404338 Hoffman B1125T-3 3/4" Inverted Bucket Steam Trap W/ Thermic Vent

(No reviews yet) Write a Review
This Item Usually Ships The Same Day!
Calculated at Checkout


404338 Hoffman B1125T-3 3/4" Inverted Bucket Steam Trap W/ Thermic Vent. Hoffman Series B Inverted Bucket Steam Traps for efficient condensate drainage of industrial process and HVAC equipment.

Inverted bucket traps rely on the density difference between steam and water to drain condensate as it forms. An inverted bucket floats in condensate that surrounds the bucket. As the bucket moves up and down in the condensate, a linkage connected to the bucket closes or opens a discharge valve trapping the condensate or allowing it to escape. Maximum system efficiency results from steam space being kept free of condensate.


Operation of Bucket Traps:

The trap body must be manually primed at initial start-up. (Under low load or superheat conditions, the trap may also need to be primed.) Under operation, the trap body will remain full of condensate.

An inverted bucket floats in the condensate that surrounds the bucket itself. As the bucket moves up and down in the condensate, a linkage connected to the bucket closes or opens a discharge valve located at the top of the trap, trapping the condensate or allowing it to escape.

During start-up, air is vented through a bleed hole in the top of the bucket into the return line. When air or steam flows into the trap, it enters the underside of the bucket and collects in the top of the bucket. The contained air and steam cause the bucket to become buoyant and rise in the condensate causing the lever mechanism to close the discharge valve into its seat.

The bucket loses its buoyancy as the enclosed steam condenses due to radiation losses and steam escaping through the bucket vent hole. When this happens, the weight of the bucket will cause it to fall and pull the valve off its seat, and the cycle repeats.

An optional thermal vent installed in the bucket allows faster air venting during start-up.

Characteristics of Bucket Traps:

  • Completely drains condensate at saturation temperature.
  • Open bucket design will tolerate moderate water hammer.
  • Normal failure mode is open.
  • Sediment and dirt are kept in suspension until discharged with condensate.
  • Only two moving parts, lever assembly and bucket, leads to reliable operation.
  • Does not sub-cool condensate.
  • Marginal air handling during start-up.
  • Cycles fully open or closed, which can create noise.
  • May lose prime during light loads and blow live steam.
  • Requires manual priming to provide water seal.
  • Does not withstand freezing temperatures.

Primary Applications for Bucket Traps:

Best for stable, steady load and pressure conditions.

  • Process main drip traps for continuous operations.
  • Where condensate is lifted or drains into wet return line.
  • Heat exchangers without a modulating steam regulator.
  • High pressure applications.
  • Drum type roller dryers.
  • Steam separators.
  • Laundry equipment.
  • Siphon or tilting kettles.

Features and Benefits:

  • Stainless steel internal components withstand corrosion.
  • Cast iron bodies for long, dependable life.
  • Wide range of seat pressures available – up to 250 psig to fit a wide variety of applications.
  • B0, B1, B2, B3, and B4 models:
    • Removable covers for easy in-line service.
    • Optional built-in strainer reduces number of piping connections.
    • Optional built-in thermal vent for faster heating. (B1, B2, B3 and B4 models only).

If you have any questions please give us a call at 1-800-781-7405 or email us your request. Sales@NationalPumpSupply.com

View AllClose

Warranty Information

Warranty: Quoted prices include standard factory warranties. Warranty requires install, start-up and operation as per the manufacturers IOM. Job Site Assistance: By Others Start-Up: By Others Commissioning: By Others: These services, if a project requires start up, they are responsibility of contractor or commissioning agent. Owner training assistance, as outlined in any equipment specifications the responsible of the commissioning agent. Clarifications & Exclusions 'ALTERNATES' are offered for consideration and will always be subject to the engineer's and owners approval. Excludes any seismic calculations or supports, coatings other than factory standard. Terms: prices are quoted are "each" (unless stated otherwise) and FOB point of origin with no freight allowed freight ships via common ground carrier, and inside continental US Only - any special shipping requirements to be responsibility of purchaser. We offer all prices less tax, with a validity of 30 days from the date quoted and all sales are final. Once items have shipped and left the warehouse National Pump Supply is not responsible for any damage caused during the shipping process. You must contact the shipper directly and file a claim with the shipping company. Lead Time: All prices offered are based on standard factory lead times (or) as stated within quotation. Expedited shipments may be available at an additional charge. Contact your Sales Engineer for the ETA of any specific equipment on any order or quotation.
View AllClose