SPI Supplies
30
SPI-DRY Critical Point Dryer
(d)
Re-assemble in reverse order.
7.1.8
Safety Valve Assembly
(a) To replace the Bursting Disc in the Safety Valve, unscrew and separate the pressure vessel from
the stand pillar by rotating the pressure vessel counter clockwise relative to the base.
(b) Unscrew and remove the top of the Safety Valve using an appropriate size wrench.
(c) Remove and discard the Copper Ring and ruptured Bursting Disc from the Safety Valve body.
(d) Fit a replacement Bursting Disc and Copper Ring.
(e) Re-assemble in reverse order.
Figure 7.3: Safety Valve Assembly
7.2
Troubleshooting
We hope that you experience the minimum of problems throughout the lifespan of the instrument
but inevitably problems may occur. Any known problems associated with this type of instrument
have been listed below with the possible cause and suggestions to what to do. If problems
continue to occur, contact the Customer Service Department at SPI Supplies or your local agent.
OBSERVATION
POSSIBLE CAUSE
REMEDY
Chamber will not fill
completely
Insufficient cylinder gas
Replace gas cylinder
Chamber will not fill
completely
Chamber temperature too high or
gas cylinder temperature too low.
Allow longer pre-cooling time
Chamber will not reach
critical pressure
Leaking gas connections,
damaged door “O” ring gasket
Check and retighten connections as
required,
Replace damaged seals or gaskets as
required
