Rubber Ring Connection Pipe Fittings
- Material options: Cast carbon steel, stainless steel 304, stainless steel 316 for corrosive or hygienic environments.
- Size range: Special tube diameters and thread sizes manufactured according to drawings or project specifications.
- Service flexibility: Compatible with a wide range of fluids, including hydraulic oils, water-glycol and compressed air.
- Seal selection: NBR, FKM, EPDM or other elastomers matched to medium, temperature and certification needs.
- Thread standards: BSPP, BSPT, NPT, metric, UN/UNF or customer-specified thread forms.
Technical Specifications
| Item | Specification |
| Body material | Cast carbon steel (zinc-nickel plated) or stainless steel 304 / 316 |
| Seal material | NBR (–20 °C to +100 °C); optional FKM (–15 °C to +200 °C) |
| Tube outside diameter | 6 mm – 42 mm |
| Thread size range | 1/8″ – 1½” |
| Pressure rating (CS body) | Up to 31.5 MPa / 315 bar at 20 °C |
| Pressure rating (SS body) | Up to 25 MPa / 250 bar at 20 °C |
| Connection forms | Straight, 45°/90° elbow, tee, cross, bulkhead, adapter |
| Thread standards | BSPP, BSPT, NPT, metric, UNF (other standards on request) |
| Surface protection (CS) | Zinc-nickel plating ≥ 8 μm |
| Temperature range (NBR) | –20 °C to +100 °C |
| Temperature range (FKM) | –15 °C to +200 °C |
| Leak test | 100% hydraulic or air pressure test per batch |
| Packaging | Poly bags + cartons, 20–25 kg per carton, palletized for export |
Applications
- Hydraulic power units and mobile hydraulic equipment
- Industrial machinery lubrication and cooling circuits
- Pneumatic lines for automation and air tools
- Water-glycol and coolant systems in HVAC and refrigeration
- Test benches and laboratory fluid circuits
- General industrial fluid transfer where reliable, serviceable joints are required