Rubber o-rings are the most common seals used in machines. Rubber o-rings are used as fixed and moving seals, and their materials are usually synthetic rubber compounds. O-rings are used to seal pistons in cylinders, hydraulic valves, hoses and pumps.
Rubber balls play the role of sealing in diaphragm pumps and safety valves. Due to the importance of these rubber balls in the industry, they should be metric type in terms of weight and density.
