German ARNDT valves ARNDT models ARNDT prices

ARNDT valves include vacuum ball valves, vacuum gate valves, vacuum venting valves, pneumatic vacuum valves, etc. Their function in a vacuum system is to change airflow direction, regulate airflow volume, and cut off or connect pipelines; such components are called vacuum valves.

ARNDT valve connection method: Flange connection

This is the most commonly used connection form for valves. According to the shape of the mating surface, it can be divided into the following types: 1) Smooth type: Used for valves with low pressure. Easy to process. 2) Male-female type: Higher working pressure, can use medium-hard gaskets. 3) Tongue-and-groove type: Can use gaskets with large plastic deformation, widely used in corrosive media, with good sealing effect. 4) Trapezoidal groove type: Uses oval metal rings as gaskets, used for valves with working pressure ≥ 64 kg/cm², or high-temperature valves. 5) Lens type: The gasket is lens-shaped, made of metal. Used for high-pressure valves with working pressure ≥ 100 kg/cm², or high-temperature valves. 6) O-ring type: This is a newer flange connection form, developed with the emergence of various rubber O rings, in terms of sealing effect connection form.

ARNDT valve cleaning steps

Valve components must undergo the following processes before assembly: 1) According to processing requirements, some components need polishing; the surface must not have machining burrs, etc.; 2) All components undergo degreasing treatment; 3) After degreasing, perform acid pickling and passivation; the cleaning agent must not contain phosphorus; 4) After acid pickling and passivation, rinse thoroughly with pure water; no chemical residue is allowed. Carbon steel components skip this step; 5) Wipe each component dry with non-woven fabric; no lint or other residues should remain on the component surface, or blow dry with clean nitrogen; 6) Wipe each component with non-woven fabric or precision filter paper soaked in analytically pure alcohol until no dirt color remains.

ARNDT valve fault resolution

Ball valves have long been subjected to material scouring, causing friction and severe impact wear, failing to meet normal production requirements and shortening equipment service life. Currently, wear-resistant materials such as ceramic materials and polymer composite materials are often used to address ball valve wear, with established technical systems being widely applied. Polymer materials offer superior adhesion and extreme wear resistance, safely solving the drawbacks of frequent metal wear and ensuring normal enterprise production. Moreover, the unique ceramic materials and special surface hardeners in the material provide wear resistance and physical impact resistance in the harshest dry grinding environments that surpass any steel or even tiles. The product's non-affinity with coal makes it an ideal material for preventing coal accumulation.

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