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2600 Emrick Blvd • Bethlehem, PA 18020 • USA •800-922-0085 • www.warrencontrols.com
INSTALLATION – TYPE 313 OVERFLOW TRAP
MAINTENANCE – TYPE 313 OVERFLOW TRAP
•
To determine which 313 Overflow Trap you have locate
the part number on the factory serial number label (See
Information Present on 313 Overflow Trap section for
location of important information on overflow traps).
Then see 313 Overflow Trap Specifications section to
determine the performance and physical characteristics
of the overflow trap).
• The overflow trap must be installed in vertical pipe with
its inlet up as shown on the installation orientation label
(See Information Present on 313 Overflow Trap section
for location of important information on overflow
traps).
• Downstream piping must be open to atmosphere as
close as possible to output of 313.
• Eliminate vibration in piping. 313 Overflow Traps are
not suitable in installations where vibration exists.
• Before installing, be sure the 313 Overflow Trap and
piping are clean inside and free of scale, chips, welding
spatter, and foreign material. Thoroughly blow out or
flush pipe lines.
• Do not obscure factory serial number label or installation
orientation label with paint.
• Pipe plug must be installed in float chamber during
operation.
OPERATION – TYPE 313 OVERFLOW TRAP
• Deaerators, tanks with steam blankets, produce condensate as the steam condenses. The 313 Overflow Trap traps and
relieves this condensate through its internal pilot while keeping the steam blanket from escaping. Overflow can occur if the
water entering the tank exceeds its capacity. The 313 Overflow Trap relieves the overflow through its internal single seated
main stage valve. Buoyancy of the overflow trap’s internal float ball provides force to actuate the internal pilot operated
single seated valve assembly to relieve condensate and overflow to drain. It is normal for condensate to intermittently flash
to steam as it is relieved to the drain. Steam from the steam blanket however should not be continuously exiting the overflow
trap to the drain.
• 313 Overflow Traps for the most part are
maintenance free when sized and chosen properly
for the application. Maintain the fluid pressure,
pressure drop, and temperature within the limits
of the overflow trap (See Information Present on
313 Overflow Trap section for location of important
information on overflow trap and 313 Overflow Trap
Specifications section to determine the performance
and physical characteristics of the overflow trap).
• The inlet and outlet of the overflow trap must be kept
unblocked. The internal pilot operated single seated
valve assembly must be kept free of debris, deposits,
and dirt. The internal pilot operated single seated
valve assembly must move freely. The float ball must
not become filled with water. The float lever must be
straight. Factory set-up of the overflow trap is shown
on drawing 03130611101.
• The water level inside the float chamber must cover
the windows in the valve body in order for the main
stage to open.
• Perform Float Ball Level Test during scheduled
maintenance periods. Float ball level must be correct
for water to be at correct level in the float chamber.
A set-up fixture may also be fabricated as shown on
drawing 03130614111 to test and set the float ball
level.
• Pipe plug must be installed in float chamber during
operation.
