Manual Evaporador
Enviado por lucial27 • 25 de Abril de 2012 • 916 Palabras (4 Páginas) • 546 Visitas
Features
Reliable, Automatic Operation
To help prevent overfilling, the liquid
level in the pressure cylinder is selfadjusting.
Level in the water-bath tank
is maintained by a solenoid that controls
make-up water flow. A thermostat
maintains hot water temperature.
Alarms and readout monitor operation
of the liquid-evaporation and hot water
systems.
External Heater
The electric water heater is external to
the water-bath tank, assuring uniform
heat distribution. This prevents “hot
spots” and minimizes the possibility of
liquid being heated in excess of 100° C
(212° F), causing pressure build-up that
could trigger gas relief.
Alarms and Monitors
A sight glass for water-bath level and a
water temperature gauge help monitor
water-bath conditions. Electronic
switches provide accurate and reliable
water-temperature regulation. Gas
pressure and temperature gauges are
included. There are high- and low-alarm
switches for water-bath temperature and
low-water level. An automatic pressurerelief
system in the gas outlet is standard.
A similar relief system in the liquid-inlet
line is also standard. Both systems have
high-pressure alarm switches.
Weather-Resistant
The evaporator enclosure is made of
rugged, pressure-formed ABS panels.
An optional, gasketed ABS rear cover
added to the enclosure makes it weather
resistant. This arrangement is ideal for
outdoor service, especially at power
plants.
Meets Code Requirements
The Wallace & Tiernan® Series 50-200
Evaporator conforms to ASME standards
and meets recommendations of the
Chlorine Institute. The pressure cylinder
and water-bath tank are cathodically
protected against corrosion. The tank
is heavily galvanized inside and out.
The pressure cylinder and gas pressure-
Water-level sight glass is at left of panel.
Left side of panel has indicator lights
for high-water temperature (red), lowwater
temperature (amber), and at
bottom, low-water level (red). At top are
gas temperature and pressure gauges.
Meters in center of panel are for water
temperature and cathodic protection
control, and the power-disconnect
switch is at the right of the panel.
relief valve comply with ASME Boiler
and Pressure Vessel Code, Section VIII,
Division I.
Pre-Wiring and Other Installation
Economies
Pre-wiring of all evaporator controls and
components is completed at the factory
and included as standard. Electrical
installation requires only connecting
external power to a coded terminal
strip. Only one 3-phase power supply
is required; a transformer in the panel
supplies 115-volt power for control
functions. There are seven nominal
voltages available for the heat exchanger.
Three sets of unpowered customer
alarm contacts are standard: high water
temperature, low water temperature,
and low water level.
Easy to Clean
The top of the pressure cylinder is a
bolted flange removable for access to the
interior. A bottom connection allows the
cylinder to be flushed in place. An access
hole in the water-bath tank permits
inspection of the cylinder exterior and
the tank interior. The enclosure is easily
removed for access to the evaporator
interior.
Easy to Install
The evaporator is shipped completely
assembled. The vapor vent and overflow
drain are piped separately to ensure
adequate water-bath overflow. The
electric heating elements are mounted
from the top of the water heater. Liquidinlet
connections can be made at the
top or bottom; bottom connections are
required for evaporators connected to a
common liquid supply. Using the bottom
connection helps maintain liquid levels
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