1. Oil viscosity and temperature
· Oil viscosity ranging from 15-400mm2/s, temperature range from - 15 to 70 degree are recommendable.
· Always keep hydraulic oil clean; Use the line filter finner than 25 micron in the tank line.

2. Installation
· Valves can be installed in any dirction.
· Finish the mounting surface flat and smooth within roughness of 6. 3S and flatness of 0.01mm.
· Use the 0 ring the hardness of HS-90 for the gasket mouting.
· Provide the return piping from the hydraulic valve to the tank lower than liquid level in the tank.