【Q&A】April 20, 2017
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Question: What is the relationship between the flow rate and head of a centrifugal pump? Answer: The head (pressure rise) of a centrifugal pump decreases as the flow rate increases over a wide range of flow rates. http://bbs.hcbbs.com/static/image/hrline/4.gif Petrochemical Zone—New Ideas for Energy Saving: The “Creative Thinking” Campaign (Sponsors sought; highest returns ever offered) http://bbs.hcbbs.com/thread-1666758-1-1.html Sponsors are being sought for this campaign; those interested can contact the event organizer. The Petrochemical Processing Edition—sharing pictures of chemical equipment has begun! A vast amount of wealth, as well as Haichuan coins, are waiting for you to claim them: http://bbs.hcbbs.com/thread-1760733-1-1.html. “Petroleum and Chemicals Section”: Notice regarding the collection of chemical industry-related technical materials: http://bbs.hcbbs.com/thread-1614796-1-1.html. http://bbs.hcbbs.com/hcdown/data/attachment/forum/201704/07/123053embbjkok61hz6vvz.jpg.thumb.jpg. [Haixin Chemical Cup ★ Spring has arrived for Haichuan Chemicals] Summary post of the 2017 scenery-sharing event (you can take a look at the local scenery posted by users from various places in your free time): http://bbs.hcbbs.com/thread-1766484-1-1.html
N=γQH/1000η, γ is the specific gravity of the liquid, in N/m³； η-efficiency ； N – Power, kW; H – Head, meters ； Q - volumetric flow rate, cubic meters per second
With power fixed, within the range of the curve, flow rate is inversely proportional to head
The head (pressure rise) of a centrifugal pump decreases as the flow rate increases over a wide range of flow rates.
The head of a centrifugal pump decreases as the flow rate increases over a wide range of flow rates.
For each water pump, at a certain speed, there is a curve showing pressure and flow rate; when the system resistance decreases, the corresponding flow rate increases. There is a range within which the pump’s efficiency is highest (within that flow rate range). For different applications, there are many models of pumps to choose from. There are water pumps with low pressure and high flow rate.