It’s a great pump . Performs well and super reliable. I have a few of them for different things. Some almost 10 years old
Most claim they can handle 125psi this may be possible with new diaphragms for a short period of time. I run mine at 80-90 psi. Typically last a few hundred roofs this way . At 100 psi they last 50 roofs sometimes less
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Here’s a good video on how air diaphragm pumps work.
I think the design would be difficult to implement with a non-compressible liquid.
I believe the sump pumps sold by pressuretek and other suppliers use a venturii vacuum as @SchertzServicesLLC mentioned. They rely on having practically zero back-pressure on the discharge hose in order to achieve their impressive “draw” rates.
That said, I’m fascinated with the idea of a pressure washer-driven chemical application pump.
I’m not sayin hook up a pressure washer to a air pump… I just mean there’s got to be a way to have a pump similar to air but that works off of pressure.
Or even better would be a SH resistant pumpmthat works off hydraulics, in that case a lot of people would switch over to hydraulic drive pressure pumps, which are better then gear or belt drive.
Idk, just seems crazy to me to take up a huge part of your footprint with an a gas air compressor. There has got to be a way to utilize one engine for everything,
I get fascinated when I look at the technology in the carpet cleaning industry, They are way ahead of us
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Seriously. I love the PTO-driven truck mounts they’ve got. HP galore. No dealing with small engines inside/on the rig. No gas tanks to deal with. Heat exchanger running off the engine coolant for hot water. They just make a ton of sense to me.
I see more of what you are saying. So you would just use a QC to plug into the air=(water) inlet on a diaphragm pump and have an air (water)“output” line coming off the diaphragm pump running back to the buffer tank. So the PW is never really building pressure but using the volume of water to move the pump?
The water from your PW is not actually interacting with the chemical going through the secondary pump. Just moving the pump.
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