Further Know The Performance And Precautions Of Filling Valves
In some high-speed press machines or injection molding machines, where oil is the energy source, the oil amount may appear to be insufficient. When the oil isn’t enough in the supply situation, it may affect the production schedule, and reduce the production efficiency. Hence, to solve this problem, we need to charge the installed valve on the machine. The resultant effect may be unloading. You can avoid the impact of unloading by knowing the performance needs of the liquid filling valve. Here is also a look at what are the relevant considerations.
What’s The Performance Needs of The Liquid Filling Valves?
- Positive opening pressure. We open the filling valve through self-priming when filling the liquid, for the positive opening pressure of the filling valve to be as low as possible. The opening pressure is usually between 0.007-0.03mpa.
- Reverse leakage. The valve port needs tight closing to ensure no leakage or to allow only a very small amount of leakage. Otherwise, it will increase the energy consumption of the system, prolong the pressure boost time of the hydraulic cylinder, and reduce the production efficiency of the equipment. This overall results in less than the specified working pressure, affecting the processing quality of the workpiece.
- Pressure loss. The pressure loss of the liquid filling valve is smaller than that of the general check valve and the liquid controlled check valve, so as to quickly fill and discharge oil.
- Control stress. The control pressure of the filling valve depends on its structure and the pressure in the hydraulic cylinder. Generally, do not use too high control pressure, otherwise, it will cause the impact and vibration of the equipment.
For filling valves, the positive opening pressure is fixed. The designer needs to choose the appropriate caliber of the liquid filling valve according to the needs of the host. This feature helps make the pressure loss as small as possible while determining its actual control pressure. For users, it is necessary to ensure the cleanliness of the oil and prevent impurities such as iron filings from remaining in the valve seal and causing damage to the sealing ring.
What’re The Precautions For Filling Valves?
- You must consider adding a separate pressure relief device in the oil path, when you choose an ordinary filling valve or pioneering filling valve, to greatly reduce or eliminate the hydraulic impact of the instant of rapid oil discharge.
- To meet the process requirements. You need a selection of performance parameters of the liquid filling valves, such as diameter or hydraulic flow rate.
- The control pressure of the liquid filling valves needs to be below, while the pressure boost rate of the control pressure needs to be controllable.
- The processing, assembly, and maintenance team working with the hydraulic system, must ensure that the pipeline, valve block, oil tank, etc. are clean, to prevent the mixing of iron filings, welding slag, and other dirty foreign matter that cause the failure of the hydraulic components function.
- During debugging and maintenance, you need to reset the control parameters of the liquid filling valve. These parameters include the control pressure, minimum unloading pressure, and unloading time. The debugging and maintenance personnel are vital to determine the appropriate control parameters according to the technological needs and the user needs of the liquid filling valves.
Above is info on the performance needs of the filling valve and the related precautions. So, when choosing and using the filling valve, you can refer to the above precautions. It must ensure the normal operation or production, you need to repair it in time.
What Are The Performance Requirements For Filling Valves?
In the hydraulic system, we can find the filling valve in a large hydraulic press, injection molding machine, rubber machine, edge press, other high-speed and high-pressure holding requirements of the machinery. The filling valve is one of the common hydraulic components. If you want to meet the use standards, there are certain requirements for its performance. These include a positive opening pressure, reverse leakage, control pressure, and other aspects. Also, when using the filling valve, what things do you need to pay attention to?
Performance Requirements Of A Liquid Filling Valve
- Positive opening pressure. We open the filling valves through self-priming when filling the liquid for the positive opening pressure of the filling valve to be as low as possible. The opening pressure is usually between 0.007-0.03mpa.
- Reverse leakage. The valve port needs tight closing to ensure no leakage or to allow only a very small amount of leakage. Otherwise, it will increase the system’s energy consumption, prolong the pressure boost time of the hydraulic cylinder, and reduce the production efficiency of the equipment. This overall results in less than the specified working pressure, affecting the processing quality of the workpiece.
- Manage stress
The control pressure of the filling valve depends on its structure and the pressure in the hydraulic cylinder. Generally, do not use too high control pressure, otherwise, it will cause the impact and vibration of the equipment.
What Precaution Measures Do You Need To Pay Attention To?
Note when using liquid filling valves:
- Whether you choose an ordinary filling valve or a pilot filling valve, you must consider adding a separate pressure relief device in the oil path to minimize or eliminate the hydraulic impact of rapid oil discharge.
- The selection of performance parameters of the liquid filling valves, such as diameter or hydraulic flow rate, must meet the process requirements;
- The control pressure of the liquid filling valve should not be too high, and the pressure boost speed should be controllable.
- When the processing, assembly, and maintenance team working with the hydraulic system, We must ensure that the pipeline, valve block, oil tank, etc. are clean to prevent the mixing of iron filings, welding slag, and other dirty foreign matter that cause the failure of the hydraulic components function.
- In the process of debugging and maintenance, it is often necessary to reset the control parameters of the liquid filling valve. These parameters include the control pressure, minimum unloading pressure, and unloading time. Therefore, the debugging and maintenance personnel must determine the appropriate control parameters according to the filling valve’s technical needs and user needs.
This small series help to introduce a few things you need to pay attention to in the use of liquid filling valves. If you have any doubts, you can contact us!
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