These fittings are manufactured from European standard brass CW617N through hot forging and precision machining, followed by annealing processes to eliminate internal stress and enhance mechanical strength. The bright nickel plating ensures corrosion resistance and maintains aesthetic appeal. Designed for PEX-AL composite pipes (e.g., S3.2 series: DN16×2.2, DN20×2.8, DN25×3.5) and applied to PEX, PERT, PB and other pipes, these fittings enable compact, reliable, and leak-proof connections in demanding environments.
Product Description
POLYGON Sliding Fittings utilize a innovative clamping mechanism where the pipe is inserted into the fitting and secured using a specialized hydraulic clamping tool. This technology eliminates the need for O-rings or additional sealing materials, relying instead on the precision-machined brass components to form a permanent, leak-proof connection. The Sliding fittings are designed with a double-seal structure that adapts to harsh working conditions, including temperature fluctuations (-20°C to 110°C) and pressure surges up to 16 bar. The product range includes reducing fittings (e.g., Φ20×16) and threaded variants (G1/2", G3/4", G1") for flexible system integration. The compact design allows for space-saving installations, while the nickel-plated surface resists discoloration and corrosion over decades of service.
Product Information
Material
Brass CW617N (hot-forged, nickel-plated)
Pressure Rating
PN16 (16 bar at 20°C)
Temperature Range
-20°C to 110°C
Compatibility
PEX-AL pipes (DN16-DN32, S3.2 series),PEX, PERT, PB
Thread Standard
ISO 228-1 (G1/2", G3/4", G1")
Certifications
CNAS tested, tensile strength ≥280 N/mm², elongation ≥10%
Product Specification
|
Fitting Type |
Dimensions (mm) |
Thread Size |
Application |
|
Coupling |
DN16, DN20, DN25 |
- |
Straight connection |
|
Reducer |
DN16x20, DN20x25, DN16x25 |
Size transition |
|
|
Male Threaded Elbow |
DN16, DN20, DN25 |
G1/2", G3/4" |
Angled threaded connection |
|
Female Threaded Union |
DN16, DN20, DN25 |
G1/2", G3/4" |
Threaded integration |
|
Six-Way Fitting |
DN20×16×16, DN20×16×20 |
- |
Multi-directional distribution |
|
Wall Plate Elbow |
DN16, DN20 |
G1/2", G3/4" |
Wall-mounted radiator connection |
|
Reducing Tee |
DN16×20×16, DN20×25×20 |
- |
Branch with size transition |
Full specification below
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Quality Control Process
Material Selection
CW617N brass verified for chemical composition and mechanical properties.
Hot Forging
800-ton pressure forging enhances grain structure and durability.
CNC Machining
Thread tolerance maintained at ±0.05 mm for leak-proof sealing.
Annealing Treatment
Stress relief at 550°C for 2 hours prevents cracking.
Pressure Testing
100% hydrostatic tested at 40 bar (2.5× PN) for 1 hour.
Surface Inspection
Nickel plating thickness verified at 15–20 μm via eddy current testing.
Performance Advantages
Double-seal mechanism ensures zero leakage under 40 bar pressure.
Maintains integrity at 110°C continuous operation.
Nickel plating withstands pH 6.5–8.5 water quality for 50+ years.
Hydraulic tool enables quick, tool-only dependent connections.
Maintains integrity at 110°C continuous operation.
Full series compatible with PEX, PE-RT, PB, and PEX-AL pipes.
Applicable Scenarios
- Radiator Heating Systems: Connections for copper-aluminum radiators and steel plate radiators.
- Wall-Hung Boiler Pipelines: Compact fittings for residential heating units.
- Solar Thermal Installations: High-temperature resistant connections for solar water heating.
- HVAC Systems: Integration with central air conditioning and heat pump systems.
- Industrial Piping: Sliding fittings Chemical and thermal fluid transport in manufacturing plants.
others
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