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A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps.Pumps operate by some mechanism (typically reciprocating or rotary), and consume energy to perform mechanical work moving the fluid. Pumps operate via many energy sources, including manual operation, electricity, engines, or wind power, and come in many sizes, from microscopic for use in medical applications, to large industrial pumps.
Mechanical pumps serve in a wide range of applications such as pumping water from wells, aquarium filtering, pond filtering and aeration, in the car industry for water-cooling and fuel injection, in the energy industry for pumping oil and natural gas or for operating cooling towers and other components of heating, ventilation and air conditioning systems. In the medical industry, pumps are used for biochemical processes in developing and manufacturing medicine, and as artificial replacements for body parts, in particular the artificial heart and penile prosthesis.
When a casing contains only one revolving impeller, it is called a single-stage pump. When a casing contains two or more revolving impellers, it is called a double- or multi-stage pump.
In biology, many different types of chemical and biomechanical pumps have evolved; biomimicry is sometimes used in developing new types of mechanical pumps.

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  1. M

    Heat pump unvented install balanced cold

    If changing a combi boiler system to a heat pump. What do they usually do with the balanced cold connection on the hot water cylinder? Cap it. And put a pressure reducer on the mains so they have equal hot and cold pressures? I can't see them repiping a balanced cold from the cylinder to each...
  2. P

    Shower, boost pump making strange noise

    My Duraspeed pump has started to make a strange noise when water is drawn but I can't see where to add a video. It was already installed when we moved in last year and may have given up the ghost after battling with an air lock in the system? Any help would be gratefully received.
  3. S

    whats a more powerful pump then a grundfos ups 25-50 130

    Hi i have a grundfos pump 25-50 130 p/n 59525418 radiators downstairs are cold and upstairs hot after an 1-hr 2 hrs then the downstairs gets hot i think the pump i have is too weak would would be a more powerful pump to help with this ? thanks
  4. L

    UFH + heat pump - is it connected correctly?

    Hi, we had UFH installed dowstairs in our house recently, and I'm not 100% sure that it's connected correctly. I'd be grateful if someone could have a look at the diagrams and tell me if what the plumber did makes sense. The house is heated with an A2W Samsung/Joule heatpump. The buffer...
  5. pinkman

    Are pump types interchangeable?

    Hi there good people. I have a small issue, I've incorrectly connected a connecter on the PCB of my old boiler back to front, and seem to have broken my pump, since learning my mistake I have put it the right way, it is drawing out about half the current it should. To keep a long story short...
  6. F

    Advice on pump settings

    Hi All, Fitted a willow Yonos Pico pump 25-1-6-130 after the advice on here. What I'm confused about is the pump needs to be set for head at either. 1-4 mtrs or 1-6 mtrs (see below attachment) my system has 8 radiator's and is a closed pressurised system. I worried if I pick wrong setting I'll...
  7. F

    Heating pump recommend

    Hi All, Pump gone on my parents heating system it's a Grundfos 15 60 130. New one best part of £300 is there any other makes you guys would recommend? Thanks
  8. J

    Pump running but no power to boiler

    On a breakdown which is stumping me. The boiler has no power to it even though everything else in the system is working as it should. The 3 way moves across when it should and kicks in the pump but there is no power on the wire entering the boiler.
  9. T

    Monsoon twin pump installation - wrong pump?

    My house was a bungalow that was extended up into the roof, and a bathroom installed up there. The hot water cylinder remains on the ground floor. The mains water pressure is low. A Stuart Monsoon U3 dual pump was installed to pump both hot and cold. I am thinking that this is the wrong type of...
  10. R

    Can anybody advise me on the dissassembly of a Grunfos Magna1 pump ?

    Hello, I have a Grunfos Magna 1 40-120 F pump which starts making a nasty noise after some time running. I would like the dismantle the impellor area of the pump to inspect the bearing surfaces of the rotor. However, I can't seem to see the way to extract it from the pump head. Can anybody...
  11. J

    Pipe size for heat pump system

    I am sizing the central heating pipes for a complete replacement. The property has an elongated floor plan so I have used a piping layout consisting of single flow and return headers running the length of the property and take-offs to and from radiators. Currently there is a combi boiler...
  12. J

    Help me understand this pump curve

    This pump curve is from a combi boiler with an internal automatic bypass valve. Why is the maximum flow obtained with the bypass valve in the middle position? Shouldn't a fully closed bypass valve result in a higher flow through the main circuit? Also, any idea what 'V1' and 'V2' mean (no...
  13. C

    what is this part called ? reillo g3b oil pump

    got new oil and tried to start my reillo g3b oil burner ,when it idnt fire and went to lockout i bleed the pump and check the nozzle ,and eventually took apart the pump to find lots of black oil slug around the oil pump.so i cleaned all the stuff of and cleaned through the pump and the only...
  14. Sparkgap

    What's better than one pump?

    Went to a small hotel we put new boilers and cylinder in last year as they were complaining about no hot water and heating on the top floor. I should add that's all we did as I thought the existing systems needed total ripping out and starting again but they didn't want to spend the money. Hot...
  15. P

    Air-to-Air or only Air-to-Water Heat Pump?

    In my new high efficiency house, I will have UFH with an Air to Water (A2W). Heat pump Monobloc, but for extra cooling on hot days I think extra air cooling with FCUs is needed: Should I use a secondary Air (to coolant) to Air system, or stick with just the Air to Water system to also drive my...
  16. R

    How do I stop Air being sucked into pump of Vaillant heat only boiler?

    Vaillant ecoTEC Plus 400 15kW Heat Only Boiler I've got air in the pump and one gas engineer has said I need to move the pipes as they are configured incorrectly. Another said all I need to do is add an AAV as high as possible. Another said I should seal the system. Boiler was installed in...
  17. S

    Grundfos ups3 pump issue

    Ups pump issue Fairly recently, say 12 months ago, we had a new pump fitted. It's a grundfos ups3 15- 50/65 130. (We have a small expansion tank next to the large tank in the loft. So not a sealed system) After it runs normally for several hours it just stops working. The radiators obviously...
  18. D

    Fuel pump voltage at 80volts

    Hi, just fitted a new fuel pump and control unit to my ecotherm boiler but I still can’t get any fuel to the top of the pump, nothing coming out of the bleed screw but definitely fuel in the bottom of the pump. I checked the voltage to the pump and it’s only 80volts but there is 240volts going...
  19. Nicjones

    Riello 2.2 rgb oil burner won’t start

    Hello all Our riello burner intermittently won’t ignite. However for some reason when you tap gently the oil pump it lights every time. Any help appreciated. Thank you
  20. B

    How to properly plum a utility sink with pump in basement?

    I just purchased a home and I would like to install a utility sink in the basement with a pump. Below is a pic of the room in the basement. The sink would go under the window. I have a pic of a diagram of the plumbing I would like to install. I am just a beginner and do not have much experience...
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