Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info
MMD > Archives > October 2005 > 2005.10.20 > 07Prev  Next


Use Leather in Pneumatic Valves
By Don Teach

Why I use leather.  First it is original to the machine.  It worked

when it was new.  It has less friction than other materials so valves

can seat.



The greenish residue found on valves is verdigris.  I don't understand

the chemical process but it occurs when certain leathers are used with

brass.  Leather tanned with tannic acid is the leather that reacts with

brass to form verdigris.  Leather that is vegetable tanned does not.



Perhaps one of you chemists out there can offer a solution.  The tan

colored leather sold by Player Piano Co. in the 1970's was acid-tanned

leather that reacted with brass.  I have a Coinola that I am redoing

because of the leather.  The pneumatic cloth sold at that time has held

up very well.



Don Teach

Shreveport, Louisiana




(Message sent Thu 20 Oct 2005, 14:52:44 GMT, from time zone GMT-0500.)

Key Words in Subject:  Leather, Pneumatic, Use, Valves

Home    Archives    Calendar    Gallery    Store    Links    Info   


Enter text below to search the MMD Website with Google



CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2024 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Please Support Publication of the MMD with your Generous Donation

Pay via PayPal

No PayPal account required

                                     
Translate This Page