Cylinders
Types: Single-acting, multi-stage, two-piece
Donam Engineering Co., Ltd. cylinders are widely used not only in hydraulic elevators but also in industrial applications. Custom manufacturing is available, and with decades of technology and experience they are used in many places.
- Hydraulic cylinder leaked oil recovery device (Utility Model No. 382751)
- Mounting guide structure for cylinder rod (Utility Model No. 382798)
- Design registration of cylinder head (Design Registration No. 0395461)
Hydraulic Power Units
Hydraulic elevator manufacturers, especially companies specializing in power units, face difficult choices when selecting components. Component availability, price, durability and component reliability account for most of the decision, but functional and operational aspects are also considered. Here we provide guidance on component selection and look at the basic and optional characteristics that products used in power units and hydraulic elevators should ideally offer. We also hope this will serve as educational material for those unfamiliar with hydraulic power units or elevators, and provide solutions on what to know and what to ask when contacting suppliers and OEMs.
More about hydraulic power units
Oil Coolers
In hydraulic elevators, heat can be generated as the hydraulic oil temperature rises due to causes such as pressure loss from internal friction, viscous resistance and leakage inside the hydraulic pump; pressure drop in the controls and piping; pressure loss from passing through pressure relief and pressure-reducing valves; and losses due to motor efficiency.
Therefore, we recommend installing an oil cooler to protect the equipment, extend the service life of the hydraulic oil and maintain a comfortable ride.
More about oil coolers