Germany Werthenbach valve Werthenbach model Werthenbach price

Werthenbach valve, also known as a flap valve, is a simple-structure control valve. A butterfly valve used for on/off control of media in low-pressure pipelines refers to a valve where the closing element (valve disc or butterfly plate) is a disk that rotates around the valve shaft to achieve opening and closing. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metals, and radioactive media. They mainly serve to cut off and throttle flow in pipelines. The opening and closing element of a butterfly valve is a disk-shaped butterfly plate that rotates around its own axis within the valve body, thereby achieving the purpose of opening, closing, or regulation.

Werthenbach valve working principle

A butterfly valve is a type of valve that uses a disk-shaped closing element to reciprocate and rotate approximately 90° to open, close, or regulate media flow. Butterfly valves not only have a simple structure, small size, light weight, low material consumption, small installation dimensions, low driving torque, and simple and rapid operation, but also possess good flow regulation functions and shut-off sealing characteristics. They are one of the fastest-developing valve types in the past decade or so. The use of butterfly valves is very widespread. The variety and quantity in use continue to expand, developing towards high temperature, high pressure, large diameter, high sealing, long service life, excellent regulation characteristics, and multi-functionality. Their reliability and other performance indicators have reached a high level.

Werthenbach valve cleaning steps

Valve components must undergo the following processes before assembly: 1) According to machining 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 to ensure 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 stains remain.

Werthenbach valve applicable occasions

Butterfly valves are suitable for flow regulation. Due to the relatively large pressure loss of butterfly valves in pipelines, the robustness of the butterfly plate to withstand pipeline media pressure during closure must also be considered. In addition, the limits of the working temperature that the elastic seat material can withstand at high temperatures must be considered. The structural length and overall height of butterfly valves are small, opening and closing speeds are fast, and they have good fluid control characteristics. The structural principle of butterfly valves is most suitable for manufacturing large-diameter valves. When using a butterfly valve for flow control, it is most important to correctly select the size and type of the butterfly valve so that it works appropriately and effectively. Typically, in throttling, regulation control, and slurry media applications, where short structural length and fast opening/closing speed (1/4 turn) are required, and for low-pressure shut-off (small pressure difference), butterfly valves are recommended. Butterfly valves can be selected for two-position regulation, constricted passages, low noise, cavitation and vaporization phenomena, slight leakage to the atmosphere, and abrasive media. For throttling regulation under special operating conditions, or where strict sealing is required, or under severe wear and low temperature (cryogenic) conditions, special design metal-sealed triple-offset or double-offset dedicated butterfly valves with regulation devices must be used. Butterfly valves are suitable for fresh water, sewage, seawater, salt water, steam, natural gas, food, pharmaceuticals, oil products, and various acid and alkali pipelines where complete sealing, zero gas test leakage, high service life requirements, and working temperatures between -10 degrees and 150 degrees are required. Soft-sealed eccentric butterfly valves are suitable for bidirectional opening/closing and regulation in ventilation and dust removal pipelines, widely used in coal gas pipelines and water channels in metallurgy, light industry, electric power, and petrochemical systems. Metal-to-metal line-sealed double-offset butterfly valves are suitable for urban heating, gas supply, and water supply pipelines for coal gas, oil products, acids, and alkalis, serving as regulation and throttling devices. In addition to being used as program control valves for large-scale pressure swing adsorption (PSA) gas separation units, metal-to-metal face-sealed triple-offset butterfly valves are also widely used in petroleum, petrochemical, chemical, metallurgy, electric power, and other fields, serving as good alternatives to gate valves and globe valves.

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