Electro Hydraulic Proportional Control Valve

(1) Applicable hydraulic oil

Petroleum base oil or water - ethylene glycol hydraulic oil: equivalent to ISO Vg32, Vg46 and Vg68 oil

Synthetic liquid (phosphate ester liquid or polyol ester liquid)

(2) Oil viscosity and oil temperature

Recommended viscosity range is 20 to 200mm²/s(cst), and temperature range is -5 to +60 ℃

(3) Pollution control:Please ensure that the pollution level is NAS1638-11

(4) Mounting:Ensure that the exhaust port faces up

(5) Air elimination of proportional control valve

In order to keep the control steady, you should gradually loosen the exhaust bolt at the end of the pressure/flow electromagnet until there is no air bubble in the oil flowing out. You should choose the most upward one among the 3 exhaust ports of the pressure electromagnet to exhaust the air.

(6) Manual adjustment screw

In case of initial adjustment or no input current into the valve due to electrical failure and other problems, you can rotate the manual adjustment screw to temporarily set the pressure and flow of the valve. However, under normal circumstances, the manual adjustment screw must be returned to the outermost end.

(7) Oil return pipe and drain pipe

The back pressure of the oil return pipe and the drain pipe directly affects the lowest regulated pressure or the control of the flow valve spool, therefore, the oil return pipe or the drain pipe cannot be converged with other pipes, but should be individually connected to the oil tank below the liquid level, so that the back pressure is as low as possible.