Selection
Guide Chart
The proper type of steam trap selected is an
important consideration in steam systems.
There are many types of steam traps. Each
has unique characteristics and system bene-
fits. Hoffman Specialty offers thermostatic,
float and thermostatic, bucket
and disc traps. This line chart points out sys-
tem conditions that may be encountered and
suggests a trap that may best handle the
requirement. Several types of traps may be
used for a specific application. The line chart
should be used only as a guide.
10
Chapter 1
Condensate must be completely
removed at saturation condition
to prevent water hammer
Type of Steam Trap Required
Based on System Conditions
Modulating load,
wide range of
condensate load
Water hammer
due to
wet returns or lifts
Float and
thermostatic
Bucket trap
with thermal
vent
Bucket
trap
Disc
trap
Constant
load
Outdoor
location
Super heat or
water hammer
Fast air
venting
required
Air vent
rate not
important
Fast air
venting
required
Condensate may be sub-cooled
ahead of trap to improve
operating efficiency of system
Varying pressure and load where fast
response is required
Pressure
up to 125 psig
Thermostatic bellows type trap
Pressure
over 175 psig
