BONOMI SERIES 511SL FULL PORT SAFETY EXHAUST STAINLESS STEEL BALL VALVE, FNPT THREADEDExhaust Stainless steel Ball Valve with Bleed Hole and Latch Lock Handle; Pressure rating 400 psi air service; Temperature range: 20F to 450F; Blow out proof stem; P. T. F. E. seats, seals and thrust washer; Adjustable stem packing; 100% electronically tested in the open position at 80 psi; Valve to be used in fully open or fully closed position; With reference to OSHA requirement; ANSI B1. 20. 1 connections;