The zigzag indicates a spring is in use. The parenthesis represent flow restriction. These basic symbols make up the majority of the symbols in a hydraulic or pneumatic schematic. You can place ...
Basic Pneumatic Schematics and Circuit Design provides an overview of different common pneumatic schematic symbols, including air treatment symbols; pressure, flow, and direction valve symbols; and ...
"Basic Pneumatic Schematics and Circuit Design" provides an overview of different common pneumatic schematic symbols, including air treatment symbols; pressure, flow, and direction valve symbols; and ...