Servo pneumatic control systems are able to generate a big forces and high speeds with a high accuracy. Thanks to proportional valves we are able to control the accuracy and speeds of motions in servo pneumatic circuits. Depending on the goal, almost we use the linear cylinders. And we achieved a simulation of servo pneumatic system using a single and double solenoid proportional valve for inducting and control. And we confirmed here, that we can choose servo pneumatic components, sizes and specifications by working on the model translated into linear, then checking the effects of this model comparing with the complete nonlinear system. This will help in choosing the components of servo pneumatic systems more easily and helping the designer to achieve more complicated actual systems with more durability and less cost and efforts to achieve the needed results.