McMaster 4784K34 High Pressure Gradual On Off Valve, Pressure Class 800, Steel, Standard Port, 3 4 NPT Female G3908051 100 Grade A Secondary Scale 100 Grade A Secondary Scale Units bar Dry Dampening Feature None Non Sparking No Scale Type Dual Accuracy Scale Mid Scale Sensor Material Copper Alloy Cleaned for Oxygen Service No Pointer Material Aluminum Pressure Range Type Pressure Secondary Pressure Range 0 to 345 Removable Bezel No Dial Color White Includes Mounting Hardware No Primary Scale Minor Graduations 100 Bezel Mounting Type Fixed Pressure Gauge Type Industrial Pressure Gauge Process Connection Gender Male Includes Calibration Certificate No Field Fillable No Ambient Operating Temperature Range 30 Degrees to 180 Degrees F Includes Vent Plug Yes Vibration Resistance Liquid Filled Gauge Case Liquid Glycerin Maximum Pressure 5000 Operating Temperature Range 30 Degrees to 160 Degrees F Case Liquid Glycerin NEMA Enclosure Rating No Enclosure Primary Scale Vacuum Measurement Maximum 5 these O rings can handle sudden pressure changes that would cause softer O rings to crack or deform temperature Designed for use in refineries and other demanding environments