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How do I model QEV + Slide Valve system in GGDT?

Posted: Mon Dec 31, 2012 4:28 am
by Binary Blue
I'm still trying to plan my multi-shot pneumatic and need a little help in GGDT.

I need to model the QEV + Slide Valve assembly.

Currently, I'm using settings based on JSR's post here:
http://www.spudfiles.com/forums/viewtop ... tml#358482

I'm not even sure it's correct though.

Here's the data for both the valves:
QEV:
http://www.chinapropneumatic.com/produc ... 12222.html
I'm using the QE-02 (1/4 inch) valve.

Slide Valve:
http://www.cn-lida.com/products/KS-Shuttle-valve.html
I'm using the HSV-08 (1/4 inch) valve.

My GGDT settings are attached. Can someone please tell me what to do in order to model a QEV + slide valve set up?

Posted: Mon Dec 31, 2012 6:11 am
by jackssmirkingrevenge
Hard to get an exact model without the actual valve disassembled in front of you which you can measure and weigh. My figures should provide a good approximation though.

Posted: Mon Dec 31, 2012 3:38 pm
by Binary Blue
So you don't need any special settings to model the slide valve's effects?

Posted: Tue Jan 01, 2013 9:37 am
by jackssmirkingrevenge
The problem with modelling the slide valve is that it is entirely dependent on how fast you open it, so for our purposes an approximation with a "generic" valve setting usually suffices.