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The vacuum sizing box plays a key role in sizing cooling in the vacuum pipe production line. The box is made of high-quality anti-corrosion stainless steel material, the spray system uses ABS atomizing nozzles, full PLC control, with automatic inlet and drain, automatic water level control, automatic water temperature control, dual channel water supply, waterproof and explosion-proof lighting inside the box, vacuum degree Frequency automatic adjustment device, etc. The vacuum device uses a water ring vacuum pump, and the vacuum degree is generally controlled at -0.01 to -0.08 MPa.