Pneumatic Control Valves (Solenoid Valves) are well known for their utilization of electromagnetic force based operation. As part of their mechanism, a magnetic field is produced when electrical current passes through their solenoid coil. Generated magnetic field promotes movement of ferrous metal rod. It is used for effective controlling of pneumatic circuit by using electric input. Quick to fix, these valves have long working life. Standard of these solenoid valves has been checked on the basis of their performance, longevity and operating cost.