Bell & Gossett HS 232C Series I In-line Float and Thermostatic Steam Traps - Manual (Page 8)

Xylem Inc.
8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: (847) 966-3700
Fax: (847) 965-8379
www.xyleminc.com/brands/bellgossett
Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 2012 Xylem Inc. HS-232C October 2012 Part No. 510987
TROUBLESHOOTING
We recommend trap replacement when parts no
longer operate properly. A new trap or a complete
cover assembly is more economical than repairing or
replacing individual parts, and it will provide greater
reliability. If you choose to repair the trap, order
Hoffman Specialty replacement parts and follow the
Repair Procedure provided.
Problem:
1.
Improper Heating
a.
Cause: The float assembly is not opening or
functioning properly. This could be
caused by a leak in the float.
Test: Use a thermometer to test inlet tem-
perature. A cold trap is an indication
the trap failed closed.
Solution: Disassemble the trap. Shake the float,
listening for water, and inspect for leaks.
Replace any worn or defective parts.
b.
Cause: The steam pressure is higher than
the trap’s seat rating pressure which
prevents the trap from opening.
Test: Check the seat pressure rating on the
In-line F&T trap nameplate with the
available steam pressure to the
equipment being drained.
Solution: Install a new Hoffman Specialty Bear
Trap ® with the proper pressure range.
Note: The trap must be selected for
the maximum differential pressure that
will be encountered. A high pressure
seat may be used at lower differential
pressures, but the capacity rating will
be less than an identical size trap with
a low pressure rated seat.
c.
Cause: Full capacity drainage is prevented
by worn linkage.
Test: Disassemble the trap and inspect for
worn parts.
Solution: Install a new Hoffman Specialty In-
line F&T Bear Trap ® .
Problem:
2.
Energy Wasted
a.
Cause: A worn pin and seat, or dirt deposited
on the seat prevents tight closure.
Test: Using a stethoscope, listen for a low
pitch whistle sound. A low pitch whis-
tle sound indicates the trap is open
and blowing live steam.
Solution: Disassemble the trap and inspect for
dirt or worn parts. Clean if dirty, or
replace if worn.
b.
Cause: The thermostatic element failed open
and is blowing live steam.
Test: Using a stethoscope, listen for a low
pitch whistle sound. A low pitch whis-
tle sound indicates the trap is open
and blowing live steam.
Solution: Disassemble the trap and replace the
thermostatic element