The RB 1700 & RB 1800 series feature 3/4, 1 (RB 1700) and 1 1/2 (RB 1800) sizes. The 3/4 size is specially designed for high pressure reducing applications, such as LPG first stage pressure reduction, while the 1 and 1 1/2 sizes are appropriate for Commercial & Industrial applications such as burner and large appliance regulation, where fast response is required. Their balanced valve design provides constant outlet pressure under all inlet pressure conditions.

DRESSER-UTILITY-SOLUTIONS-RB-1700-1800-SERIES-REGULATOR [PDF]