The Watson McDaniel 403 direct operated steam pressure regulating valves are pilot-operated, piston-actuated, pressure regulators used for reducing steam pressure. These regulators are equipped with an internal sensing line which simplifies installation. The 403 Series has all stainless steel internals for high-pressure applications up to 450 PSIG. Double Spring Option is available for wider range of reduced pressures.

Available in control pressure ranges from 0 PSIG to 200 PSIG pressure reducing needs.
Maximum inlet pressure of 450 PSIG steam, 250 PSIG maximum differential steam pressure. Minimum inlet pressure of 20 PSIG steam, 10 PSIG minimum differential steam pressure.
Ductile iron construction with stainless steel seat & disc
Watson McDaniel PA Pressure Reducing Air Pilot Operator Submittal
Watson McDaniel PA Pressure Reducing Air Pilot Operator IOM