Parr Instrument Series 4558 - Manual (Page 9)

4555 - 58 Series
5G & 10L Pressure Reactors
- 8 -
INSTALLATION
Pressure and Temperature Limits
The working pressure and temperature at which any reactor or pressure vessel can be
used will depend upon the design of the vessel and the materials used in its construction.
Since all materials lose strength at elevated temperatures, any pressure rating must be
stated in terms of the temperature at which it applies. The standard material of construction
for Parr Instrument Company is Type 316 Stainless Steel.
Limits for vessels made of other materials and for other operating temperatures can be
obtained from Customer Service. No attempt should be made to increase these limits by
making alterations or by substituting components which are not recommended by the Parr
Instrument Company. It must also be understood that lower pressure and temperature limits
may be required for modified reactors and for vessels made of special alloys.
Limits for vessels will be determined by the physical characteristics of the vessel material
and will be prescribed on an individual basis.
Temperature and pressure limits are also affected by the physical properties and
temperature limits of the gaskets and seals used in the vessel, and by any valves, gages or
other fittings attached to the vessel. Obviously, the safe operating pressure of any system
can be no higher than that of its lowest rated component.
All Parr reactors show the maximum safe operating pressure and temperature imprinted
on the cylinder.
The working pressure and temperature in these five gallon and ten liter reactors must not
exceed the following maximum limits:
Pressure and Temperature Limits
Vessel Material Maximum Pressure Maximum
Temperature
T316SS 1900 psig 350° C PTFE Flat Gasket
T316SS 1900 psig 225° C FKM O-ring
T316SS 1900 psig 275° C FFKM O-ring
A1761HC3 400/415V 3-Phase "Y" Slave Box Control
Installation of a 3-phase slave box requires a switch or circuit breaker installed in the
building.
1. It shall be in close proximity to equipment and within easy reach of the operator.
2. It shall be marked as disconnecting device for the equipment.