SciCan Statim 2000 - Checking the Pressure Relief Valve; Removing and Replacing the Pressure Relief Valve

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STAT IM 2000/2000S Service Guide
96-108639 Rev 3.0
11. Steam Generator, Check Valve, Thermal Fuse and Pressure Relief Valve
STATIM 2000/2000S/2000 G4 Service Guide
The function of the PRV is to protect the STATIM unit by allowing steam to vent to atmosphere in
the event of an overpressure situation NOT detected by the software.
Important: This device is a safety critical item. The checking and replacing of the device may
be subject to various pressure regulations in some countries.
It is recommended that you familiarize yourself with the local regulations with regard to
pressure systems before attempting to check/replace the PRV.
In the event of a requirement to change the PRV, always replace like with like as the unit will
have been designed and validated for that specific PRV.
Checking the Pressure Relief Valve
Caution: checking of the PRV under running conditions should only be undertaken by visual
means. Manually activating the PRV should not be undertaken under any circumstances other
than by authorised pressure vessel testing engineers.
To perform this test, the STATIM unit must be running with the cover off and the control box
attached as if running as test cycle during servicing. For revision 7.x units the unit can be run with
the cover removed but still connected to the controller.
To check the PRV, proceed as follows:
1. Start a normal cycle on the unit and wait for the unit to reach sterilization temperature and
pressure.
2. Using a reflective, cold surface (e.g. a dental mirror), place it close to the PRV and observe for
condensation.
3. If condensation is apparent when the unit is at optimum operating pressure then the PRV has
failed and should be replaced.
Important: Checking of the upper limit of the PRV can only be done with the PRV removed
from the steam generator and should only be undertaken in accordance with local regulations
and by an authorized pressure vessel testing engineer.
Removing and Replacing the Pressure Relief Valve
To remove the PRV, proceed as follows:
The unit should be OFF, with the mains cable removed from the socket and the cassette removed
from the armature. No pressure or power should be present while performing this operation.
The cover should also be removed.
It is also recommended that the steam generator and associated components are cool to the
touch before proceeding.