NORMACLAMP® - Hose Clamps
NORMACLAMP® TORRO® -
Since we are continuously working to improve its features
Worm Drive Hose Clips
this clip is still setting standards for modern hose clip design.
to DIN 3017
The distinguishing feature of the NORMACLAMP® TORRO® is
NORMACLAMP® TORRO® hose clips are specially
the asymmetrical construction which tells you at first sight
suitable for applications under high mechanical loads.
whether it is a genuine TORRO® or not.
Short description of technical features
1
4
5
2
3
6
1
Improved asymmetric housing = even distribution of forces
4
Asymmetric extension = prevents the housing from tilting
and safe assembly
over when the clamp is tightened
2
Screw support = Ease of assembly due to the safe
5
Short housing saddle = even contact pressure = improved
guidance of the emerging band end
efficiency
3
Material and clamping range stamped on the band
6
Smooth or stamped inside of band = optimal hose
= prevention of errors
protection
Materials
W1*
W2*
W3
W4
W5
x
x
x
x
x
* No chromium VI used for the coating of the closure components
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NORMACLAMP® - Hose Clamps
Types of clamp band
Band width 9 mm
• W1 with smooth inside
• W2, W3, W4, W5 with stamped inside
Band width 12 mm
• W1, W2, W3 with smooth inside
• W4, W5 with stamped inside
Screw
W1
W2
W3
W4
W5
Phillips head
SW 7*
•
•
Slotted head
SW 7**
•
•
•
* Band width 7.5 mm = SW 6
** Band width 16 mm = SW 8
The advantages at a glance
• Multi-range hose clamp
• Material: W1, W2, W3, W4, W5
• Chromium VI free: compliant with ROHS, WEEE and ELV Environmental Directives
• Clamping ranges to DIN 3017: 8 - 16 mm up to 140 - 160 mm
• Larger diameters on demand
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NORMACLAMP® - Hose Clamps
Technical features
High band tensile force and
high fracture torque
As always, the new NORMACLAMP® TORRO® features high tensile
forces. However, when compared with competitor’s products
and the previous model, we now achieve significantly higher
fracture torques. This provides for an increased assembly reliability.
Even clamping force distribution
Thanks to its enhanced technical design, the new
NORMACLAMP® TORRO® range delivers an even distribution
of clamping force. The clamp sits perfectly on the hose and
ensures the optimal sealing of the connection.
Corrosion resistance
Material
Corrosion resistance in salt spray testing
W1
Min. 144 h
W2
Min.
72 h
W3
Min. 200 h*
W4
Min. 240 h
W5
Min. 400 h
* Max 10% corrosion of the base material allowed
Applications
• Cooling water lines
• Depressurized as well as pressurized fuel lines and vent lines
• Oil lines
• Connections in sanitary installations
• Connections in engine construction
• Connections in the white goods industry
• Hose connections in commercial vehicles industries
15
NORMACLAMP® - Hose Clamps
Table with torques
TORRO 9 W1
Diameter (mm)
8-12
10-16
12-18
12-22
16-27
20-32
25-40
30-45
35-50
40-60
AD
2.5 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
LD max
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
PD
3.3
4
4
4
4
4
4
4
4
4
BD min
4
4.5
4.5
4.5
4.5
4.5
6
6
6
6
TORRO 9 W2
Diameter (mm)
8-16
12-22
16-27
20-32
25-40
30-45
35-50
40-60
AD
2 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
LD max
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
PD
2.6
4
4
4
4
4
4
4
BD min
4
4.5
4.5
4.5
4.5
4.5
4.5
4.5
TORRO 9 W3-W5
Diameter (mm)
8-16
12-22
16-27
20-32
25-40
30-45
35-50
40-60
AD
2 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
LD max
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
PD
2.6
4
4
4
4
4
4
4
BD min
4
4.5
4.5
4.5
4.5
4.5
4.5
4.5
TORRO 12 W1
Diameter (mm)
16-27
20-32
25-40
30-45
35-50
40-60
AD
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
LD max
1.2
1.2
1.2
1.2
1.2
1.2
PD
6.5
6.5
6.5
6.5
6.5
6.5
BD min
10
10
10
10
10
10
TORRO 12 W2/W3
Diameter (mm)
16-27
20-32
25-40
30-45
35-50
40-60
AD
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
LD max
1
1
1
1
1
1
PD
6.5
6.5
6.5
6.5
6.5
6.5
BD min
8.0
8.0
8.5
8.5
8.5
8.5
TORRO 12 W4/W5
Diameter (mm)
16-27
20-32
25-40
30-45
35-50
40-60
AD
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
LD max
1
1
1
1
1
1
PD
6.5
6.5
6.5
6.5
6.5
6.5
BD min
8
8
8.5
8.5
8.5
8.5
Legend:
AD = recommended tightening torque in Nm;
LD = no-load torque in Nm;
PD = test torque in Nm;
BD = fracture torque in Nm
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NORMACLAMP® - Hose Clamps
TORRO 9 W1
50-70
60-80
70-90
80-100
90-110
100-120
110-130
120-140
130-150
140-160
Diameter (mm)
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
AD
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
LD max
4
4
4
4
4
4
4
4
4
4
PD
6
6
6
6
6
6
