What are the functional requirements of the four-column hydraulic press for the filling valve

In the hydraulic system of the filling valve in the four-column hydraulic press that we use, especially in some large four-column hydraulic presses, the hydraulic pressure is a more common component for garment making. In order to improve the production rate or reduce the temperature rise of the operation when hot pressing. It is required to have a faster air speed and return speed, often dozens of times the limit speed. In order not to add (rapid use) auxiliary hydraulic pump, reduce the loss of work, the selection of liquid filled system is the most effective way. So what kind of requirements does the four-column hydraulic press have on the function of the filling valve? The following Xiaobian will introduce the functional requirements of the four-column hydraulic press for the liquid filling valve as follows:

1. Reverse leakage. It is required that the valve port can be tightly closed, and no leakage is allowed or only a very small amount of leakage is allowed. Otherwise, it will add the energy consumption of the system to increase the hydraulic pressure (cylinder boost time, reduce the production power of the equipment (refers to the amount of work done by the object in the unit time), which cannot reach the regular working pressure, affecting the processing quality of the workpiece;

2. Positive open pressure. The filling valve is opened by self-priming when filling, so the forward opening pressure of the filling valve is required to be as low as possible. The general requirement of the opening pressure is 0·007-0·03mpa;

3. Pressure loss. The pressure loss of the filling valve is smaller than that of the general check valve and the hydraulic control check valve, so as to quickly fill the liquid and discharge the oil;

4. Manage stress. The operating pressure of the filling valve depends on the structure of the filling valve and the pressure in the hydraulic cylinder. Generally, it is not appropriate to use too high control pressure, otherwise it will cause the impact and vibration of the large four-column hydraulic press.