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
Production Process
Our precision casting production process integrates wax modeling, automated shell making, controlled pouring, heat treatment, and machining to ensure dimensional accuracy, integrity, and quality.
Wax Injection
Shell Making
Shell Baking
Pouring
Shot Blasting
Heat Treatment
Machining
Inspection
Advanced Workshop
Advanced workshops include wax model production, CNC robotic shell making, semi-automatic pouring, baking furnaces, and machining centers supporting automation, efficiency, flexibility, and operations.
Medium Temperature Wax Workshop
Low Temperature Wax Workshop
9-axles CNC Shell-making Robot Arm Workshop
Semi-auto Pouring Machine
Baking Furnace
Horizontal CNC Machining Center
New Shell Making Automation Line
New shell making automation line optimizes reduction processes, improves production efficiency, ensures reliable equipment operation, extends running time, and significantly reduces labor intensity overall.
Shell Making Automation Line No. 01 – Small & Medium Parts
Automated shell making line for small and medium castings improves shell uniformity, reduces manual intervention, and enhances production stability and efficiency.
Shell Making Automation Line No. 02 – Large Parts
Specialized automation line supports large investment castings, handling complex geometries and higher weights while maintaining shell strength and process reliability.
Shell Making Automation Line No. 03 – Investment Casting
Optimized shell making system streamlines reduction processes, improves efficiency, ensures long-term equipment reliability, and significantly reduces labor intensity.
Quality Inspection
Comprehensive quality inspection system covering materials, processes, dimensions, and final products to ensure traceability, consistency, and full compliance with customer specifications.
Zeiss CMM Machine
X-ray Flaw Detector
100T Horizontal Tensile Testing Machine
Rockwell Hardness Standard Machine
Logistics & Delivery
Monthly Capacity: 500–1000 tons.
Packing: Wooden crates, steel frames, or per client request.
Shipment: By Sea (recommended, saves cost for forging parts) / By Air (fast but expensive).
Payment Terms: 30% deposit with balance via B/L copy; or 100% L/C at sight.
Delivery Terms: FOB, CIF, CNF.