6
6
6
6
BD min
TORRO 9 W2
50-70
60-80
70-90
80-100
90-110
100-120
110-130
120-140
130-150
140-160
Diameter (mm)
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
AD
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
LD max
4
4
4
4
4
4
4
4
4
4
PD
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
BD min
TORRO 9 W3-W5
50-70
60-80
70-90
80-100
90-110
100-120
110-130
120-140
130-150
140-160
Diameter (mm)
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
3 +0.5
AD
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
LD max
4
4
4
4
4
4
4
4
4
4
PD
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
BD min
TORRO 12 W1
50-70
60-80
70-90
80-100
90-110
100-120
110-130
120-140
130-150
140-160
Diameter (mm)
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
AD
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
LD max
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
PD
10
10
10
10
10
10
10
10
10
10
BD min
TORRO 12 W2/W3
50-70
60-80
70-90
80-100
90-110
100-120
110-130
120-140
130-150
140-160
Diameter (mm)
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
AD
1
1
1
1
1
1
1
1
1
1
LD max
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
PD
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
BD min
TORRO 12 W4/W5
50-70
60-80
70-90
80-100
90-110
100-120
110-130
120-140
130-150
140-160
Diameter (mm)
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
5 +0.5
AD
1
1
1
1
1
1
1
1
1
1
LD max
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
PD
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
BD min
17
NORMACLAMP® - Hose Clamps
Survey of sizes, band widths & materials
NORMACLAMP® TORRO®
18
NORMACLAMP® - Hose Clamps
19
NORMACLAMP® - Hose Clamps
Survey of sizes, band widths & materials
NORMACLAMP® TORRO® WF
20
NORMACLAMP® - Hose Clamps
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NORMACLAMP® - Hose Clamps
NORMACLAMP® TORRO®
The TORRO® modular system offers several accessories that
Modular System
can be added to the clip, in order to modify its technical charac-
teristics. You are free to combine two or more of these accesso-
ries according to your requirements.
The Notch
The notch is a clever means for pre-positioning the TORRO® hose
clip on the hose. In this case the oval hole in the clamp band
finds its exact counter part on the hose surface. Thus the
TORRO® is safely and accurately kept in place prior to the final
assembly.
Advantage:
• Safe pre-assembly on the hose.
The Clip
With this accessory the TORRO® can also be pre-positioned on
the hose. The two ‘teeth’ of this device keep the TORRO® hose
clip safely in place if it needs to be stocked or transported prior
to its final assembly.
Advantage:
• Safe pre-assembly on the hose
23
NORMACLAMP® - Hose Clamps
The Spring insert
For this version of the NORMACLAMP® TORRO® the standard
hose clip is equipped with a spring insert on the inside of the clip
band. When tightening the screw the spring is loaded and stores
sufficient clamping force to ensure a long-lasting automatic
re-tensioning effect. Thus the radial clamping force achieved
will be sufficient even under extremely low temperatures. There-
fore, the TORRO® is an optimal solution for applications under
extreme temperature changes.
Advantages:
• Automatic re-tensioning effect in the event of hose relaxation
• Increased sealing reliability across a wide temperature range
The Torque Cap
The torque cap cuts off when the permissible torque is reached
and thus saves the need for a torque wrench. Even without the
cap the hose clip still remains adjustable and can be disassem-
bled and/or retightened if necessary.
Advantages:
• Defined tightening torque without special tool
• Visual assembly control
TORRO® pre-positioned using the clip
24
NORMACLAMP® - Hose Clamps
The Safety Collar
The safety collar is an assembly aid consisting of a plastic collar
that is easily fixed on the screw head. It prevents the screwdriver
from slipping off the screw head thus making the assembly
much easier. The safety collar matches our standard screw head
size 7.
Advantage:
• The screwdriver is kept from slipping off the screw head
during assembly
The Thumbsrew
The NORMACLAMP® TORRO® thumbscrew
is easily tightened by hand.
Advantage:
• The TORRO® hose clip can be manually tightened and opened
The Safety-Cap
The NORMACLAMP® TORRO® safety cap is used to prevent in-
juries during assembly work. The small plastic cap covering the
end of the clamp band is one of our contributions to prevent
accidents.
Advantage:
• The NORMACLAMP® TORRO® safety cap is available to fit the
band width 9 mm and 12 mm
Please make sure that the NORMACLAMP® TORRO® accessory you wish to order is suitable for your application.
25
