Hi there,

You can start with www.emmerson.com - download the control valve handbook.

From there you can start to visit the specific manufacturers web sites and download their manuals.

Another great resource www.automation.siemens.com - they have a great many donwnloadable resources.

The above mentioned sites all provide resources for free.

Regards,

Craig

You can get a limited preview of many different instrumentation books through

books.Google.com

Here is few pages of exactly what you asked for...

http://books.google.com/books?id=TxKynbyaIAMC&printsec=frontcover

Title :

Instrument Engineers' Handbook: Process control and optimization

Author: Béla G. Lipták

Here is a picture of the books cover

http://books.google.com/books?id=TxKynbyaIAMC&pg=PP1&img=1&zoom=3&hl=en&sig=ACfU3U2FVJkVghx5in2khlIKR-0esU1pEQ&w=575

Here you can find a lot of things.

http://ourmumbaicity.com/ebooks?gclid=COTI8PXptpgCFQxHQwodKBd-aw

Every useful site for Engineers