NORMACLAMP® S/SP
Sealing clamps (NORMACLAMP® S) to DIN 3017
Retaining clamps (NORMACLAMP® SP) to DIN 3016
Thanks to their robust clamping brackets with metric bolts the clamping force offered by NORMACLAMP® S/SP is very high. We recommend the two-part version for applications submitted to extreme pressure and tensile loads. Starting from 9mm band width all clamps can be supplied with an additional vibration damping rubber profile (GU) which also protects the joint against creeping water (NORMACLAMP® SPGU).
Materials
| W1* | W2 | W3 | W4 | W5 |
| X | X** | X |
*No Chromium VI for surface treatment
**For band width 30 on demand
Bolts
|
Zy |
Sz |
Sk | |
| Band width 5 |
X |
||
| Band width 7 |
X |
||
| Band width 9 |
X |
||
| Band width 12 |
X |
||
| Band width 15 |
X |
||
| Band width 20 |
X |
||
| Band width 25 |
X | ||
| Band width 30 |
X |

Rubber profiles
For the profile type (a or b) and the material (Silicone or EPDM) available for each clamp please refer to the table giving a summary of sizes for "clamps with rubber profile".
B = Width of clamp
b1= Width in mm
S2 = Material thickness in mm
Rubber Materials | |||
| Properties | Polychloropren | Silicon | EPDM |
| Tensile strenght N/mm² | 10 | 8,5 | 7 |
| Breaking elongation in % | 200 | 420 | 350 |
| Shore Hardness A | 70 +- 5 | 70 +- 5 | 70 +- 5 |
| Temperature - °C | -35° to +100° | -60° to +170° | -40° to +120° |
| Resistance to weather & ozon | very good | good | very good |
| Resistance to ageing & sund cracks | very good | very good | very good |
| Resistance : | |||
| Petrol | adequate | average | not resistant |
| Oils & greases | good | good | not resistant |
| Acids | good | good | good |
| Alkalis | good | mäßig | good |
| Alkalien | good | mäßig | good |
Corrosion resistance of TORRO® materials
| Material | Corrosion resistance in salt spray testing |
| W1 | Min. 144 h |
| W4 | Min. 240 h |
| W5 | Min. 400 h |
* Max. 10% corrosion of base material admissible, however min. 144 h without Fe corrosion required

