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Inverted Bucket Traps

Inverted Bucket Steam Traps

This steam trap is composed of :
• a reservoir
• bucket
• seat and disc.

Operation :
Inverted bucket traps, as their name suggests, operate like an upside down bucket in water. During startup, the trap is filed with water with the bucket at the bottom allowing condensate to flow through. At temperature, the steam enters under the bucket causing it to float and close the valve. Any condensate entering the line is forced up into the bucket. This causes the bucket to lose buoyancy and drop down, which in turn opens the valve and discharges the condensate.

Advantages :
– Naturally resists dirt, scale and water hammer .
– Low cost of installation and maintenance.

Disadvantages :
– Must be primed to function.
– On/off cycling, no modulation.
– large size for higher capacities

Dura-Flo Inverted Bucket Nicholson Steam Trap
The Nicholson Dura-Flo Traps have an integrated strainer (S).
The Nicholson Series 80 is compatible with the Armstrong 800 Series.

Dura-Flo Inverted Bucket Steam Trap 80S Series

Horizontal Installation
Five models available :

80S
Pressure use up to 150 psi
Connections 1/4″ & 1/2″ – NPT
Capacity ( in lbs / hour ) :

  • up to 20 psi : 690
  • up to 80 psi : 690
  • up to 150 psi : 570

81S
Pressure use up to 250 psi
Connections 1/4″ & 1/2″ – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 1060
  • up to 125 psi : 950
  • up to 250 psi : 760

82S
Pressure use up to 250 psi
Connections 1/4″ & 1/2″ – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 2100
  • up to 125 psi : 2000
  • up to 250 psi : 1300

83S
Pressure use up to 250 psi
Connections 1/2″ & 1” – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 3900
  • up to 100 psi : 3900
  • up to 150 psi : 3500

85
Pressure use up to 250 psi
Connections 1 1/4″ & 2” – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 10000
  • up to 100 psi : 10400
  • up to 150 psi : 7000
DOWNLOAD BROCHURE
Dura-Flo Inverted Bucket Steam Trap Series 20

Vertical Installation
Five models available :

21
Pressure use up to 250 psi
Connections 1/4″ – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 106 0
  • up to 125 psi : 95 0
  • up to 250 psi : 760

22
Pressure use up to 250 psi
Connections 1/4″ & 1/2″ – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 2100
  • up to 125 psi : 2000
  • up to 250 psi : 1300

23
Pressure use up to 250 psi
Connections 1/2″ & 1” – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 3900
  • up to 100 psi : 3900
  • up to 250 psi : 3500

25
Pressure use up to 250 psi
Connections 1” & 1 1/4″ – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 10000
  • up to 100 psi : 10400
  • up to 250 psi : 7000

26
Pressure use up to 250 psi
Connections 1 1/4″ & 2” – NPT
Capacity ( in lbs / hour ) :

  • up to 15 psi : 1920 0
  • up to 80 psi : 1900 0
  • up to 250 psi : 1900
DOWNLOAD BROCHURE
Dura-Flo Inverted Bucket Steam Traps PCA Repair Kit Guide
Dura-Flo Series Capacity Tables
THERMOSTATIC TRAPS
FLOAT TRAPS
THERMODYNAMIC TRAPS