SPI Critical Point Drying Apparatus
Detailed Description of the Apparatus and Service Information: Complete assembly
Introduction
The SPI Critical Point Drying Apparatus is a purely mechanical assembly. With the
exception of the glass viewing window, pressure seals and gauges, it is
constructed entirely from metal parts.
The construction of the apparatus is not complex and if it is found necessary to
completely strip the unit for cleaning purposes, this operation could be carried
out by any competent mechanical technician. It must be pointed out, however, that
if any pressure seal is disturbed, care must be exercised
in the reassembly and testing of the seal . One is dealing with pressures in the
range of 800 to 1200 psi which are potentially dangerous if handled carelessly.
Before delivery to the customer, the equipment undergoes the following tests:
- On completion the unit is tested by an independent
laboratory using a hydraulic pressure of 2500 psi. Testing is done to the
standard required for C-E Certification.
- The unit is then stripped and cleaned to remove traces of
water.
- It is then tested to 2000 psi using carbon dioxide. The
safety valve is set to 1800 psi.
- Following this procedure ensures that there are no defects in workmanship or
weaknesses in any of the mechanical parts.
The Complete Assembly
The apparatus comprises the following parts:
- Pressure vessel assembly with integral water jacket
endplates (2), window assembly, specimen door, water
connectors (2)
- Control valves (3)
- Thermometer
- Pressure gauge
- Safety valve
- Baseplate
- Specimen holder assembly
- Transfer pipe
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Friday September 05, 2008
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