Bell & Gossett HS 619B Series 754 Self-Contained Pressure Reducing Regulator - Manual (Page 4)

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-619B October 2012 Part No. 511140
• To prevent serious burns, the
internal pressure of the regulator
must be 0 psi (0 bar) before
servicing.
• Connect a pipe to the blow
down valve in such a way as to
prevent exposure and injury from
discharge.
Failure to follow this caution will
cause personal injury.
TROUBLESHOOTING
We recommend replacing the Series 754
Regulator when parts no longer operate
properly. A new regulator is more economical
than repairing or replacing individual parts, and it will
provide greater reliability.
Problem:
1.
Inadequate outlet pressure.
a.
Cause: The regulator is not adjusted properly.
Solution: Loosen the locknut on the adjusting
screw and turn it counterclockwise.
b.
Cause: Dirt in the strainer.
Solution: Open the Y-strainer’s blow down gate
valve and allow full steam pressure to
flow for two minutes.
c.
Cause: Steam supply pressure is low.
Solution: Correct boiler steam pressure
problem.
d.
Cause: Dirt under the seat, or the seat is
worn.
Solution: Disassemble regulator and inspect,
replace if necessary.
MAINTENANCE
SCHEDULE:
PROCEDURE:
• Initially, every 2-3 days after start-up until system
is clean.
• Every 6 months thereafter.
1. Inspect joints for leaks. Stop all leaks by tightening
bolts.
2. Clean strainers by opening the
Y-strainer’s
blow down gate valve and allowing full steam
pressure to flow out for (2) two minutes. Then,
close the valve.
3. If steam escapes from the vent hole in the spring
housing area, replace the diaphragms.
! WARNING