Overview: The document provides technical specifications for the ESD series single-stage hydraulic bolt tensioners, designed for high-strength bolts of grade 10.9. These tensioners operate at a maximum working pressure of 150 MPa and feature an automatic return mechanism to reduce labor intensity. A red overstroke warning line is included for operator safety.

Specifications: The tensioners are available in various models, each specified by thread size, tensile force, and dimensions. Key specifications include:

• Model ESD 20 to ESD 100, covering thread sizes from M20×2.5 to M100×6.
• Tensile force ranges from 200 KN to 5830 KN.
• Dimensions such as D1 (thread diameter), A/F (across flats), D2, D3, D4, and heights H1, H2, H3 are provided for each model.

Applications: These tensioners are primarily used for high-strength bolts in various industrial applications, ensuring secure and efficient bolt tensioning.