Description
Armstrong International Series 811 Cast Iron Inverted Bucket Steam Trap
The Armstrong International 811-3/4-200 is a heavy-duty cast iron inverted bucket steam trap engineered for reliable, continuous condensate removal in demanding steam systems. Part of the trusted Series 811 lineup, this trap features a 3/4″ NPT connection and is rated for operating pressures up to 200 PSI, making it well-suited for a wide range of commercial and industrial steam heating applications.
How It Works
The inverted bucket mechanism provides a time-tested, mechanically simple approach to steam trapping. As condensate fills the trap body, the inverted bucket loses buoyancy and sinks, opening the discharge valve to release condensate. When steam or air enters, the bucket floats and closes the valve — preventing live steam loss and maintaining system efficiency. The 7/64″ orifice is precisely sized to balance condensate capacity with steam conservation.
Key Features
- Series 811 cast iron inverted bucket steam trap
- 3/4″ NPT inlet and outlet connections
- 200 PSI maximum allowable pressure (MAP)
- 7/64″ orifice for optimized condensate discharge
- Durable cast iron body for long service life
- Reliable mechanical operation — no external power required
- Suitable for steam heating, process, and distribution applications
Specifications
- SKU: 811-3/4-200
- Brand: Armstrong International
- Series: 811
- Connection Size: 3/4″ NPT
- Maximum Allowable Pressure: 200 PSI
- Orifice Size: 7/64″
- Body Material: Cast Iron
- Trap Type: Inverted Bucket
Applications
- Steam distribution and process piping
- Commercial and industrial heating systems
- Heat exchangers and coils
- Steam tracing lines
- Drip trap service on steam mains
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