There are two kinds of hydraulic control systems of the machine for repairing cattle hooves. One is a series system, which is controlled by a hydraulic direction valve connected in series with a pipeline. The first two hydraulic direction valves need to add the function of HPCO and then the third hydraulic direction valve. The other system is the parallel system, in the parallel system, each hydraulic direction valve is independently controlled, and the hydraulic oil is independently returned to the tank. Now we show how the series system works.

For example. there are 4 groups of hydraulic directional valves on the system of a shoe repair machine, then the second hydraulic directional valve needs to be connected to the second hydraulic directional valve, and the third hydraulic directional valve needs to be connected to the second hydraulic directional valve. Then the set pressure from the first hydraulic directional valve to the third hydraulic directional valve can only be the set relief valve pressure of the first hydraulic valve is 210bar, which is higher than the second hydraulic directional valve. The relief valve pressure of the second hydraulic directional valve is 190bar, and the set pressure of the relief valve of the third hydraulic directional valve is 160bar. The set value of the relief valve of the second hydraulic directional valve is higher than the pressure value of the relief valve of the third hydraulic directional valve, because the middle of the first hydraulic valve and the third hydraulic directional valve are connected with hydraulic pipes. This pipeline will cause a certain loss of pressure, the first hydraulic directional valve pressure must be the highest, the fourth hydraulic directional valve does not need HPCO, the front two hydraulic directional valves are not working, the hydraulic oil directly through the third hydraulic directional valve back to the hydraulic tank.

We can provide many brands of hydraulic directional valves, such as Walvoil, Hydrocontrol, GMS, BLB, Akon,Youli, etc., including some Chinese brand substitutes. Hydraulic direction valve's work flow have 45 l/min, 60 l/min, 80 l/min, 100 l/min, 150 l/min, 240 l/min, 350 l/min.