Silicone Weighing Bellows Antistatic Black (SIL WB B)

  • Very good vibration tolerance
  • Reaction force accuracy 8/10
  • Food safe; FDA & EC compliant
  • ATEX compliant
  • Vibration
  • ATEX
  • Weighing & Dosing
  • Hoseclamp Fitted

Made from a base material 60° Shore A silicone compounded with carbon to create an electrostatically conductive product. Silicone Weighing Bellows  Black Conductive has low resistance and enables electric charges to move across its surface and into the ground rapidly. This property is important in applications where static electricity can pose a risk.

SIL WB B is ideal for systems with high capacity flow rate or rapid air velocity. The classic round bellow shape design prevents force transfer. As a result, precise weighing results in systems involving dosing equipment, gravimetric feeders, and loss-in-weight feeders can be achieved.

MaterialLengthDiameter
Silicone Antistatic Black9075
Silicone Antistatic Black90100
Silicone Antistatic Black90114
Silicone Antistatic Black90150
Silicone Antistatic Black90200
Silicone Antistatic Black90250
Silicone Antistatic Black90300
Silicone Antistatic Black9060
Property Specification
Material Silicone
Color Opaque Black
Wall Thickness 1 mm (single arch bellows) / 2 mm (straight end sleeves)
Finish Matte (*except DN300)
Hardness (Shore A) 60° (±5° tolerance) — ISO 48-4:2018 / DIN ISO 7619-1 compliant
Surface Roughness (Inside End) ± 0.80 Ra
Surface Roughness (Inside Bellows) ± 0.70 Ra
Surface Roughness (Outside End) ± 0.80 Ra
Surface Roughness (Outside Bellows) ± 0.70 Ra
Elongation to Failure 240%
Breathable No
Air-tight Yes
Dust-tight Yes
Property Specification
Operating Temperature -60 °C to 200 °C | 76 °F to 392 °F
Maximum Surge Temperature 220 °C | 428 °F
Low Temperature Flexibility Very good
Pressure Resistance Only for atmospheric applications
Volume Resistivity (Ω·cm) 3 × 10¹⁵
Oscillation No
Vibration Yes
Compression No
Property Specification
ATEX Rating Safe to use in ATEX Zone 20,21,22 strictly for lengths <100mm and Minimum Ignition Energies (MIE) >1mJ.
Limitations Not for use in case of flammable gases and vapors, hybrid flammable gas/vapor/dust-air mixtures and in case of dusts with Minimum Ignition Energies (MIE) <1 mJ
Additional Information Consult this product’s explosion safety report for more details
Property Specification
Available with Stainless Steel Rings No
Available with Plastic Rings No
Available as Tool Release Standard (with Filcoflex accessories)
Available as One-Ended Connector No
Quick Access Port Option No
Accessories KLB20 Hoseclamp
Marking and Identification No
Earthing and Grounding No

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