Double Stage Bolt Tensioner
Double-stage tension, spring/load return optional, over-travel protection for frequent use without leakage, long service life, reduce maintenance costs professional, one specification cylinder can be matched with a variety of specifications bolt tensioning head, according to the user’s working conditions and different environments, can be customized multi-stage bolt tensioner, the maximum working pressure has two or more options with over-travel protection, can be customized according to user requirements for stroke length.
●Two-stage cylinder design increases the tensioning length.
●Made of special high strength steel, rust-proof and corrosion resistant surface treatment.
●Smaller outside diameter permits use in narrow space.
●Spring return and overtravel protection suits frequent operation.
●Operated by ultra-high pressure hand pump or electric.
Flange bolt tightening sequence and procedure
SOLY hydraulic bolt tensioner is the fastest, safest and most accurate way to apply the pre-set residual load to the bolt.
The single simultaneous operation of multiple hydraulic bolt tensioners can easily complete a precise and pre-set bolt load, so that the flange gasket is evenly stressed and compressed, which is important for tightening the bolted connections in critical areas.
The ideal operation is to stretch all the bolts on the flange connection at the same time [ 100% ], however, 50%, 33% or even 25% at the same time is also possible. This requires the operator to stretch the bolts in exactly the opposite direction in two, three or four times in sequence. Partial tensioning takes a little longer to complete the job, and the user has the discretion to choose between the cost of the equipment and the time spent.
SOLY hydraulic bolt tensioner is a device designed for direct tensioning of bolts. A hydraulic cylinder and thread tensioning head are used to apply a pre-set load on the bolt. A pre-set load is applied to the bolt. After the threads of the bolt have been stretched, the nut is turned downward with a draw bar until it is tightly pressed against the flange connection surface. The hydraulic pressure [load] is released and the tension [remaining load] is retained within the tensioned length of the bolt, and the tightened nut prevents the bolt from returning to its original length.
For safe operation of the hydraulic bolt tensioner, the part of the bolt thread above the nut needs to be at least one bolt diameter long. This facilitates the bolt tensioner to be placed on the equipment.
It is quick and easy to put the hydraulic bolt tensioner on the bolt. It is quick and easy to put on the bolt, just keep the bolt and nut well cleaned and lubricated.
Accurately calculate the correct load to be applied to the bolt to ensure accurate residual load transfer to the bolt. Either use 100%, 50%, 33% or 25% simultaneous stretching procedure.
Note: If there is not enough space on one side of the flange to put down all the bolt tensioners to complete the 100% stretching procedure, the bolt tensioners can be put on the other side of the flange.
Application Scenarios of SOLY HS Two-Stage Bolt Tensioners
The SOLY HS Two-Stage Bolt Tensioners are designed for a wide variety of applications that require high precision and reliability when tensioning bolts under high pressure. They are especially suited for industries such as construction, oil and gas, mining, and power generation, where the safe and efficient application of tension to bolts is critical.
1. Industrial Machinery Assembly
In industrial machinery assembly, tight and consistent bolt tension is required to ensure the integrity and safety of mechanical systems. The SOLY HS Two-Stage Bolt Tensioners provide a reliable solution for applying precise tension to large bolts used in machinery such as turbines, generators, and compressors. These bolts play a critical role in the performance of industrial machines, and improperly tightened bolts can result in mechanical failure or performance loss. The SOLY HS tensioners guarantee uniform load distribution, preventing bolt loosening or fatigue over time.
- Use Case Example: In a manufacturing plant, technicians use the SOLY HS Two-Stage Bolt Tensioner to apply consistent tension to turbine bolts, ensuring optimal performance and preventing failure due to bolt slippage.
2. Offshore Oil and Gas Operations
Offshore platforms are subjected to extreme environmental conditions, and ensuring the integrity of structural and mechanical components is vital. The SOLY HS Two-Stage Bolt Tensioners are widely used in the offshore oil and gas industry for tightening bolts on offshore platforms, drilling rigs, and pipelines. These tensioners are designed to withstand the harsh environments of offshore operations, providing reliable performance even in corrosive or high-pressure environments.
- Use Case Example: On an offshore oil platform, workers use the SOLY HS Two-Stage Bolt Tensioner to apply precise tension to critical bolts on the drilling rig, ensuring that the equipment remains secure and operational under high-pressure conditions.
