Possible Tests for a Gear Pump Project?

If it's simply about replacing the material and assessing the durability then one simply applies the rebuilt pump in the same hydraulic situation as it was before it was rebuilt and see what happens. Why has the wetted material been changed - corrosion or erosion concerns (rhetorical question)? In industry, one wouldn't do this modification without reference to the original equipment manufacturer [OEM] as the OEM's warranty structure would become null-and-void as a result. Keeping the OEM on-board and involved with a change like this is part of a 2-way process, as the customer gets a pump that will do what is wanted and the OEM gets an additional application for which the pump, or a modified version of it, is suitable. Both are valuable, though in different ways.

You could test the suck/push ratio! sounds strange I know, but on another post we were talking about this! A pump pushes better than it can pull so you could use this to see if your pump has improved in this or not!

Test to see if it does what you designed it to do...!

If you didn't write a specification (or target spec) in the first place... welcome to the real world!

Define a 'typical' application, any test you do...do it with the standard gears and your new ones.

Start gentle and work up...eg don't start with a fine suspension of carborundum!

Since you are changing from Metal to plastics you need to verify chemical compatibility. I would suggest outlining all the chemicals you know the unit will be exposed and checking the material charts for compatibility. Once you determine this I would then perform soak tests in the materials.

Also are you changing the entire pump body as well as the gears? If you are only changing the gears then wear may be another issue. Plastics have a higher tolerance range, unless you have very good tooling. If the body also is being changed ensuring that the body can hold up to the environment is essential.

I would make sure that your pressure differentials do not change from one to another for the negative.

Life test of the new materials is important overall also. I would perform life testing on a representative sample in each material you used above.

What we do is create a Qualification test spec for each pump we make and test the pilot run to this test spec. There are many tests that can be performed, but mainly the listed tests are important. Any other tests should be based upon applications and markets.

Keep in mind it is much easier to look the fool in house than to the customer.

hola si es posible primeramente nesecitas cargar la bomba con aceite un sae 40.

despues determinar la potencia ala que la proyectaste esto puede ser un motor o moto reductor digamos de 0.5 hp a unas 500 rpm, procura purgar la bomba antes del arranque y sobre todo que la succion sea ahogada para no batallar con npsh, dependiendo de los ajustes de la bomba sera el vacio y la eficiencia volumetrica de la bomba despues del arranque deveras checar en recipiente los lpm, o´gpm, en un minuto lo que te dara el gasto y la presion la checaras en la descarga de la bomba con un manometro digamos de 0 - 150 psi y una valbula de gobo hasta cerrar completamente la valvula esa sera la presion de descarga que te dara la bomba

ok atte castell