The double check valve control two up and down by gravity oil run using the hydraulic power unit does not interfere with each other; the two oil supply valve can realize manual oil supply of oil; two emergency cut-off valve in the system when the power of lifting equipment speed decreased; the series are widely used in large shear lift.
1.This power which can only work intermittentlyand repeatedly ,ie.,1minute on and 8 minute off .
2.Clean all the hydraulic parts concerned before mounting the power unit .
3.Viscosity of the hydeaulic oil shoud be 15~68cst,which should also be clean and free of impurities.ISO46 hydraulic oil is recommend.
4.The power unit should be mounted vertically.
5.Check the oil level in the tank after the initial running of the power unit .
6.Oil changing is required after the initial 100operation hours,afterwards once every 3000 hours.
7.wei are at your disposal to offer you the power units with your favorate power ,flow,pressure as well as the tank capacity.
Schematic diagram of oil circuit:

