Buildings exist in different grades, elevators also exist in different grades, usually the elevator is divided into high, medium and ordinary 3 grades. Different grades of elevators have different operation quality, price, energy consumption and maintenance cost. Considering the structural characteristics and usage characteristics of elevator products, the operation quality of elevators is mainly reflected in the technical performance and safety reliability of elevators. The choice of elevator grade should be determined comprehensively according to the use of the building, the requirements of the building on the service quality of the elevator, and the investment budget of the building, and it should be matched with the grade of the building. The same building can choose different grades of elevator considering its economy.
The grade of the elevator is related to the technological advancement of its mechanical and electrical systems, the quality of the configuration of the main components (traction machine, control cabinet, door system, safety components, etc.), the matching performance of the whole machine with the components, the performance and function of the elevator, the brand awareness, the origin of the components (imported or domestic), the decorations of the elevator, the ease of installation and maintenance, the quality of installation and construction, and the maintenance and repair of the elevator. The quality of installation and construction is related to the quality of maintenance and service life. Different types of elevators have different evaluation standards for their grades, and elevators of the same brand also have different grades.