Dollar Loss Tables

INVERTED BUCKET TRAPS
Steam Cost @ $6/1000
Due to the many different orifice sizes in the many different models of inverted bucket traps the guide below is a really “rough” estimate of the potential steam loss. For example: one model listed as 3/4″ bucket trap made for 15 psig steam will utilize a 1/2″ orifice for high condensate capacity applications; whereas another model listed at 3/4″ bucket trap for 15 psig steam will utilize a 1/4″ orifice. The differences in potential steam loss between the two are significant. Therefore, we have tried to be very conservative when assigning the orifice size in the table below. The actual dollar loss may be significantly different depending upon the specific model of the trap.

The orifice sizes in the table below are referenced from one manufacturer and are listed only as examples to consider the cost of steam leaking through a steam trap.

 

Pressure @ Trap 2 psig 5 psig 10 psig 15 psig 25 psig 50 psig
PIPE SIZE * Assigned orifice sizes employed in the traps below when under the differential steam pressure shown.
1/2″ *1/4″ *1/4″ *1/4″ *1/4″ *1/4″ *5/32″
Dollar Loss/Month $22 $32 $40 $48 $65 $41
3/4″ *5/16″ *5/16″ *5/16″ *5/16″ *1/4″ *3/16″
Dollar Loss/Month $34 $50 $63 $76 $65 $60
1″ *1/2″ *1/2″ *1/2″ *1/2″ *3/8″ *11/32″
Dollar Loss/Month $86 $129 $162 $194 $145 $199

 

Pressure @ Trap 75 psig 100 psig 125 psig 150 psig 200 psig 250 psig
PIPE SIZE * Assigned orifice sizes employed in the traps below when under the differential steam pressure shown.
1/2″ *1/8″ *1/8″ *1/8″ *7/64″ *7/64″ *3/32″
Dollar Loss/Month $37 $47 $57 $53 $68 $72
3/4″ *5/32″ *5/32″ *5/32″ *1/8″ *1/8″ *7/64″
Dollar Loss/Month $57 $73 $89 $67 $87 $84
1″ *9/32″ *1/4″ *1/4″ *7/32″ *3/16″ *3/16″
Dollar Loss/Month $185 $187 $229 $206 $197 $244

FAILED STEAM TRAP DOLLAR LOSS TABLE FOR RADIATOR TRAPS
Steam Cost @ $6.00/1000 lbs.
Pressure balanced thermostatic radiator traps are most commonly found on low pressure (25 psig and under) steam heating systems. Located on radiators, convectors and other radiant heat units, there may be literally hundreds of these scattered throughout larger facilities. The operating unit within the trap, a pressure-balanced disc or bellows, is filled with a distilled liquid to respond to the changes in temperature (i.e. pressure) within the trap. The disc or bellows will generally “fail open” after three to five years of hard work (after five years it has opened and closed hundreds of thousands of times). The orifice sizes (*) shown, for all the steam traps, are conservative estimates of the average size found in these traps. Actual dollar loss may be more or less than shown.

Pressure 
@ Trap
2 
psig
5 
psig
10 
psig
15
psig
25 
psig
50 
psig
75 
psig
100 psig 125 psig 150 psig
PIPE SIZE *Assigned orifice size in the steam trap styles and sizes
per differential operating pressures as shown.
1/2″ *1/4″ *1/4″ *1/4″ *1/4″ *1/4″ *7/32″ *7/32″ *7/32″ *7/32″ *3/16″
Dollar Loss/Month $22 $32 $40 $48 $65 $81 $112 $143 $175 $151
3/4″ *5/16″ *5/16″ *5/16″ *5/16″ *5/16″ *1/4″ *1/4″ *1/4″ *1/4″ *7/32″
Dollar Loss/Month $34 $50 $63 $76 $101 $106 $147 $187 $229 $206
1″ *3/8″ *3/8″ *3/8″ *3/8″ *3/8″ *5/16″ *5/16″ *5/16″ *5/16″ *9/32″
Dollar Loss/Month $48 $72 $91 $109 $145 $165 $229 $294 $357 $341

DOLLAR LOSS TABLE FOR FLOAT AND THERMOSTATIC TRAPS
Steam cost @ $6.00/1000 lbs.
Float & Thermostatic (F&T) traps are found where higher levels of condensate are produced (Unit heaters, end-of-mains, heat exchangers, etc.) The modulating control provided by the float allows for continuous discharge of condensate when necessary. The air vent in this trap will generally “fail open” after three to five years of hard work. The mechanism and float assembly, which allows the condensate to discharge, may operate efficiently for eight to ten years, and will normally “fail closed” after this time. However, sludge and debris accumulation may cause the assembly to fail open and waste “big bucks” as shown. Actual dollar loss may be more or less than shown.

 

Pressure @ Trap 2 
psig
5 
psig
10 
psig
15 
psig
25 
psig
50 psig 75 psig 100 psig 125 psig 150 psig
LOSS FROM AIR VENT: The air vents in all the F&T traps generally utilize a 1/4″ discharge orifice.
Dollar Loss/ Month $22 $32 $40 $48   $105 $147 $187 $229 $270
PIPE SIZE *Assigned orifice size utilized by the mechanism assembly per sizes and differential pressures shown.
3/4 & 1″ *1/4″ *1/4″ *1/4″ *1/4″ *3/16″ *1/8″ *1/8″ *3/32″ *3/32″ *3/32″
Dollar Loss/ Month $22 $32 $40 $48 $37 $26 $37 $26 $32 $38
1 1/4″ *5/16″ *5/16″ *5/16 *5/16″ *1/4″ *3/16″ *3/16″ *1/8″ *1/8″ *1/8″
Dollar Loss/ Month $34 $50 $63 $76 $65 $60 $83 $47 $57 $67
1 1/2″ *13/32″ *13/32″ *13/32″ *13/32″ *5/16″ *7/32″ *7/32″ *5/32″ *5/32″ *5/32″
Dollar Loss/ Month $57 $85 $105 $129 $101 $81 $112 $73 $89 $105
2″ *1/2″ *1/2″ *1/2″ *1/2″ *15/32″ *7/16″ *7/16″ *5/16″ *5/16″ *5/16″
Dollar Loss/ Month $86 $129 $162 $194 $228 $324 $516 $294 $357 $421


©2019 UE Systems