300 Series Inverted Bucket Steam Traps


Forged carbon steel for vertical installation

For pressures to 650 psig (45 bar) . . .
Capacities to 20,000 lb/hr (9072 kg/hr)

Armstrong offers its 300 series forged carbon
steel traps for vertical installation with a choice of screwed,
socketweld or flanged connections.

A unique leverage system multiplies the force
provided by the bucket to open the valve against system pressure. The
mechanism is free-floating and has no fixed pivots to create wear or

Because the mechanism is located at the top of
the trap, no dirt can collect on the orifice. Small particles of dirt
are held in suspension until discharged by the full differential purging
action when the bucket sinks, pulling the valve off the seat.

The discharge orifice is surrounded by a water
seal, which prevents live steam loss. Automatic air venting is provided
by a small vent hole in the bucket, which provides continuous automatic
air and CO2 venting at steam temperature.

Inverted bucket traps drain continuously,
although discharging intermittently, allowing no condensate backup. They
are also resistant to water hammer.

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Product Literature

Installation and Maintenance 

Submittal Drawing 

300 Series Inverted Bucket Steam Traps

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