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Artisi- thanks for the reply. The magnitude of wear measured in the PEEK vanes is negligible after 100 hrs of testing. The performance is satisfactory for the pump at his point of time with plenty of margin. At some point with the wear increasing the pumps performance will start to degrade, I...

Hi all- I am currently working on the development of a positive displacement sliding vane pump. The vanes in the pump are made up of PEEK. As part of the development testing, we have performed endurance testing on the pump and wear on the pump was calculated (wear was calculated by measuring the...

thank you george verghese and gruntguru

can sombody help me in deriving the formula( see attched) or suggest books where I could find the same. http://files.engineering.com/getfile.aspx?folder=490e3f90-b6bd-4f3d-baf9-d57ea2991e3d&file=valve_rename.pdf

The Temperature at which the nitriding was perfomed was at 420°C. the s-phase S-143 sample and the S-143 sample were mounted on a large impeller. after a thousands of hrs of testing the mass of the coupons were measured and found that the S-phase S-143 cavitated more than the ordinary s-143...

Hi All, I had recently performed S-phase nitride coating on S-143 precipation hardened steel to improve cavitation erosion properties of the material. however the the cavitation erosion property worsened after the s-phase nitride coating was performed, instead of improving it. I am confused...

please find second pagehttp://files.engineering.com/getfile.aspx?folder=057afcb2-c4fe-4a5c-953b-2b6e2d0588be&file=page2-2_(2).JPG

Hi all, I have been doing some calculation to select an air operated valve for one of the rigs i am working on. the pressure at the inlet of the valve is 44 psi. which is constant, however the outlet pressure needs to varied from 30 to 5 psi. this led me calculate the Fl required(the Fl...

Thank you.

Willard3 can you please provide a link

Hello people I need to calculate the thickness of insulation required for a cylinder of inner radius 20cm. The temperature inside the cylinder is -165°C and outside temperature being 25°C. similarly how does it vary for a wall of thickness 50cm. Do i need to provide any more information or...

thanks mike

Can any one of you please provide help in calculating the natural frequency of a spring loaded valve. The spring which has got a mass in its end(i.e poppet) weighs 40 gms.Rate of the spring is 0.20 N/mm. the installed lenght of the spring is 40mm. the free lenght is 49mm. The way i see it , is...

Little Inch, to provide you with some more information: The application is used for a jet pump performance test. We have a jet pump placed in a pressurisd tank which is provided with a motive flow. The motive flow is provided from a different tank. since it is a performance test we use...

Hi guys, Could some body help me out with a smart way to maintain fluid level in 500Gallon capacity tank. the fluid will be bled out contimously for various purposes, so the system needs to replenish the the fuel level and ensure the fuel level never reduces. I was thinking about using a...

[smile2][smile2]Little inch, Artisi---sorted the problem.. thank you guys for the advice MikeHalloran---I have passed on ur message.

Hi All, setup: I have two centrifugal pumps, pumping against each other. The pumps are placed in separate tanks which contains water. The two pumps are connected to each other using a flexible pipe. There are non return valves sitting outside both the pumps, which ensures that neither of the...

how to calculate the output power of a dead head pump; since we donot have a flow at dead head condition and the head is maximum. I do have the input power which is close to 2.7KW. what considerations of the loss should i take(is it the impeller losses and the motor losses along with the LRP)...