CANVAS / CHEVRON SEALS
Canvas and Chevron seals are used in heavy-duty hydraulic applications. Chevron seals consist of a stack of multiple sealing elements that adjust to pressure variations. Canvas seals, made from rubber-coated fabric, offer enhanced pressure resistance. These seals are widely used in press machines, earth-moving equipment, and mining systems. Bright Star offers customized V-packings and fabric-reinforced seals for high-pressure systems needing excellent flexibility and sealing capability
Polymers:
BRIGHT STAR has successfully developed formulations and rubber components based on the following polymers and has been supplying to diverse industries over the past few decades.
- FFKM/ Perfluoroelastomer
- FKM / Viton ®
- TFE/P/Aflas ®
- Silicone, Flurosilicone
- Nitrile (NBR), Carboxylated
- NBR (XNBR) / PVC Nitrile
- SBR
- EPDM, EPR
- Chloroprene / Neoprene®
- Natural / PLC / Polyisoprene
- Polyurethane
| MATERIAL | HARDNESS RANGE (SHORE A) | HIGH TEMP °C | LOW TEMP °C | STEAM |
| FFKM | 70-90 | 300 | -10 | E |
| FKM (VITON) | 50-90 | 230 | -20 | F-G |
| AFLAS | 60-90 | 200 | -10 | E |
| NBR | 20-95 | 100 | -30 | F-G |
| HNBR | 50-95 | 150 | -40 | G |
| SBR | 40-90 | 100 | -40 | P |
| EPDM | 40-90 | 150 | -40 | E |
| SILICONE | 20-80 | 200 | -60 | F-G |
| NR | 30-90 | 70 | -50 | P |
| CR | 40-90 | 100 | -40 | F |
Rating
- E = Excellent – Suitable for prolonged exposure to saturated steam at high temperatures
- G = Good – Suitable for moderate steam exposure with some limitations
- F = Fair – Can handle light or intermittent steam but not continuous service
- P = Poor – Degrades quickly in steam; not recommended
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Rubber diaphragms are flexible membranes used to separate two chambers while transferring pressure or movement. Commonly found in pumps, valves, and regulators, they must offer consistent elasticity and chemical resistance. Bright Star manufactures diaphragms for precise performance and long service life. Our diaphragms are engineered for dynamic response, low permeation, and resistance to aggressive media such as acids, solvents, and gases.
