Description
Armstrong International Series 811 Cast Iron Inverted Bucket Steam Trap
The Armstrong International 811-1-15 is a Series 811 Cast Iron Inverted Bucket Steam Trap engineered for dependable, energy-efficient condensate discharge in commercial and industrial steam systems. With a 1″ NPT connection, a 15 PSI operating pressure rating, and a 1/4″ orifice, this trap delivers consistent performance across a wide range of steam heating and process applications.
How Inverted Bucket Steam Traps Work
Inverted bucket traps use the buoyancy principle to distinguish between steam and condensate. When steam enters the bucket, it floats and closes the discharge valve — retaining live steam in the system. As condensate accumulates, the bucket sinks and opens the valve, allowing condensate to drain efficiently. This mechanical action provides continuous, reliable operation with minimal energy waste.
Key Features
- Series 811 Cast Iron body construction for durability in demanding steam environments
- 1″ NPT inlet/outlet connections for straightforward installation into standard piping
- 15 PSI maximum operating pressure rating
- 1/4″ orifice for controlled condensate discharge flow
- Inverted bucket mechanism provides reliable, self-purging operation
- Designed for commercial and light industrial steam heating systems
Specifications
- Brand: Armstrong International
- Model / SKU: 811-1-15
- Series: 811
- Body Material: Cast Iron
- Trap Type: Inverted Bucket
- Connection Size: 1″ NPT
- Maximum Operating Pressure: 15 PSI
- Orifice Size: 1/4″
Applications
- Steam heating mains and branch lines
- Unit heaters and convectors
- Steam distribution and condensate return systems
- Light industrial process steam applications
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