Hydraulics
May 08 -A new page under Development!
Hydraulic Technical Library - This is an excellent comprehensive site with heaps of Maintenance and Troubleshooting Links, Application Guidelines along with Formulaes and Technical reference data.
Hydraulics Calculations, Formulas and Rules of Thumb - a useful range of calcs, formulas etc - from hydraulicsystems.com
Hydraulic Troubleshooting - Many of the failures in a hydraulic system show similar symptoms: a gradual or sudden loss of high pressure, resulting in loss of power or speed in the cylinders. In fact, the cylinders may stall under light loads or may not move at all. Often the loss of power is accompanied by an increase in pump noise, especially as the pump tries to build up pressure. Any major component (pump, relief valve, directional valve, or cylinder) could be at fault. In a sophisticated system other components could also be at fault, but this would require the services of an experienced technician. By following an organized step-by-step testing procedure in the order given here, the problem can be traced to a general area, then if necessary, each component in that area can be tested or replaced - from hydraulicsystems.com
Hydraulic Symbols - This technical reference covers hydraulic symbols pretty well -from patchn.com
Hydraulic Symbols Tutorial - This is a good tutorial for people who would like to know more about hydraulics - from patchn.com
Hydraulics Education Site - This technical reference site by R van den Brink has some useful information.
The following useful hydraulic links are from Precision Fluid Power, Inc
Production Subsea Control Systems - An Introduction -
Hydraulic Data Book - This useful publication from Hyquip covers Hydraulic Units, Conversions and Symbols, General Formulae, Hydraulic Symbols, Hydraulic Pipes and Hoses, Accumulators, Hydraulic Cooling and Heating and Terminology.
Hydraulic Fault Finder - This useful publication from Hyquip covers Lack of Delivery, Lack of Pressure, Excessive System Noise, Causes of Pump Failure, Irregular Cylinder Action and Excessive Fluid Temperature.
Leak Sealant in Hydraulic Systems minimises Maintenance Costs in Offshore Wells - Miguel A. Mendoza, and Javier Hernandez/PEMEX, and David W. Rusch - One of the main problems detected by Petroleos Mexicanos in the offshore wells of the Marine Region are related to flaws in the hydraulic systems, both surface or subsurface, of the subsurface safety valves, which are one of the most important control devices that are required in this region by regulation. This paper covers this issue. From Seal-Tite International.