Armstrong International 880-3/4-20 3/4″ NPT 20 PSI Cast Iron Inverted Bucket Steam Trap

Description

The Armstrong International 880-3/4-20 is a Series 880 Cast Iron Inverted Bucket Steam Trap engineered for dependable condensate and air removal in low- to medium-pressure steam systems. Built with a rugged cast iron body, this trap is designed for long service life in demanding commercial and industrial HVAC and process heating applications.

Key Features

• Series 880 inverted bucket steam trap design for continuous, reliable condensate drainage
• Cast iron body construction for durability in steam system environments
• 3/4″ NPT inlet and outlet connections for straightforward installation
• Rated for 20 PSI maximum operating pressure
• 3/16″ orifice for optimized condensate flow and steam loss prevention
• Inverted bucket mechanism provides fail-open safety — prevents steam system flooding on trap failure
• Suitable for steam mains, unit heaters, heat exchangers, and drip legs

Specifications

• Brand: Armstrong International
• SKU / Model: 880-3/4-20
• Series: 880
• Body Material: Cast Iron
• Connection Size: 3/4″ NPT
• Maximum Operating Pressure: 20 PSI
• Orifice Size: 3/16″
• Trap Type: Inverted Bucket

Application

The Series 880 inverted bucket steam trap is ideal for use on steam distribution mains, drip stations, unit heaters, and process equipment where reliable condensate removal is critical. The inverted bucket mechanism responds to the difference in density between steam and condensate, opening to discharge liquid and closing to retain live steam — maximizing energy efficiency and system performance. The fail-open design ensures that in the event of bucket failure, condensate can still drain freely, protecting downstream equipment from water hammer and flooding.