Recent content by duika

Hello, For sizing a relief valve (surge anticipator) in a water supply pipeline i am using the next formulae: Q = 2 x g x H / a x v where Q = flow to discharge g = gravity H = normal head a = celerity v = velocity of the flow Depending the value of Q and knowing the Cv of the valve, i...

a sustaining valve only remains constant the pressure upstream but not equal the pressure upstream and downstream.

hi f1 i think that you must choose the valve with higher Cv of the market, because the fluid always is going to have head loss in the valve.

i am looking a basket strainer for a project with clean water, with minimum head loss for a DN1300 pipe. Any suggestion of manufacturers?? Thanks in advance.

you can see the GA valves, Golden Anderson Valves, globe type, piston and V ports. www.gaindustries.com/

Hi guys, I would like to calculate the loss of head in a 20" foot valve for a velocity of the fluid (water) about 1.2 m/s. The most important factor are the losses in the screen retainer (i suposse), so should be interesting to know any kind of chart for calculate the losses depending the...

I´m looking information about some studies of vibration of hydraulic structures made by KOLKMAN, P A, edited by Elsevier Publishers in 1984. I think that Delf Laboratories worked with this man some yeras ago. Where can i get books of this author?

TD2K Thank you for your comments. i think your figures are ok. in order to prevent the vaccum forming we are to project an air valve of 12".

Dlandissr: The information we have in this moment is: The main pipe size: 40 " Length: 580 m Elevation difference: 82 m Fluid density and viscocity: water 20ºC Type of valve: globe Drain pipe size: the same of the valve we choose Do you think we can drain the pipeline in less of 1 hour?

i need to calculate the size of the draining valves for a pipeline. can anybody help with formulae?? usually we project a size of 8 inches but i want to check the criteria of this value.

hosec with the crane paper, the flow to regulate and the drop pressure, you can get the inside diameter of the orifice plat for these variables