E Clip (E-type spring clip) in E-type railway fastener system, as the core clamping component, has rich specifications to meet the needs of different railway working conditions.
Common E Clip models include E1609, E1809, E1817, E2007, E2009, E2055, etc. Model naming usually contains key information. Although there is no unified standard interpretation, the first two digits may generally be related to the rail type or key size that the spring clip is suitable for. For example, the E16 series is different from the E20 series in terms of the rail parameters or track structure dimensions. The last two digits mostly reflect the design parameters of the spring clip itself. For example, E1809 and E1817 have differences in the opening size, clamping length, thickness, etc. of the spring clip. These different sizes lead to different clamping pressure and elastic properties.
From the perspective of buckling pressure, the E2009 model has a larger buckling pressure, which can reach about 13-18kN. It is suitable for high-speed or heavy-load railways, and relies on strong buckling pressure to resist the huge force of train operation; the E1809 buckling pressure is generally 10-15kN, which is suitable for ordinary trunk railways. While ensuring the stability of the track, it also takes into account the balance of cost and performance. In terms of elasticity, different models are also designed differently. For example, the E Clip used in urban rail transit needs to take into account noise reduction. Its elastic design can better absorb the vibration generated by train operation and reduce noise transmission.
In addition, different models of E Clip are also distinguished in material selection and manufacturing process. The E Clip commonly used in heavy-load railways may use high-strength spring steel, which is subjected to special heat treatment process to improve the material strength and fatigue resistance, and ensure long-term bearing of repeated loads of heavy-load trains; while the E Clip of ordinary lines uses lower-cost materials and conventional processes to reduce production costs while meeting performance requirements.