Germany Roemheld valve Roemheld model Roemheld price

Roemheld valves include vacuum ball valves, vacuum gate valves, vacuum charging valves, pneumatic vacuum valves, etc. Their function in a vacuum system is to change the direction of airflow, regulate the flow rate, and cut off or connect the pipeline; such vacuum system components are called vacuum valves.

Roemheld valve connection method: Flange connection

This is the most commonly used connection form for valves. According to the shape of the joint surface, it can be divided into the following types: 1) Smooth type: Used for valves with low pressure. Easy to process 2) Concave-convex type: Higher working pressure, can use medium-hard gaskets 3) Tongue-and-groove type: Can use gaskets with greater 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, it is a sealing connection form.

Roemheld valve cleaning steps

Valve components must undergo the following processes before assembly: 1) According to processing requirements, some components need polishing, and the surface must not have processing burrs, etc.; 2) All components undergo degreasing treatment; 3) After degreasing, pickling and passivation are performed, and the cleaning agent does not contain phosphorus; 4) After pickling and passivation, rinse thoroughly with pure water, ensuring no chemical residue remains; this step is omitted for carbon steel components; 5) Wipe each component dry with non-woven fabric, ensuring no lint remains 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.

Roemheld valve fault resolution

Ball valves have long been subject to material scouring, causing friction and severe impact wear, which fails to meet normal production requirements and shortens equipment service life. Currently, wear-resistant materials such as ceramics and polymer composites are commonly used to address ball valve wear, with established technical systems widely applied. Polymer materials offer superior adhesion and exceptional wear resistance, safely resolving the frequent wear issues associated with metals and ensuring normal enterprise production. Furthermore, the unique ceramic materials and special surface hardening agents within the material provide wear and physical impact resistance in the harshest dry grinding environments that surpass any steel or even tiles. The product's non-adhesive property with coal makes it an ideal material for preventing coal accumulation.

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