Low-flow, high-head centrifugal pump
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Our factory needs several centrifugal pumps with a head of 120m and a flow rate of 3 m3/h, as well as corrosion-resistant properties (at least made of 304 material). However, I’ve been told that it’s very difficult to find such pumps. Do anyone have any good suggestions?
A multi-stage centrifugal pump can meet the requirements for this purpose, and the material used is also not an issue. The key is to find a professional pump manufacturer.
Low flow, high head – is a centrifugal pump really necessary? A reciprocating pump can be considered.
Most ordinary centrifugal pumps should work fine; the material is not an issue. You can find a sample to take a look at; if the power isn’t very high, considering backflow might be an option.
Vortex pumps work too; they are designed for high head and low flow rates
For such performance requirements, many types of pumps can be used, such as multi-stage centrifugal pumps, reciprocating pumps, and high-speed pumps; in my opinion, multi-stage centrifugal pumps are the most suitable choice. Centrifugal pumps have a low failure rate, are relatively durable, come at a moderate price, and are easy to operate and maintain.
Tangential flow pumps are used, and they are primarily applied in centrifugal pumps that require low flow rates but high head. Last edited by hcb081995 on 2009-2-12 08:46.]
Reciprocating pumps are relatively easy to meet your requirements, and they require less routine maintenance.
High-speed pumps are better; the impellers of multi-stage pumps are too small, the flow channels are narrow, and they are difficult to manufacture.
Of course, screw pumps and plunger pumps can also be chosen
This can’t really be considered a pump with low flow rate but high head either; the head isn’t very high and the flow rate is low, so it’s easy to choose
High-speed pumps, rotary shell pumps, and tangent pumps can be selected.
It is not necessary to choose a centrifugal pump; a rod pump could be considered instead.
Pump types such as screw pumps, reciprocating pumps, and gear pumps all have relatively high failure rates. As an operator, I really don’t recommend this; it’s probably just because it’s cheap. A backup machine can be considered. There are multi-stage centrifugal pumps with a flow rate of less than 3 cubic meters; stainless steel versions of such pumps should also exist, so you can look in that direction.
Depending on the circumstances, a vortex pump should be chosen; alternatively, a high-speed centrifugal pump equipped with an increase gear can also be used.
With such low flow rates, it is better to use a piston pump.
I recommend to LZ the imported GRISWOLD 811 LF series of ANSI centrifugal pumps, which are designed specifically for low flow rates and high head pressures. 1. Circular, concentric vortex-shaped casing made of 1.316SS stainless steel. 2. Radial impeller for low flow rates (a unique design; impellers for low flow rates need to provide better pressure control). Gülz also offers this series of products imported from abroad.
You can choose a jet pump; in China, institutions such as Sichuan Institute of Machinery and Beijing Zhongnong Academy are available, so you should be able to find one.