In a broad sense, the industry uses the method of electrolyzing saturated NaCl solution to produce NaOH, Cl2 and H2, and uses them as raw materials to produce a series of chemical products, which is called the chlor-alkali industry. In a narrow sense, the chlor-alkali industry mainly includes two...

1.Why is helium used to detect leaks? Helium is used as a tracer gas to detect leaks for several reasons. These include the fact that it constitutes only ~ 5 ppm in air so that background levels are very low. Helium has also relatively low mass so that it is ‘mobile’ and is completely inert/non-r...

More than ten years ago, we began to apply cryogenic pumps and dry pump oil-free systems in vacuum electronic technology-related process equipment to obtain ultra-high vacuum, with satisfactory results. This attempt is to apply the unique advantages of cryogenic pumps, which are fast, clean and r...

Helium leak detectors are widely used. According to the sealing requirements of different products, negative pressure method, positive pressure method and helium pressure method are used. 1.Leak detection for negative pressure method Negative pressure method leak detection is to connect the detec...

Eight major semiconductor manufacturing processes: wafer manufacturing → oxidation process → photolithography process → etching process → deposition and ion implantation process → metallization process → EDS process → packaging process. The following mainly introduces the semiconductor wafer manu...

Our company specializes in processing for customers: vacuum chambers, vacuum furnace bodies, vacuum boxes, vacuum chamber bodies, vacuum valves, vacuum pipelines, various types of racks, as well as welcome drawings, materials, samples, and welding processing; Focused on cavity for twelve years. ...

  Liquid Ring Vacuum Pump used in Urea and melamine formaldehyde resins production plant   The most outstanding feature of wood adhesives is their large dosage. The cost, variety and quality of adhesives directly affect the cost, quality and use of artificial boards. Therefore, most woo...

01 Helium mass spectrometer leak detector of principle A helium mass spectrometer leak detector is an instrument commonly used to detect small leaks in vacuum systems or sealed systems. The principle is based on the low permeability and high sensitivity of helium. The gas mixed with the leaked he...

The top packaging of EVP company’s large vacuum pump(such as liquid ring vacuum pump, roots vacuum pumps, rotary piston vacuum pump, etc.) adopts the form of self-tapping screws, which is very conducive to the user or dealer to open the box, and the export goods using this screw is also convenien...

1.What is electron beam welding? Electron beam welding is a type of fusion welding that uses a concentrated high-speed electron beam to bombard the joints of the workpiece to generate heat energy to fuse the metal. 2.Basic principles of electron beam welding Under vacuum conditions, electrons esc...