![]() The box next to the 'active' actuator always shows the currentįlow path(s) of the valve. Interactive Demo (Push button to actuate lever) 2 Position, Lever Actuated, Spring Return Valve ![]() These arrows represent the flow paths the valve has when it is in that position. Flow is indicated by the arrows inĮach box. The number of position and flow boxes that make up a valve symbol indicate the number of positions the valve has. Every valve has at least two positions ( learn more) and each position has one or more flow paths, thus every valve symbol has at least two Flow Boxes to describe those paths. The Position and Flow Boxes indicate how the valve functions. The Actuators are the mechanisms which cause the valve to shift from one Here is a brief breakdown of how to read a symbol:Įvery valve symbol has multiple parts (see figure below). ![]() ![]() Symbols show the methods of actuation, the number of positions, the flow paths and the number of ports. Symbols representing these valves provide a wealth of information about the valve they represent. Directional air control valves are the building blocks of pneumatic control. ![]()
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