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STOLISMA
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Location: BIRMINGHAM, ALABAMA, USA
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Figuring Flow Liquid

01/07/2010 3:36 PM

Hello All, Newby, am I in the right spot?

I am prototyping a faucet and need some help in figuring pressure loss through a hole in a piston so that i can determine pressures for springs, piston diameters etc.

Anyone smart in that department??

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Anonymous Poster
#1

Re: Figuring Flow Liquid

01/07/2010 4:26 PM

Tell us bot your hole. We may then be able to help.
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STOLISMA
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#2
In reply to #1

Re: Figuring Flow Liquid

01/07/2010 4:33 PM

prototyping kitchen faucet.

this is first run for principal and sizing.

3" od extruded acrylic tube...

2.75" piston with two orings.

penetration through the piston is variable, drawing it now.

water pressure will be appr. 70 psi.

spring to overcome is 2" od with rate of approx. 40#, 9.25" or 8" free, 4" stroke

questions?

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nick name
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#3
In reply to #2

Re: Figuring Flow Liquid

01/07/2010 5:47 PM

Make a sketch so that your request is best understood.
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STOLISMA
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#4
In reply to #3

Re: Figuring Flow Liquid

01/07/2010 6:33 PM

Is it possible to attach a pdf or jpeg on a thread?

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Kaisan
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#5
In reply to #4

Re: Figuring Flow Liquid

01/07/2010 10:52 PM

Use the little green camera.

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STOLISMA
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#6
In reply to #5

Re: Figuring Flow Liquid

01/07/2010 11:13 PM

Server wont accept a pdf. i will resave tomorrow as different file type. please check back!

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PWSlack
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#7
In reply to #6

Re: Figuring Flow Liquid

01/08/2010 3:30 AM

Convert it to .jpg; no problem.

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Hendrik
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#8

Re: Figuring Flow Liquid

01/08/2010 7:15 AM

Hi Stolisma

I am trying to visualize the faucet. Is it something like the valve in a trumpet sliding up and down in a sleeve or like a ball valve turning from side to side?

Any way I am on my once in a blue moon holiday at the seaside (southern hemisphere) and may not be of much help.

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STOLISMA
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#9
In reply to #8

Re: Figuring Flow Liquid

01/08/2010 12:04 PM

Sounds fabulous! We are having snow in Alabama, southern u.s..

If you have your brain with you, you are well equipped. i have read several of your posts.

having trouble converting pdf to jpeg in order to upload. if you want to send me your email, i can shoot it to you.

essentially, it is a single acting hydraulic cylinder with spring return.

i am doing the prototype in plastics (easy machining).

the pressure comes from the on/off mixing valve into the bottom of the cylinder. the piston has two o rings. in the center of the piston, i will have a hole into which i will tap a tube. the tube runs up through the top cap of the cylinder with another o ring and turn out to become the faucet head. there is a compression spring surrounding this tube for the return stroke.

my question is this, what size tube should i use to come up through the piston. i need to know how much pressure drop there will be. i want to be able to overcome the compression spring easily and at varying flow. i have order two springs of varying rate in order to test.

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nick name
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#10
In reply to #9

Re: Figuring Flow Liquid

01/09/2010 3:56 AM

It is very simple :

- you make a hand sketch scan it and send the jpg file you get from the scanner if you asked for a jpg format

- you print the pdf and proceed as above

You depress the camera button and submit the jpg file.
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STOLISMA
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#11
In reply to #10

Re: Figuring Flow Liquid

01/09/2010 1:55 PM

ALL,

I HAD NOT BEEN NEAR THE CAPABILITY OF SCANNING THE DOCUMENT.

HERE IT IS.

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 My dad always said "Son, if ya aint got what ya gotta have, ya gotta improvise"
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STOLISMA
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Location: BIRMINGHAM, ALABAMA, USA
Posts: 98
#12
In reply to #11

Re: Figuring Flow Liquid

01/09/2010 1:58 PM

ANYONE KNOW WHAT CR4 STANDS FOR??

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Users who posted comments:

Anonymous Poster (1); Hendrik (1); Kaisan (1); nick name (2); PWSlack (1); STOLISMA (6)

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