Technical Parameters。 Category Parameter Specification / Description General Model Series 377 Type Pilot-Operated Pressure Reducing Regulator Valve Style Balanced, Single-Port, Semi-Soft Seated Pressure Ratings Body Rating (ANSI) ANSI Class 150, 300, 400, 600, 900 (depending on body size and material) Max. Inlet Pressure (P1) Up to 1440 psig (100 bar) for certain sizes and classes. Outlet Pressure Range (P2) Adjustable via pilot spring. Wide range, from a few psig to over 1000 psig, depending on the pilot and spring. Flow & Sizing Flow Capacity (Cv) Ranges from approximately 30 to over 1000+ depending on the valve size (e.g., 1", 2", 3", 4", 6", 8"). End Connections Flanged (RF, RTJ) according to ANSI standards. Temperature & Materials Process Fluid Temp. Standard: -20°F to 150°F (-29°C to 66°C). Extended ranges with different seals/materials. Body Materials Carbon Steel (Standard), Ductile Iron, Stainless Steel. Trim Materials Stainless Steel Trim. Semi-Soft Seat (e.g., TFE, Nylon, Kel-F). Pilots & Options Standard Pilot 377 Pilot (Reducing Pilot) - senses downstream pressure. Common Options • Monitor Pilot: For overpressure protection. • SLM (Slow Opening) Pilot: For safe start-up. • Relief Pilots: To act as a backpressure regulator.