Technical Specifications Category Specification Model Type 99L Type Piston-Operated, Pilot-Based Pressure Reducing Regulator Service Natural Gas, Air, Inert Gases, Steam Actuation Piston Actuator Body Size & Orifice Standard/Large Capacity ("L" designation). End Connections Flanged (ANSI Class 150, 300, or higher). Outlet Pressure Range Field-adjustable, determined by the specific internal pilot installed (e.g., a common range for a 99L could be 5-50 psig or 20-100 psig). The exact range depends on the pilot. 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.
