Parr Instrument 5400 - Manual (Page 9)

5400 Tubular Reactor System
w w w . p a r r i n s t . c o m 9
For many Series 5400 Tubular Reactor Systems, the
advanced controls provided by the 4871 Process
Controller are preferred. The 4871 controller can
monitor the temperature of each heated zone and
control the temperature of each zone independently
or by maintaining the outer temperatures based
on the internal temperatures. The 4871 Process
Controller is connected to either a number of 4875
Power Controllers or a single 4876 Power Controller
in order to provide power to each heated zone. Fur-
thermore, the 4871 can be connected to a 4877 Valve
Controller to open/close up to twelve automated
valves. The control of the gas feeds, liquid feeds,
temperature and pressure can be maintained from
a single source and are configured as each system
requires. The 4871 Process Controller is capable
of performing a number of functions in the event
of any of the configured alarm conditions have
become active. The 4871 Process Controller (along
with the SpecView graphical user interface) is also
capable of logging data and creating custom reports
of any of the logged data points. The 4871 Process
Controller manual as well as the information located
in the custom CD distributed with each 4871 Pro-
cess Controller should be referenced for additional
information.
Refer to the appropriate controller operating
instructions for specific installation and
maintenance instructions.
Vessel Head Fittings
Safety Rupture Disc
There is a safety rupture disc attached to the gas
inlet that is intended to rupture and release the pres-
sure before it reaches a dangerous level. A metal tag
wired to the safety head identifies the burst pres-
sure at room temperature for that particular disc.
A similar tag is furnished with each replacement
disc. This tag must remain with the apparatus at all
times so that both present and future operators will
be aware of the disc rating. Users should read the
discussion of rupture discs given in the Instruction
Sheet No. 231M for a complete description of the
characteristics of rupture discs and the precautions
to be observed when operating pressure equipment
protected by this type of safety device.
A typical pre-bulged disc can be used to 90% of the
rating on the tag. For additional protection, the user
should install an adequate and safe venting system
for removing any toxic, flammable or volatile mate-
rial which would be released if the rupture disc
should burst. A connector for attaching 3/8” OD
tubing to the discharge port of the rupture disc is
provided for this purpose.
Type J Thermocouple
A Type J thermocouple in a stainless steel sheath is
furnished with the reactor. Insert this thermocouple
into the thermowell and connect it to the thermo-
couple socket on the rear panel of the temperature
controller using the extension wire furnished with
the reactor.
Pressure Gage
The pressure gage furnished with this system has
a T316 Stainless Steel Bourdon tube. Gages are
furnished in a variety of ranges to meet individual
needs. Typically, the gage and the rupture disc are
furnished as matched ranges. For applications
where a gage is selected with a range under 1000
psi, a relief valve is added and set to protect the
gage. A 1000 psi rupture disc is installed as the fail-
safe vessel protection.
Spare Parts Kit
Parr can furnish spare parts kits for these systems
which will provide a reserve supply of parts and
tools sufficient to handle most normal replacements
and emergency repairs during a year of heavy
usage.
These kits contain replacement gaskets, packing, O-
rings, and rupture discs. They can be ordered from
any Parr Dealer or direct from the Parr Instrument
Company. The order must specify the reactor size
and indicate type of rupture disc. Always provide
the reactor serial number (stamped on head and
cylinder) to assure receipt of proper replacement
parts.