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Hydraulic Bolt Tensioner

Ningbo Instruments Mechanics Hydraulic bolt tensioners are widely used in pressure vessel, flange face connection clamping and tightening or removing, and the main bolt tightening and removal of large diesel engines, turbines, air conditioning units, metallurgy, mining, oil and petroleum, piping, petrochemical, nuclear power plants and equipment installing, maintenance, military equipment, shipbuilding industry, locomotives, construction machinery and other bolt overall stretching and product assembly, a variety of medium-sized and large mechanical fastening nut transmission parts.Ningbo Instruments offers a wide variety of hydraulic bolt tensioners from 8mm to 1000mm, with tensioning capacity from 100Kn to tens of thousands Kn, customization service and solutions can be provided tailored to your requirements.
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Product serial number
A006
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Parameter
Parameters
Features
Application
NO. Model No. Thread Tensioning capacity Size Stroke
M Inch KN A B C D E F mm
1 TZ11HB24 M24 1 223 86 119 46 69 29 24 10
2 TZ11HB27 M27 1-1/8 223 86 119 52 76 29 27 10
3 TZ11HB30 M30 1-1/8 401 107 131 57 80 37 30 10
4 TZ11HB33 M33 1-1/4 401 107 131 62 85 37 33 10
5 TZ11HB36 M36 1-3/8 401 107 132 68 91 38 36 10
6 TZ11HB39 M39 1-1/2 401 107 135 75 93 41 39 10
7 TZ11HB42 M42 1-5/8 769 138 152 80 105 49 42 10
8 TZ11HB45 M45 1-3/4 769 138 153 85 111 50 45 10
9 TZ11HB48 M48 1-7/8 769 138 154 92 116 51 48 10
10 TZ11HB52 M52 2 769 138 155 96 120 52 52 10
11 TZ11HB56 M56 2-1/4 1467 174 170 102 136 62 56 10
12 TZ11HB60 M60 2-3/8 1467 174 171 108 142 63 60 10
13 TZ11HB64 M64 2-1/2 1467 174 172 115 150 64 64 10
14 TZ11HB68 M68 2-3/4 1467 174 173 120 154 65 68 10
15 TZ11HB72 M72 2-7/8 2262 210 192 125 158 73 72 10
16 TZ11HB76 M76 3 2262 210 193 130 174 75 76 10
17 TZ11HB80 M80 3-1/4 2262 210 195 137 178 77 80 10
18 TZ11HB85 M85 3-3/8 2486 240 197 143 158 78 85 12
19 TZ11HB90 M90 3-1/2 2486 240 200 155 174 80 90 12
20 TZ11HB95 M95 3-3/4 2486 240 205 160 178 85 95 12
21 TZ11HB100 M100 4 3958 276 210 170 158 92 100 12
22 TZ11HB105 M105 4-1/8 3958 276 220 180 174 95 105 12
23 TZ11HB110 M110 4-3/8 5860 325 230 185 275 104 110 12
24 TZ11HB115 M115 4-1/2 5860 325 240 193 285 108 115 12

 

 

 

 

 

 

 

 

 

 

 

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Advantages:

● Direct: Tensioner is applied directly to stretch the bolt, so We don't need to fight against friction or losses.

● Accurate: The applied load is controlled very accurately, because it is directly proportional to the pressure applied to the tensioner.

● Calculated: The load transfer factor is calculable, helping to give the correct residual load.

● Fast: Operation of tooling and improved accuracy reduces time required to tighten the load.

● Versatile: Tensioning allows for loading multiple fasteners in a joint at the same time, especially on the diagonal tensioning force balance to tighten simultaneously

● Reliable: Uniform bolt loading ensures a high level of accuracy by applying a consistent force.

● Stress-free: Purely axial, tensile loading ensures no torsional stresses are introduced.

 

 

Hydraulic bolt tensioner ( How it works by pictures)

State 1: Original state of bolt and nut before stretching, pay attention to the space between bolt length from top to the nut top, as you will see a clear comparison after the nut was screwed down.


State 2: The bolt tensioner is assembled on the top of the bolt, connect the bolt tensioner to a pump by a hydraulic hose.

 
State 3: Slowly operate the hydraulic pump, the hydraulic fluid power was transmitted to bolt tensioner cylinder part from the pump, exerting high pressure to pull the up level of the bolt. (Please make sure the amount of Torque you need by calculating the pressure, we have table for pressure and t torque ratio on the user manual, DO NOT OVERLOAD, it may damage your bolt, thread )

State 4: The bolt is pulled “thinner” by high pressure hydraulic force, then insert a tommy bar to the hole designed on the tensioner to screw the nut down to bottom of the bolt

State 5: Release the Pressure from the pump, and the bolt is locked tightly at the bottom of the bolt. ( WARNING: Please release the pressure from the pump first !!! DO NOT USE OTHER TOOL, i.e hammer, impact wrench to knock the tensioner, it is dangerous causing extremely high pressure oil leak, unnecessary injuries)


State 6: The nut touches the bottom of the bolt, remove the tensioner.


State 7: The bolt served as a spring, it is designed with certain tensile yield strength. When the hydraulic fluid force is released and tensioner is removed, the bolt is returned to“original thick”state, clamp and bite the nut with high tensile force.

 

 

 

Pipeline Flanges
 
Pressure Vessels
 
Valves and Pumps
 
Manways
 
Heat Exchangers
 
Diesel Engines
 
Cranes
 
Presses
 
Steam and Gas Turbines
 
Shaft Couplings
 
Coal and Rock Grinders
 
Catalyst Reactors
 
Wind Turbines
 
and so on....
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

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