I am looking for as many useful portal sites as possible about "pump
industry" in the USA. By the word of the portal site, I mean web sites
which list a lot of information on pump industry in the USA such as
major companies in the industry, the size of the market, the trend and
forecast of the market, and so forth. I have already found "Thomas
Register","Thomas.Net",and "Global Spec". So I do not need any
information on these sites. Please teach me at least 10 web sites
regarding pump industry. Hopefully you will add basic explanation
about each site to your search result. Thanks.

Do you mean pumps like those used on a bottle fopro lotion or pumps as
in a sump pump?

Chris 

http://www.pumpking.com

The largest industrial pump companies in the US for ANSI pumps are
Goulds Pumps and Durco Pumps.  Goulds, Durco, and Ahlstrom are the
major players in the US Pulp and Paper Market.  The largest diaphragm
pump companies are Wilden, Sandpiper, ARO, Versamatic and Yamada.  I
have over 13 years selling hundreds of types of pumps.  Let me know
exactly what you need.