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Tentec
Nuts replace existing hexagon nuts to give a rapid, accurate
and uniform Bolt load to any bolted joint. The Tentec
Nut offers a method of bolt tensioning multi-bolt applications
which greatly improves the integrity of the joint. The
speed in which joints can be tensioned and detensioned
shows an extraordinary time saving over conventional detachable
bolt tensioning systems. An existing Oil company user
of Tentec Nuts has recently reported a massive time saving
of 1750% over there old bolt tensioning system
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the
principle
Hydraulic
pressure is applied simultaneously to each Tentec Nut.
All frictional factors connected with conventional bolt
tightening methods are alleviated since Tentec Nuts apply
a direct axial force to the bolt which generates a bolt
elongation. This elongation/tension is permanently retained
by means of the Load retaining Collar. Tentec Nuts have
been designed to be as compact as possible, in order to
allow adjacent fitment on as many applications
as possible. In most cases they are designed to produce
a residual bolt stress of 45000 lbs/In2 (310N/mm2) which
is more than adequate for most bolted joint applications.
As pressure is applied to the Tentec Nuts not only does
the bolt elongate but also joint compression occurs. Since
many applications incorporate some form of gasket, this
joint compression can be substantial, in order to withstand
this joint compression all Tentec Nuts are capable of
considerable piston movement. This allows the tentec Nuts,
in most cases, the ability to tension a complete joint
in only one pressurisation sequence, this can result in
extremely high time savings.
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standard
range data
| PART
No.METRIC |
THREAD
In |
MM |
PART
No
IMPERIAL |
FORCE |
O |
H |
S |
| kn |
Tons |
mm |
mm |
mm |
| TCHN:0022 |
7/8 |
M
22 |
TCHN:0875 |
190 |
19.1 |
57 |
40 |
5 |
| TCHN:0024 |
1
|
M
24 |
TCHN:1000 |
205 |
20.6 |
59 |
44 |
5 |
| TCHN:0027 |
1
1/8 |
M
27 |
TCHN:1125 |
220 |
22.1 |
63 |
46 |
5 |
| TCHN:0033 |
1
1/4 |
M
33 |
TCHN:1250 |
265 |
26.6 |
68 |
48 |
5 |
| TCHN:0036 |
1
1/8 |
M
36 |
TCHN:1375 |
325 |
32.6 |
73 |
52 |
6 |
| TCHN:0039 |
1
1/2 |
M
39 |
TCHN:1500 |
373 |
37.5 |
79 |
56 |
6 |
| TCHN:0042 |
1
5/8 |
M
42 |
TCHN:1625 |
424 |
42.6 |
84 |
58 |
6 |
| TCHN:0045 |
1
3/4 |
M
45 |
TCHN:1750 |
445 |
44.6 |
87 |
60 |
6 |
| TCHN:0048 |
1
7/8 |
M
48 |
TCHN:1875 |
523 |
52.5 |
94 |
64 |
6 |
| TCHN:0052 |
2 |
M
52 |
TCHN:2000 |
629 |
63.1 |
103 |
72 |
8 |
| TCHN:0056 |
2
1/4 |
M
56 |
TCHN:2250 |
781 |
78.3 |
112 |
75 |
8 |
| TCHN:0064 |
2
1/2 |
M
64 |
TCHN:2500 |
941 |
94.4 |
124 |
81 |
8 |
| TCHN:0068 |
2
3/4 |
M
68 |
TCHN:2750 |
1042 |
104.5 |
133 |
89 |
8 |
| TCHN:0072 |
3 |
M
72 |
TCHN:3000 |
1246 |
125.1 |
144 |
96 |
10 |
| TCHN:0080 |
3
1/4 |
M
80 |
TCHN:3250 |
1607 |
161.3 |
160 |
104 |
10 |
| TCHN:0090 |
3
1/2 |
M
90 |
TCHN:3500 |
2027 |
203.4 |
178 |
114 |
10 |
| TCHN:0095 |
3
3/4 |
M
95 |
TCHN:3750 |
2160 |
216.7 |
184 |
117 |
10 |
| TCHN:0100 |
4 |
M
100 |
TCHN:4000 |
2466 |
247.5 |
200 |
126 |
15 |
| TCHN:0110 |
4
1/2 |
M
110 |
TCHN:4500 |
2814 |
282.4 |
216 |
138 |
15 |
| TCHN:0125 |
5 |
M
125 |
TCHN:5000 |
3820 |
383.4 |
245 |
150 |
15 |
| TCHN:0140 |
5
1/2 |
M
140 |
TCHN:5500 |
4954 |
497.1 |
274 |
168 |
15 |
| TCHN:0150 |
6 |
M
150 |
TCHN:6000 |
5655 |
567.5 |
294 |
174 |
15 |
| MAXIMUM
PRESSURE |
33,000
PSI/2275 bar |
features
Standard
Tentec Hydraulic Nuts are suitable for use in temperatures
up to 100ºc. For temperatures above this level special
seals are available, contact Tentec for further details
The
use of machine cut Polyurethene seal, ensure a reliable
leak free Tensioning system
Tentec
Nut protection caps are available to protect against corrosion
Tentec
Nuts can be used with Spherical washers where joint members
are badly out of square
Where
the standard Tentec Nuts are not suitable, special designs
are available on request
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