DIN ISO1219-1, 03/96. Graphic symbols for pneumatic equipment.
Circuit symbols are used through this catalogue and on the labels of most
SMC Pneumatic products.
There are several symbol systems and conventions in use around the world, most officially recognised by standards bodies. Commonly used is
ISO1219-1.
The symbols found in this catalogue generally conform to the Japanese
Industrial Standard (JIS) in many cases, there is no difference between
The situation also occurs when SMC develop new product systems for which an ISO or JIS symbol does not exit. Examples include the MGZ high power cylinder or the AV series air operated soft start / release valve. In this situation either a composite symbol showing a representative circuit is used, or the nearest standard symbol is modified by SMC.
For assistance a table below shows both ISO symbols, which may differ from JIS symbols in this catalogue, and common ISO/JIS/SMC Symbols.
JIS and ISO circuit symbols.
Volume 1
Symbol
Description
Symbol
Description
Directional control valve
2/2-way valve, closed normal position
Directional control valve
5/3-way valve, exhaust neutral position
Directional control valve
2/2-way valve, open normal position
Directional control valve
5/3-way valve, open neutral position
Directional control valve
3/2-way valve, open normal position
Directional control valve
3/3-way valve, closed neutral position
Directional control valve
4/2-way valve
Directional control valve
4/3-way valve, closed neutral position
Directional control valve
4/3-way valve, exhaust neutral position
Directional control valve
5/2-way valve
Directional control valve
5/3-way valve, closed neutral position
12
Manual Control
General
Manual Control
Button
Manual Control
Lever
Manual Control
Pedal
Mechanical
Control
Plunger
Mechanical
Control
Spring
Mechanical
Control
Roller