A pump test before the tank with clean machine oil or vegetable oil plant, pressing down the handle, see Oil press piston is rising. If the piston does not rise or handle the pressure when moving effortlessly, to check the oil Each valve box and to exclude air from the lines.
2 for the whole pressure test, pressure test using 1.25 times the working pressure, check the piston extension Out to the maximum working stroke, the regulator 15 minutes, pressure gauge reading drops shall not exceed the test pressure4%; All oil should be no leakage; pressure drop in all, the gauge pointer back to "0"Bit, the part should be no damage, trolley shall not have significant deformation, corn mill grinder, no catching phenomenon.
Three pairs of reliability test valve, the valve operating pressure adjusted (left +5, left +1) MPa Consecutive test five times, the needle valve opening and closing sensitive valve after each jump should not be less than the rated pressure gauge readings Working pressure.