Armstrong's 2000 Series inverted bucket steam traps are all stainless steel with a 360-degree universal connector for quick in-line replacement. The sealed, tamper-proof trap is compact, withstands freeze-ups without damage, resists corrosion and carries a three-year guarantee. Model 2011 is available with a thermic vent.Part D3184-1 is the Armstrong 2022, rated 300 psig maximum operating pressure.Model 2022 specifications Maximum Capacity: 1300 lb/hr (590 kg/hr) Maximum Allowable Pressure: 650 psig @ 600°F (45 bar @ 316°C) Maximum Allowable Temperature: 600°F (316°C) Body Material: ASTM A240 Grade 304L Stainless Steel Maximum Operating Pressure: 650 psig (45 bar) Connection Type: 2-Bolt Screwed Socketweld Flanged Connection Size: 3/8″ (12 mm) 1/2″ (15 mm) 3/4″ (20 mm) 1″ (25 mm) Manufacturer documentation: data sheet, installation and maintenance manual.