In general, a complete vacuum packaging system includes a vacuum pump, a vacuum gauge, and a vacuum solenoid valve.
There are two kinds of vacuum pump installation methods, one is built-in type, usually adopts XD-020, XD-040 single-stage rotary vane vacuum pump, the general 400 type packaging machine adopts XD-020 pump, and the 500 type packaging machine adopts XD-040 pump. Some manufacturers also use two XD-020 pumps instead of one XD-040 pump to reduce costs, but the XD-020 pump is 2880 rpm, high speed, fast wear and short service life, while the XD-040 pump is 1440 rev / min, low speed, large force distance, relatively long service life. The other type is external type, usually adopts 2X-15 two-stage rotary vane vacuum pump. The pump has high pumping speed and higher vacuum than single-stage pump. It is generally suitable for large production batches, high vacuum requirements, or requirements. Installed outdoors to reduce exhaust pollution.
The vacuum gauge usually adopts the axial front side, and is installed on the operation panel or the front of the fuselage. It is commonly used for 表60, with an accuracy of 2.5; ¢100, with an accuracy of 1.5.
Vacuum solenoid valves usually use two, one is a 二5 two-position three-way solenoid valve, the main function is to control the upper and lower displacement of the hot-press sealing device. The other is a 二15 two-position two-way solenoid valve. The main function is vacuum. After the heat seal is completed, the passage is opened to return the atmosphere to the vacuum chamber, otherwise the vacuum chamber cannot be opened.