AERCO Float and Thermostatic Traps Series X User Manual
Hoffman Specialty
Installation & Maintenance
Instructions
HS-222(E)
Float and Thermostatic Traps
Series H, C and X
• Before using product, read and understand instructions.
• Save these instructions for future reference.
• All work must be performed by qualified personnel trained in the proper application,
installation, and maintenance of steam systems in accordance with all applicable codes
and ordinances.
• To prevent serious burns, wear heat resistant gloves when opening and closing steam
valves, or handling hot equipment.
• To prevent serious burns, the internal pressure of the trap must be 0 psi (0 bar) before
servicing.
• To prevent serious personal injury from steam pipe blow down, connect a temporary
pipe between the steam pipe opening and a drain, or stand at least 100 ft. (30 m) from
the front of the pipe opening.
• To prevent property damage, personal injury, or death, cap off the gate valves if they are
not connected to a drain and when they are not in use for test or pressure relief.
Failure to follow this warning could cause property damage, personal injury or death.
!
WARNING
CAUTION
WARNING
®
Series C
1
1
⁄4 & 11⁄2 NPT
Series C
2 NPT
Series X
2 NPT
Series C
2
1
⁄2 NPT
Series H
Ratings
Maximum Max. Operating
NPT Size - in. Temperature Pressure
°F (°C) psig (bar)
3
⁄4
”, 1” and
11⁄4
” H
406 (208)
175 (12.1)
11⁄4
” C and All
11⁄2
” -
21⁄2
”
377 (192)
INLET
TEST
INLET
OUTLET
OUTLET
TEST
OUTLET
INLET
TEST
INLET
OUTLET
TEST
2
1. Determine where to install the trap, based on the
following requirements:
• The trap must be located as close as possible to, and
below the equipment to be drained.
• The trap must be in a straight run of horizontal pipe as
shown in the “Typical Piping Diagrams,” and pitched to
allow condensate to flow into trap inlet, and away from
trap outlet.
• Allow for enough space around the trap for servicing,
which may include removal of the body or cover,
depending on the model you are installing.
The Hoffman Series H traps provide an additional opening
where a test valve may be installed. On traps that do not
have an additional opening, the test valve can be installed
in a tee fitting in the discharge line.
OPERATION
Float and thermostatic traps have two basic elements: a
thermostat for venting air from the system during start-up
and a float assembly for draining condensate.
The thermostat is normally open. It allows air to vent until it
is within 10-30°F (4-12°C) of the steam temperature.
The float assembly drains condensate from the system
when buoyancy force lifts the float ball and opens the
valve. The weight of the float ball causes the pin to close
against the trap seat when condensate is not present.
Materials of Construction
Part Specifications
Body and Cover Cast Iron 30,000 psi tensile
Valve Pin and Seat Stainless Steel (Hardened)
Float Stainless Steel
Lever Assembly Stainless Steel
Thermostatic Air Vent Stainless Steel Cage and
Thermal Element
Cover Bolts Grade 5
Baffle Stainless Steel {21/2” units only}
To prevent serious personal injury from steam
pipe blow down, connect a temporary pipe
between the steam pipe opening and a drain,
or stand at least 100 ft. (30m) from the pipe
opening.
Failure to follow this warning could cause
property damage, personal injury, or death.
!
WARNING
INSTALLATION –
Series H, C and X Float and
Thermostatic Steam Traps
STEP 1
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