Silicone-Rubber Composite Diaphragm
Silicone-rubber composite diaphragm, FKM + silicone, chemical bonded, extreme temperature
Description
This composite diaphragm combines the chemical resistance of fluorocarbon rubber (FKM) with the temperature resistance of silicone. The two materials are chemically bonded during the molding process, creating a diaphragm that performs in aggressive chemical environments at extreme temperatures. The FKM side resists oils, fuels, and acids while the silicone side provides flexibility and low-temperature performance. Used in automotive fuel systems, chemical processing, and oil & gas applications.
Specifications
| Material | FKM + Silicone |
| Hardness | 60±5 |
| Operating Temperature | -40°C to 230°C |
| Color | Black / Brown |
| Certifications | Custom |
| MOQ | 1000 |
| Lead Time | 30 days (after approval) |
| Customization | Drawing or sample based, full dimensional report provided |
Engineering & Quality Documentation
📋 Technical Standards
- Custom material pair (FKM + silicone) specification per application
- Chemical and temperature resistance data per compound
- Fabric reinforcement for pressure duty
- Service range -40 °C to +230 °C
🏭 Manufacturing Process
FKM/silicone composite diaphragms molded with fabric reinforcement and metal center rings bonded in-cycle.
- Layer interface peel strength verified per lot
- Membrane thickness controlled to ±0.02 mm
- Compound selection per media and temperature duty
🔍 Quality Inspection
- ▸ 100% visual inspection before packing (flash, short-shot, contamination)
- ▸ Dimensional verification against approved drawing; FAI report on first shipment
- ▸ Hardness per ASTM D2240 (Shore A) on every batch
- ▸ Lot traceability: material batch and cure records logged per carton
- ▸ Layer peel strength sampling per lot
- ▸ Membrane thickness verification on FAI
- ▸ Burst / deflection sampling test
🛡️ After-sales & Warranty
12-month warranty. Compound data sheets and FAI per order; confirmed failures replaced free with 8D report.
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