CNG Reducer/CNG Pressure Reducer/ CNG Reducer 1> manufacturer of 30 years 2> for open loop(single point system) 3> good price CNG Reducer/CNG Pressure Reducer/ CNG Reducer1> manufacturer of 30 years2> for open loop(single point system)3> good price Have the high pressure natural gas, through 3 times of pressure reduction, proportionally output fuel upon the negative pressure reduction, ...