Straight Pattern Union Bonnet Valves Straight Pattern Union Bonnet Valves Benefits N Pressure rating up to 6000 psig (410 bar) at 100°F (38°C) N Temperature rating from -6°F to 450°F (-54°C to 232°C) with standard PTFE packing and up to 1200°F (648°C) with optional Grafoil packing N Body materials available in Stainless Steel 316, Carbon Steel and Alloy 400 N 100% factory tested