Issue link: http://psai.uberflip.com/i/1293694
ASSOCIATIONINSIGHT Portable Sanitation Association International News BIWEEKLY EDITION SEPTEMBER 30, 2020 Page 3 Maintaining Pumps and Troubleshooting Issues…continued from page 1 Continued on page 4 Follow a Regular Maintenance Program To keep the pump in working condition, operators should conduct regular maintenance and keep a written log of those checks. • Before Starting the Pump: » Ensure a vacuum relief valve and a pressure relief valve are installed in the system and adjusted to recommended settings, taking into account the altitude of the job location. » Always bleed the tank to atmospheric pressure before switching the valve from vacuum to pressure or from pressure to vacuum. • Every Load: » Drain the scrubber after each tank load. If nothing drains when the ball valve is opened, never assume it is empty. Check for a valve blockage. » Check the oil level in the oil reservoir and fill as required. » Monitor vacuum/pressure and temperature gauges to detect any irregularities or problems. • Daily: » Add oil approximately every 10 hours of operation or when the oil reservoir shows the level is low. Only use approved lubricants. » Drain the oil separator twice daily. A brass ball valve is mounted at the bottom for easy draining. » The oil catch muffler must be drained when it runs for a long period of time (approximately 2 hours). Excessive use will cause oil to accumulate within the muffler. Follow this procedure to avoid having oil blown through the muffler and onto the ground. » The secondary shut-off should be drained after every use to avoid accumulation. • Weekly: » Flush the pump weekly with flushing fluid, or any time liquids or solids have been allowed to enter the pump. » Check and clean the inlet filter. Ensure the filter is completely dry before refitting. This checking process must be done any time contamination may have entered the system. » Check to ensure the pump RPM is within the recommended range. Running the pump too fast or too slow may cause damage. » Wash any dirt off the pump as it needs to be clean to allow heat to radiate and prevent it from overheating. • Annually: » Check bolt mountings, drive coupling alignment and condition, and vane wear. • Storage: » If the pump is to be sitting for an extended period of time it needs to be flushed prior to storage. Common PRV Components