The Rivaa double-diaphragm metering pump does not deliver flow
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The pump doesn’t deliver sufficient flow – how to add oil in between the diaphragms, how to determine whether enough oil has been added, what the operation is like when insufficient oil is present, and how much oil should be added. What are the reasons for the low volume? Urgent help needed. . .
If you’re really in a hurry, I’ll give you a number: 13478722049 (Manager Zhao from Dalian Rivva Company). Just say the contact information you found online.
Open the inlet and outlet valves to check if they are blocked, and also see if the diaphragm is damaged. Another possibility is that there is gas in the system
1. Check whether liquid is coming out of the pump’s inlet and outlet valves to confirm that there is no gas in the system. 2. Check whether the inlet pressure is sufficient to push the liquid into the pump’s inlet. 3. Before starting the pump, close the pump’s outlet valve and operate the equipment in jog mode to check whether there is pressure on the outlet pressure gauge; if there is pressure, it indicates that the pump is functioning properly. 4. Check whether the hydraulic oil contains impurities or is emulsified; if so, replace the hydraulic oil. 5. Open the hydraulic oil tank cover, manually rotate the crank to check whether the hydraulic oil fill valve and breather valve can function properly for filling and draining oil
Are you asking about filling oil into the hydraulic chamber, or filling oil between the two diaphragms? It’s difficult to repair between the two diaphragms; generally, creating a vacuum is sufficient. I’m not sure what a metering pump looks like; does it have a manual oil filling valve?
Check whether the oil filler valve and check valve are stuck
Our unit hasn’t been tested recently; we checked that the check valve is in good condition and that the diaphragm is intact. After replacing the piston rings, we conducted another test, but it still doesn’t perform as well as the other pump. How can I check the oil refill valve?
Remove the safety valve, add oil at the safety valve hole, and turn the pump while doing so until no bubbles more appear – at that point the air inside the pump has been essentially removed
There is an oil replenishment valve below the pump head; try pressing it firmly while the pump is running. If it does not rebound strongly, it indicates that the oil replenishment is not smooth; if it rebounds strongly, then the oil replenishment is working properly
Are you using Rivaa’s M500 pump head or the M910 pump head? The two pumps have completely different designs