Control valve is controlled actuator system, its quality is directly applied on the quality of the reaction system is adjusted. As the final element in the process control, the importance in it than in the past with updated knowledge. The quality of Propane Control Valve applications, in addition to the quality of the product itself, the user is correct installation, use, maintenance, accurately calculated, the selection is very important. Selection of calculation errors, causing the system to open the stop, and some can not even put into use, so for users and system designers should be aware of the importance in the field of valve, control valve selection must be taken seriously enough.