Problem with the on-site ammonia water pump
Thread Content
One of the ammonia water pumps on site has a very low flow rate when it is started up after major maintenance, and the outlet pressure does not increase. What could be the cause of this, and how can it be resolved? This pump was not touched during the maintenance; air release was carried out, and the sequence for starting the pump was verified to be correct. It was functioning normally before the maintenance, with an ammonia water concentration of around 10%, and the liquid level of ammonia water in the storage tank was also sufficient.
The poster is saying that the medium remains unchanged, the inlet vapor pressure head is maintained, and there is no pressure at the outlet. First, check whether there are any other abnormalities, and then examine the ammonia concentration and inlet temperature of the medium entering the system; sometimes abnormal temperatures can also be a problem. Then check the pipeline valves; we have encountered situations where the valve cores fell off. Don’t rush to disassemble the pump yet.
1. Ammonia solutions easily release ammonia gas; exhaust the air multiple times when starting the pump! 2. The inlet valve must be fully open! 3. When the pressure on the pressure gauge of the outlet pipe is greater than (the pump’s design pressure plus the inlet pressure), slowly open the outlet valve! If the flow exceeds the capacity, do not fully open the outlet valve!