Selection of pumps
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I have a question for everyone: what is the flow rate, 2 cubic meters per hour?； Head 240 meters ； Medium: dilute ammonia solution. Which pump is suitable? If possible, please recommend manufacturers, especially for centrifugal pumps that are single-stage or multi-stage and use mechanical seals.
It is recommended to use Dalian Sulzer; it’s a bit more expensive, but it’s a well-known brand, durable, and requires no maintenance
With such low flow rates, it is recommended to use high-speed tangent pumps; those produced by Beijing Institute 11 should be a good choice
High-speed pumps are too expensive; in China it’s the 11th Aerospace Research Institute, and abroad it’s Sundyne in the United States. It is recommended to use multi-stage pumps, such as those from Sulzer in Dalian or Deep Blue in Dalian.
For low flow rates and high head, a multi-stage centrifugal pump may need to be chosen.
The imported pumps that our company represents can meet your requirements – they are miniature multi-stage pumps with low flow rates but high head. If you are interested, please send an email to: jouleguo@126.com
Multi-stage pumps: Beijing Aerospace Institute No. 11, Dalian Jiaming, and the foreign brand Sundyne
I recommend using pumps from Hangzhou Alkali Pump Factory, a high-quality domestic manufacturer.
It is relatively difficult to choose a centrifugal pump with low flow rate but high head. If no suitable pump can be found, multi-stage boiler feed pumps can be considered; for ammonia, carbon steel materials can be used. A boiler feed pump with around 10 stages can generally meet these requirements in terms of pressure, and there are also models with low flow rates. Mechanical seals can be specified for the shaft seals.