Carbon Steel or Stainless Steel for Vertical Installation

Armstrong’s 401-SH/501-SH Series inverted bucket steam trap line is made for overcoming the difficult combination of superheat and high pressure/low load service.

To survive this most severe steam service, Armstrong created an inverted bucket trap with a unique accumulation chamber. The chamber collects sufficient condensate to ensure full discharge cycles. A cup in the chamber floats up and down on the steam inlet tube, sealing it off as the condensate level rises. At the same time as the chamber collects condensate, steam continues to flow under the bucket, making sure that the discharge valve closes tightly until the condensate rises into the trap body and the bucket falls down. The operation is on/off, no throttling or dribbling.

Furthermore, it combines all the advantages of an inverted bucket steam trap:

• High resistance to wear, corrosion and water hammer with no gaskets.
• A unique leverage system multiplies the force provided by the bucket,
  to open the valve against system pressure.
• The mechanism is located at the top. No dirt can collect on the orifice.
  Small particles of dirt will be held in suspension until discharged by the full
  differential purging action.
• The discharge orifice is surrounded by a water seal, preventing live steam
  loss. Automatic air venting is provided by a small hole in the bucket.
• Inverted bucket traps require no adjustment.