier Pneumatic intensifier
Intensifier. Pneumatic/hydraulic intensifier
Pressure Valves
Basic Valve normally closed in unactivated position
Basic. Valve normally open in unactivated position
Basic.. 2 in and 1 out.Valve normally closed in unactivated position
Differential Differential pressure valve
Pressure control Pressure control valve without relief
Pressure control. Remote pressure control valve without relief
Pressure reducing Pressure reducing valve
Sequence Sequence valve
Pump-motors
Constant Pump-motor w. 1 direction for pump and reverse for motor
Constant. Pump-motor w. 1 direction for pump and motor
Constant.. Pump-motor w. 2 directions for pump and motor
Variabel Pump-motor w. 1 direction for pump and reverse for motor
Variabel. Pump-motor w. 1 direction for pump and motor
Variabel.. Pump-motor w. 2 directions for pump and motor
Pumps
Compressor Airpump with constant displace
Constant, 1 direction Constant hydraulic pump with one direction of flow
Constant, 2 directions Constant hydraulic pump with two directions of flow
Variable, 1 direction Variable hydraulic pump with one direction of flow
Variable, 2 directions Variable hydraulic pump with two directions of flow
Reservoirs
Accumulator Accumulator
Pressure-tank Pressure-tank
Tank Tank with connection to the atmosphere
Version
Hydraulic & Pneumatic ISO 1219 Version 1.00.00. Date: 28.05.2001