KPMBOLT super nuts undergo 100% full-process inspection, delivering uniform preload, stable sealing and long-term anti-loosening performance for turbines, generators, cylinders and bearings.

Power equipment is the core of national energy security. Steam turbines, gas turbines, and generators are key units in power plants. Key components such as cylinders, flanges, valves, and bearing seats require extremely high precision, sealing performance, and stability. Under high – temperature, high – pressure, and high – speed conditions, traditional nuts may cause uneven preload, stress concentration, leakage, and even equipment breakdown.

German KPMBOLT Super Nuts, inheriting nearly 200 years of fastening technology from JUNGEBLODT, adopt a multi – jackbolt structure and strict quality control, making them the most reliable high – precision fastening solution for turbines.

KPMBOLT Super Nuts consist of a nut body, jackbolts, and thrust washers, all manufactured in accordance with the Manufacturing and Inspection Process Plan (MPP). The nut body is made of high – strength alloy steel with a material certificate, consistent batch, and heat number. Its chemical composition is verified in accordance with specifications using a trometer, compliant with GB/T 3077. It is heat – treated to HRC 30–36, and 100% hardness – tested. The grain size is ≥5 grade, and it is 100% UT – tested (EN 10308 Level 4).

Jackbolts use higher – grade steel, with a hardness of HRC 48–54. They are 100% hardness – tested, with a yield strength ≥1500MPa, and 100% MT – tested (EN 10228 – 1 Level 4). Washers have a hardness of HRC 40–44, and are precise and defect – free. Pure axial preload ensures uniform force with an error <5%, eliminating leakage and deformation.

Widely used in turbine cylinders, flanges, valves, bearings, and couplings. Sizes range from M30–M150, with a temperature range of – 25℃~250℃. They can directly replace original nuts and are easy to install. Leakage failure is reduced by 95%, and maintenance is reduced by 70%.

With a Chinese patent and fully traceable quality, KPMBOLT meets power equipment standards. With energy development, KPMBOLT provides safer, more reliable, and more efficient fastening for turbines, supporting the high – quality power industry.

References:

[1] GB/T 3077;

[2] KPMBOLT MPP documents;

[3] JUNGEBLODT technical data;

[4] Power Equipment Technology.