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
|