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With NPT, a thread sealant is necessary because the threads in the male are not full threads, as such, when screwed into a female end there is a spiral "gap" right through the connected joint. However with NPTF (Dryseal), there is a full thread on both male and female ends which means a full...

I do not recommend using anything but the same type of oil that the machine is designed to use. However, using a very thin (low viscosity) oil of the same type, as a flushing medium, would be ok. The main issue is seal compatibility. Most O-rings are compatible with hydrocarbon oils, etc. But...

Firstly, if you want to add another valve bank inline with the first valve bank, the first valve bank must be fitted with a power-beyond sleeve, and the first valve bank must have an integral relief valve built in or one connected externally to the "P" line correctly. Why both components? The...

It is maybe likely that the line from the control valve back to tank is too small creating too much back pressure, and this back pressure is putting more force on the piston ends of the cylinders than the rod ends, because the the piston ends have the bigger areas. (remember F=PxA)