Technical Specifications Category Specification Model Type 98H49 Type Piston-Operated, Pilot-Based Pressure Reducing Regulator Service Natural Gas, Air, Inert Gases, Steam Pilot Type Internal, Self-Actuated (Type 49, defined by the suffix). Body Size & Orifice High Capacity ("H" designation). End Connections Flanged (ANSI Class 150, 300, or higher). Outlet Pressure Range Defined by the "49" pilot. This pilot is calibrated for a specific, field-adjustable range. The exact range must be confirmed from the factory data sheet. Maximum Inlet Pressure Suitable for very high pressures, often up to 400 psig or more, depending on the body class. Droop Performance Excellent (low droop) due to the pilot-operated design. Body Materials Carbon Steel (WCB) standard; other alloys available. Piston Ring Material Glass-Filled Teflon or similar for low friction and long life.
