How to increase pressure in a system

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Discussion Overview

The discussion revolves around methods to increase pressure in a testing system for high-pressure water pumps. Participants explore various approaches to achieve specific flow rates at designated pressures, focusing on practical solutions and equipment options.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • One participant seeks advice on increasing pressure to achieve a flow rate of 250 gpm at 7 bar, expressing uncertainty about available methods.
  • Another participant suggests using a variable frequency drive pump to adjust pressure and flow rate, referencing Bernoulli's principle to explain the relationship between pressure and flow in a system.
  • A different participant questions the applicability of a frequency drive for their testing needs, emphasizing the goal of assessing pump performance under specific conditions.
  • Another suggestion involves using a back pressure regulator on the pump's outlet to measure flow rate downstream, proposing a specific configuration for the system.

Areas of Agreement / Disagreement

Participants present multiple competing views on how to effectively increase pressure and measure flow, with no consensus reached on the best approach.

Contextual Notes

Participants do not clarify the specific limitations of their proposed methods, such as the assumptions regarding system design or the characteristics of the pumps and regulators mentioned.

Who May Find This Useful

Individuals involved in pump testing, fluid dynamics, or those seeking practical solutions for pressure and flow measurement in hydraulic systems may find this discussion relevant.

yaljared
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I want to make a testing system to test a high pressure water pumps. I need to know how much is the flow in a certain pressure. I bought a flow meter to measure the flow but I couldn't simulate the pressure I need. I DON'T know if there is a kind of valve that can increase the pressure to make the pump (for example) give 250 gpm at 7 bar

who can help me on this?
 
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A variable frequency drive pump can easily be used to change the pressure and flow rate if u wish , but unfortunately this kind of pump is very expensive , though there is always a relationship between pressure and flow rate in any system using bernoulli energy balance where static pressure , velocity "dynamic pressure" and potential energy are balanced between 2 points through the system , using a diffuser somewhere in the system will decrease your velocity and increase your pressure.
 
Thank you Firava.
But I don't think the frequency drive will help me. I want to test the performance of the pump I assemble.Wether it gives the required flow under a certain pressure.

Thanks
 
Can't you simply put a back pressure regulator on the outlet of your pump and measure flow rate downstream of that?

Example:
Inlet -> Pump -> Pressure Gage -> Back pressure regulator (& relief valve) -> Flow measurement at Patm.
 

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