Emerson B83 Manuel d'instruction - Page 5
Parcourez en ligne ou téléchargez le pdf Manuel d'instruction pour {nom_de_la_catégorie} Emerson B83. Emerson B83 8 pages.
Imprimer la pageWHEN THIS
HAPPENS
1. Condensate not reaching the trap:
a. Pipe and fittings between equipment and trap plugged by dirt.
b. Strainer clogged by dirt.
2. Condensate not passing through trap.
a. Trap discharge orifice blocked by dirt.
Trap not discharging -
b. Pipe and/or fittings between trap and return man plugged by dirt.
cool to touch
3. Valve, upstream or downstream, not open or failed in
closed position.
4. Bellows has developed a leak or crack.
1. Trap, strainer or piping partially obstructed by dirt.
2. Valve, upstream or downstream, not open wide.
Trap discharging
3. Trap too small for condensate load.
condensate
4. Condensate load has increased since trap was installed.
continuously -
a. Boiler priming or foaming.
warm to touch
b. Leak in submerged coil of equipment.
c. Other traps have failed transferring condensate to
overloaded trap.
1. Trap valve not closing tight
a. Scale or dirt between valve and seat.
b. Valve or seat or both, eroded and worn.
2. Trap has been dropped - bellows misaligned so valve
Trap discharging
cannot seat.
live steam
3. Mistaking open or leaking by-pass valve for trap leak.
4. Bellows damaged by waterhammer.
1. Steam pressure too low for temperature required by process.
a. Pressure throttled by thermostatically controlled steam
supply valve.
b. Increased demand for steam throughout the plant.
c. Steam piping too small for adequate supply.
2. Pressure differential across trap too low.
a. Steam pressure less than when trap was installed.
b. Return line pressure higher than when the trap was installed.
Slow warm-up or
temperature of
equipment drained
too low.
3. Short circuiting caused by group trapping.
4. Trap steam-locked.
a. Long horizontal piping between equipment and trap.
b. Trap above drain outlet of equipment - no water seal at bottom
of riser.
c. Siphon-drained equipment - rotary dryers and tilting
jacketed kettles.
5. Apparatus drained by siphon pipe.
Table 1. Troubleshooting
HERE IS WHERE THE TROUBLE MAY BE
AND HERE IS WHAT TO DO
a. Remove the obstruction.
b. Blow out or clean strainer.
a. Clan trap and install strainer.
b. Remove obstruction.
Open or repair valve.
Replace the bellows. Check for corrosive condition and, if
present, substitute bellows material.
Remove the obstruction, blow down strainer and clean trap.
Open valve wide.
Add another trap in parallel or replace with larger trap
a. Correct the boiler condition.
b. Repair leak or replace coil/tube.
c. Locate and repair/replace faulty traps.
a . Clean trap and install strainer.
b . Replace valve and seat with a matched set.
Replace bellows and inspect trap for other damage.
Remove the by-pass if permissable, otherwise close or
repair valve.
Replace bellows, eliminate cause of waterhammer.
a. Check for lowest throttled pressure and increase if feasible.
b. Increase boiler capacity if possible. Shut down
unneeded equipment.
c. Increase steam pressure or replace piping with larger size.
a. Raise pressure to former level.
b. Return main too small. Other traps discharging live steam into
return main. Repair or replace faulty traps. Obstruction in return
main or discharge piping.
See Installation Step 5.
a. See Installation Step 2.
b. See Installation Step 13.
Examine siphon for break or leak.
B Series
5