slide valve

Hi dear sirs
how does a slide valve work?
i can't find good answer for this question.
so, i'm looking for a hero to give me the gooooooooood answer
thank you all

On what application is the valve ?

on what aplication is this SLIDE VALVE? what dose it do?

A slide valve is a method of loading and unloading a screw compressor. It simply covers more of the flutes of the screw and opens the delivery port a little more that is all.

If you visualize the slide moving back and forth under the rotors all it does is change the effective length of the rotor used for compressing vapor. At low capacity only a small percentage of the total rotor length is used, therefore less capacity.

Please check this book. sorry it is devided into 14 sections because I could not even attach the download link,

Please check this book. sorry it is devided into 14 sections

No 3 and 14

These are 4 - 5 - 13

these are 6 and 11

these are 7 and 8

the next sections

this is 10 manual

the last one 12

Hope it help you all.

I think after 15 posts, now I can add the direct download link for the book which is
http://www.pdfgeni.com/book/screw--slide-valve-pdf.html

All the best

Thanks 4 the info