Qihai Electromechanical Manufacturing is specialized in the production of high-end miniature vacuum pumps, miniature air pumps, etc., the products are widely used in robot, chip adsorption device, printing equipments and other industrial automation equipment.
A lot of equipment manufacturers all over the country cooperate with us all the year round, purchasing miniature vacuum pumps and vacuum suction cups in bulk for adsorption of goods. The following models are the most used:
Model Adsorption force per square centimeter area* (Kg)
(theoretical value) Flow rate
(L/min) Remarks
PK5008 0.5 8
PC4020N 0.6 20
PC3025N 0.7 25
PVCA5038B 0.7 25
PVCA5038B 0.7 25
PVCA5038B 0.7 25
PVCA5038B 0.7 25
This is the most popular vacuum pump in the world. p>VCA5038B 0.5 38
VCH1028 0.9 28
The "adsorption force" data in the above table is the value of adsorption force per square centimeter of area of the suction cup when the pump is evacuated with no air leakage at all (which is almost impossible). In general, there is more or less air leakage between the object and the suction cup. The airtightness between the item and the suction cup is a key factor that affects the adsorption effect and even determines the success or failure, and must be dealt with.
Theoretically, the size of the adsorption force is only related to the vacuum degree of the pump and the area of the suction cup, and has nothing to do with the flow rate of the pump, but in actual use and the flow rate parameters of the pump are related. The reason is as follows: because the suction cup and the suction object can not do between the absolute seal, there is always a little leakage, in this case, the larger the flow rate of the miniature vacuum pump, the leakage accounted for the smaller the proportion, the more conducive to maintaining a higher degree of vacuum, so as to get a greater adsorption force. For example, there are two pumps with the same vacuum degree, pump A has a flow rate of 1 L/min, pump B has a flow rate of 20 L/min, also in the case of 0.5 L/min leakage, the vacuum degree of pump A will be reduced a lot because 0.5 L/min leakage occupies 50% of the flow rate for pump A, which is too big. But a 0.5 L/min leak is only 2.5% of the flow for pump B, which is nothing, and the suction cup can still maintain a high vacuum. Therefore, although the two vacuum is the same, but in practice, the B pump produces more adsorption. Therefore, the pump selection must be considered both vacuum and flow two indicators, only focus on the vacuum index is not enough.
Objects are sucked after the release of the problem. Pump shutdown, the object will not necessarily be immediately dislodged, because the pump have a certain ability to retain pressure, the vacuum will continue to maintain a moment. To release immediately, it is necessary to add a pressure relief branch between the pump and the suction cup, the branch is connected to a valve, open the valve relief, eliminating the vacuum of the airway system, so that the object can be reliably released.
High reliability is the biggest advantage of our products. For the miniature vacuum pump mentioned above, the pump can run continuously around the clock for several months without breaking down when the pumping port is completely blocked (i.e.: full-load vacuuming), and the reliability parameters are shown in the table below. The following table shows the reliability parameters. This is a test made under the worst working conditions. Normally, the pump is operated intermittently every day, in which case the "trouble-free operation time" will be very long and much larger than the values in the table below. 2000 hours
VCH1028-24V ＞2000 hours
All of these products are maintenance-free; the pump is oil-free, and will not discharge oil mist-containing gas, and does not require refueling and maintenance; not afraid of pumping humid gases, but the extracted gases must be clean and free of dust, and require the addition of filters, or else the accumulation of dust in the pump will lead to a decrease in suction power.
It is because our products have the above advantages, so also widely used in medical equipment, military supplies. The price is 420～1600 dollars per unit depending on the model.
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