If anybody feels like there are copyright issues, do contact me, and we shall deal with it.
Gear Pump Displacement Calculator - an App that I wrote to make my life easier. It calculates external gear pump displacement and allows you do download the data in a nice pdf file. More about gear pump displacement calculation here.
Interactive Standard O-ring Size Table
Cylinder Mounted Pilot-to-Open Check Valve Interactive Pressure Chart
Interactive Nomogram for Sizing Hydraulic Hoses
Maximum Pressure Calculator for Steel Pipes and Cylinder Tubes