This polyurethane (PU) three-part design is built to have a thicker lower cone, with a 60° angle to prevent product piling. Thick PU material is used for the top cuff. The middle section is a flat, completely horizontal section made with PU-UF03, a 0.3mm thick polyurethane sheet. PU BG CFT's ability to prevent force transfer lies in its three-part design. The flat sheet middle section has no shape memory. Because of this, vibration or movement from feeders, sifters, or receivers does not transfer to load cells and sensitive weighing or dosing equipment.
Influences transferred are measured to be well below 1 gram with this flexible connector. The flat top design has limited vertical compensation due to its membrane-like function. Customizations for this flexible connector include different thicknesses for each section, variable colors, and extension of the top and bottom cuff.
| IDA+B | Ø OD mm | CL | SESA&B |
|---|---|---|---|
| 40/1.5 | 83 | 118/4.6” | 40/1.5 |
| 114/4.5 | 157 | 118/4.6” | 40/1.5 |
| 100/4 | 143 | 118/4.6” | 40/1.5 |
| 75/3 | 118 | 118/4.6” | 40/1.5 |
| 60/2.5 | 103 | 118/4.6” | 40/1.5 |
| 50/2 | 93 | 118/4.6” | 40/1.5 |
| 120/5 | 163 | 118/4.6” | 40/1.5 |
| 140/5.5 | 183 | 118/4.6” | 40/1.5 |
| 150/6 | 193 | 118/4.6” | 40/1.5 |
| 168/6.6 | 211 | 118/4.6” | 40/1.5 |
| 200/8 | 243 | 118/4.6” | 40/1.5 |
| 219/8.6 | 262 | 118/4.6” | 40/1.5 |
| 250/10 | 293 | 118/4.6” | 40/1.5 |
| 279/11 | 321 | 118/4.6” | 40/1.5 |
| 300/12 | 343 | 118/4.6” | 40/1.5 |
| IDA+B | 40/1.5, 50/2, 60/2.5, 75/3, 100/4, 114/4.5, 120/5, 140/5.5, 150/6, 168/6.6, 200/8, 219/8.6, 250/10, 279/11, 300/12 |
|---|---|
| Ø OD mm | 103, 118, 143, 157, 163, 183, 193, 211, 243, 262, 293, 321, 343, 83, 93 |
| CL | 118/4.6” |
| SESA&B | 40/1.5 |
All polyurethane weighing bellow designs are available in a number of flexible materials. These materials can be combined together to form a 2 or 3 part fused weighing bellow. We offer transparent, blue metal detectable, white and antistatic poly urethane materials.
| Material | Thickness | Color | Flexibility | Comments |
|---|---|---|---|---|
| PU-UF03 | 0,3 mm | Transparent | ++++ | Superior flexibility, most used bellow upper |
| PU-UF07 | 0,7 mm | Transparent | +++ | Good flexibility, better pressure resistance than 0,3 |
| PU-UF1 | 1,0 mm | Transparent | ++ | Ideal for the bellow lower |
| PU-UF15 | 1,5 mm | Transparent | + | Ideal for bellow lower for more permanent shape |
| PUW1 | 1,0 mm | White (solid) | ++ | Non transparent, no translucency |
| PUMAG08 | 0,8 mm | Blue | ++ | Metal and color detectable |
All TPU films are food contact compliant according to international food contact regulations. PU-UF03, PU-UF07, PU-UF1, PU-UF15 and PU-UF3 have been migration tested for specific food contact compliancy, and comply with following regulations. Some other may only be available with a food contact compliancy declaration.
| United States Food contact safety regulations FDA 21 CFR |
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| European Food Contact safety regulations |
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| Chinese Food Contact regulations |
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| Thermoforming | All poly urethane weighing bellows are made by thermoforming 2 or 3 parts from a poly urethane sheet material. Thermoforming the poly urethane sheet material results in a shaped part that does not have any height seam. |
| High Frequency Welding | All parts are welded together with high frequency (HF) welding equipment. Our latest HF welding equipment allows for seamless welds, creating a part comparable to a casted or molded part. All polyurethane (PU) flexible materials indicated for this product can be combined together to form the weighing bellow end product. Combinations between different thicknesses can be made. When thermoforming a PU sheet, the original thickness is reduced. This thickness reduction allows for an even more flexible bellow. With the conical flat top design, the bottom section is made with thicker 1.0 or 1.5mm PU sheet materials. This extra thickness provides extra rigidity for the bottom part of the bellow designs, preventing powder or bulk piling caused by deformation when using the classic bellow design. The top part of the bellow is meant to be most flexible. The bottom cone and end connection cuffs need to be thicker for a better product flow and a good resistance to the clamp force from the coupling used to connect to the equipment. |
Polyurethane weighing bellows is one of the most customizable flexible connectors. It can be designed with the following coupling ends:
| Flexible Connectors |
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| JACOB Flexible Connections |
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| Tri-Clamp Flexible Connections |
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Depending on your system requirements, more options can be added to your PU BG CFT.
| Extended polyurethane weighing bellows | For pipes with great gaps or distance, silicone weighing bellows can be extended using the same material as the bellows. 1 or 2 sides extension |  |
| Integrated Reinforcement Rings | To withstand vacuum collapse or over pressure expansion. Stainless Steel, 3mm / 5mm / 8mm (VR) PE 6x10mm poly ethylene (VRPE) |  |
| Earthing or Grounding | Earthing or grounding provides a path for fault currents to safely flow to the earth. This feature prevents potential hazards such as electrocution and equipment damage, thus promoting a safer workplace. Earth connection on integrated Flanges with M6 Stud or Nut (A) Earth connection on integrated rings with M6 Stud or Nut (VRA) |  |
| Sleeve within a sleeve | Inside Cone / Inside Sleeve (7) for applications in explosive environments Earth connection on integrated rings with M6 Stud or Nut (VRA) |  |
| Padding on flange or cuff |
Stitched on gasket on end cuffs (VF) |  |
| Label |
RFID chip encased in Poly Urethane pocket |  |
| Pneumatic or Compressed Air Hoses | TPU compressed air hoses 8×5,5mm welded in. |  |
| Embossing | Embossed logo or marking welded in thermoplastic material |  |
The top cuff is made in 1.0mm polyurethane (standard), 1.5 mm polyurethane is optional. The bottom cone and cuff are made in 1.0mm polyurethane (standard), 1.5 mm is optional. The flat middle section is made in 0.3 mm Polyurethane. A different thickness can be used for the middle section but it would lose the most of its flexibility, making it less suitable for any precise weighing or dosing application.
The cuffs on both sides can be extended to achieve a longer total length, mostly the bottom cuff is extended. The cuffs can also be cut to length if they are longer than required, we can cut them for you, or you can do so yourselves using a pair of scissors. All sorts of thickness and color variations are possible. For instance, a 0.3 mm middle, a 1.0 mm top cuff, and a 1,5mm bottom part.
Are you curious about the product?
Filcoflex specializes in the design
and manufacture of
Poly Urethane, silicone, rubber, and textile flexible connections for bulk product transport.
