Series 127SS Process Steam Pressure Regulators are used in commercial, industrial, and institutional applications to regulate steam pressure in the main line and large capacity process services. They feature a bronze body with NPT threaded inlet and outlet connections, single seat, and diaphragm. Sizes 1 1/2 to 3 in. have stainless steel disc. Series 127SS is designed for initial pressures up to 250psi (17.5 bar).