Flow control valves are widely used range in industries and as named they are applied in controlling of flow. This range is available in high pressure rating and through knob rotation we can control the flow of media as per required. On knob, we have label to indicate the flow and hence accuracy of flow can be achieved. Locking system is arranged to lock the valve so no auto tuning is occurred. As named this valves are manufactured without facility of inbuilt check valve. This causes free reverse pressure possibilities.