Armstrong 521 3/4 in SW Inverted Bucket Steam Trap, 5/64 in orifice

Armstrong 521 Series: inverted bucket steam trap from Armstrong International. See the manufacturer documentation linked below for specifications.

Part D678991 is the Armstrong 521 in 3/4 in SW with a 5/64 in orifice.

Model 521 specifications

• Maximum Capacity: 1300 lb/hr (535 kg/hr)
• Maximum Allowable Pressure: 1000 psig (69 barg)
• Maximum Allowable Temperature: 700°F (371°C)
• Body Material: ASTM A105N Forged Steel
• Maximum Operating Pressure: 1000 psig (69 barg)
• Connection Type: Screwed Socketweld Flanged
• Connection Size: 1/2″ (15 mm) 3/4″ (20 mm)
• Flow Direction: Horizontal

Manufacturer documentation: data sheet, installation and maintenance manual.