PRIMARY SHUT OFF (PSO)
The PSO is the first line of defence against product contamination and debris entering the vacuum pump. Some product debris by-pass will occur during day to day operation. This is normal and the reason a Secondary Shut Off (SSO) is fitted in line with the vacuum system.
The PSO will work when the product level within the tank reaches such a level that the rubber float ball is pulled up to the seat by the pumps suction.
- Check the ball for any product build up that will accumulate over time. It is recommended that the primary shut off ball be checked regularly.
- Clean the ball with a solvent cleaner and check for any imperfections – replace if necessary.
- Check the rubber seat for any signs of deterioration or debris – clean if necessary.
SECONDARY SHUT OFF (SSO)
The SSO is the second line of defence against product contamination and debris entering the vacuum pump.
The SSO will work when the product level within the body reaches such a level that the rubber float ball is pulled up to the seat by the pumps suction. The SSO must only be used as a back up shut off and should not fill under normal operation. If the secondary is continually filling during normal operation, cut off vacuum system and inspect primary shut off.
- Check the ball for any product build up that will accumulate over time. It is recommended that the secondary shut off ball be checked regularly.
- Clean the ball with a solvent cleaner and check for any imperfections – replace if necessary.
- Check the rubber seat for any signs of deterioration or debris – clean if necessary.
- The Secondary Shut Off (SSO) requires daily draining.
(Ensure the pump is disengaged and the vacuum tank neutralized before operating drain valve or removing sight bowl.)
