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The shell components (cylinder block, side plate, gearbox, and housing cover) are made of GG-20 material. The shaft system is made of C 45 N material, and the rotor is made of C 45 N material (from GM3 S-type to GM 80 L-type). The shaft system and rotor are cast together. The GM 90 S-type and GM 130 L-type pistons are cast together with the shaft system, and the material is EN-GJS-500-7 (GGG50). The rotor is made of EN-GJS-400-15 (GGG40) material. The helical timing gear (from GM 150 S-type to GM 1080 L-type) is a 16 Mn Cr 5E gear.

The conveying chamber is sealed by four piston ring labyrinth seals, and each shaft end is equipped with oil throwing rings. Upon request, four radial sealing rings - piston ring labyrinth seals - can be selected. The drive shaft is sealed by a radial sealing ring. If the drive shaft is of an airtight design, two radial sealing rings can be used and equipped with an intermediate oil separator.

The AERZEN blower is equipped with a three blade rotor, and there are two cast in pre intake channels at the exhaust end of the cylinder block, which can reduce noise through pulse reduction function. The AERZEN blower adopts a ribbed shell and is cooled by air. For GM 400 L and earlier models, the AERZEN blower cylinder body is an integral type. Starting from the GM 430 S model, the cylinder block is divided horizontally. For GM 80 L and earlier models, the AERZEN blower has a bolted installation at the bottom, while the larger structure is cast in. The lubricating oil is supplied by the splash lubrication device.

AERZEN Company was established in 1864, and AERZEN blowers and compressors have developed high-performance equipment for the industry. AERZEN provides reliable, efficient, and energy-saving AERZEN blowers and screw compressors to customers from all over the world. AERZEN has developed into a global multinational enterprise in the field of special engineering. Its continuous research and development work has ensured the continuous progress of German AERZEN product technology. In environments that require high air volume, long conveying distances, and long-term non-stop operation, AERZEN product quality can be demonstrated. German AERZEN equipment can be used for conveying, compressing, and measuring air and other types of gases. The product is applied in industries such as petroleum, chemical, chemical fiber, natural gas, metallurgy, electricity, cement, food, municipal engineering,

On April 10, 2014, the 17th China Northeast International Power Transmission and Control Technology Exhibition was grandly held at the Shenyang International Exhibition Center. At the exhibition, Herna Trading (Dalian) Co., Ltd. introduced its European spare parts related business to customers, which received widespread attention from new and old customers. At the same time, the customer also raised their concerns, and our company's business personnel patiently and thoroughly answered them. The exhibition concluded successfully on April 12th.

We are a technology-based professional trading company that provides customers not only with high-quality industrial products from Europe, but also with the concept of overall products. It not only includes the physical parts of the product, but also includes additional benefits for customers. Because customers not only hope to purchase high-quality products, but also hope to purchase high-quality services. So we pay more attention to technical support in various stages of pre-sales, during sales, and after-sales.

On July 4-7, 2018, the Shanghai International Automotive Manufacturing Technology and Equipment and Materials Exhibition arrived as scheduled. As a world leading event in the automotive materials and design, process and equipment, quality and assembly, engineering and service technology industries, AMTS 2018 focused on showcasing innovative technologies and applications in future automotive engineering with the theme of "Traditional Manufacturing Meets Future Automotive Development". It attracted 800 exhibitors from around the world to participate and 80000 professional visitors to visit. Herna Trading (Dalian) Co., Ltd. exhibited its advantageous brands at the exhibition, and many customers came to inquire. Our staff provided detailed answers, which received recognition and attention from a large number of customers.