Evoqua Wallace&Tiernan 50-200 Series, Руководство пользователя

Страница: 52 / 111

50-200 EVAPORATOR FOR CHLORINE
WT.050.200.001.UA.IM.0814
41
EVOQUA W3T98237
WARNING: TO AVOID SEVERE PERSONAL INJURY DUE TO INHALATION
OF CHLORINE, USE AN APPROVED GAS MASK AND VENTILATION EQUIP-
MENT WHEN REMOVING THE RUPTURE DISC.
If the disc is removed and is not ruptured, a leaking disc is the trouble. In this
case, a closed valve and/or blockage are not likely to be found. Replace the
rupture disc.
CAUTION: When installing the rupture disc, ensure that the groove of disc
fits the mating tongue of the safety head to avoid altering the operating level
of the rupture disc.
WARNING: TO AVOID THE RUPTURE OF THE EVAPORATOR PRESSURE
CYLINDER OR ITS CONNECTING PIPELINES, CAUSING POSSIBLE SEVERE
PERSONAL INJURY AND EQUIPMENT DAMAGE, DO NOT ATTEMPT TO
DISASSEMBLE OR REPAIR THE RELIEF VALVE. IF IT MALFUNCTIONS,
REPLACE IT.
CAUTION: Purge the valve of gas as soon as possible after operation before
moisture can combine with the gas to become corrosive.
4.11 Liquid Line Pressure Relief System
Overpressure in the liquid line is usually the result of a valve closed at the
supply and at the evaporator at the same time. A contaminant blockage in
the inlet line with a valve closed on either side can also cause an overpressure
problem. The rupture disc will rupture at 400 psi, activating an alarm. If the
system activates, as indicated by the alarm switch, the cause must immediately
be determined and corrected. Usually, corrective action will involve opening
one or more valves. To restore the liquid line pressure relief system, replace
the rupture disc as instructed in the preceding section.
WARNING: TO AVOID MAJOR RELEASE OF CHLORINE, CAUSING POS-
SIBLE SEVERE PERSONAL INJURY, DO NOT OPEN THE LIQUID LINE
PRESSURE RELIEF SYSTEM WHILE THE EVAPORATOR IS PRESSURIZED.
Before attempting to service the relief system, follow step a in paragraph 4.12,
“In-Place” Cleaning Of Evaporator Cylinder.
CAUTION: Do not disturb the threaded joints between the alarm switch and
the protective capsule. Any oil loss will result in a faulty pressure-gauge reading.
If this rupture disc is removed and is not ruptured, a leaking disc is the trouble.
In this case, closed valves and/or blockage are not likely to be found. Replace
leaking rupture disc. If the pressure switch remains actuated after perform-
ing step a in paragraph 4.12, “In-Place” Cleaning of the Evaporator Cylinder,
chlorine is still under pressure in the pressure relief system. This indicates a
leaking (not ruptured) rupture disc.
!
!
!
!
!
!