1. Material and General Characteristics

The fittings are primarily made from heat-stabilized grey polyamide 6.6 (PA 6.6), suitable for pneumatic tubing systems but not recommended for direct sunlight exposure. They operate at a nominal pressure of 10 bar at 20°C with a safety factor of 3, and function within a temperature range of -40°C to +80°C. These fittings are compatible with brass, steel, and stainless steel components. Tubes used should have precise tolerances, clean surfaces, and uniform wall thickness, typically 1 mm or 1.5 mm.

2. Product Range and Types

The document catalogs a broad range of plastic tube unions and fittings, each identified by specific SO numbers. Key product types include compression ferrules, plugs, hexagon and knurled nuts, straight unions, male and female adaptor unions (some with O-ring seals), tube stubs, reducing port connectors, panel mount unions, adjustable male adaptors, reduced unions, elbow unions (including adjustable and panel mount variants), tee unions (including adjustable and male adaptor types), and various banjo fittings (single, double, with throttle valves, and with non-return valves).

3. Technical Specifications and Dimensions

Each fitting type is detailed with precise dimensional data such as tube outside diameter, thread sizes (BSP, NPT), wrench sizes, installed lengths, minimum bore diameters, and weights per batch. Variants accommodate tubes with 1 mm or 1.5 mm wall thickness. Examples include compression ferrules for tube diameters 6 to 12 mm and male adaptor unions with BSP or NPT threads ranging from 1/8" to 1/2".

4. Special Treatments and Optional Services

• Pre-coated threads with PTFE tape or Loctite 5061 for enhanced sealing.
• Special cleaning (degreased) and silicone-free treatments.
• Oxygen service-specific treatments.
• Optional components such as hose nipples, adapters, distributor elements, and valves/shut-off valves.

5. Installation and Sealing Recommendations

• Use tubes with clean surfaces and consistent wall thickness for reliable connections.
• Male threads should be sealed using the recommended "Plasto-Joint" AC 833 sealing stick to ensure leak-tight joints.
• Fittings are designed for easy and fast assembly.

6. Pressure and Temperature Performance

The pressure rating varies with temperature: full nominal pressure (10 bar) is maintained from -40°C to +20°C; at +40°C, pressure capacity reduces to 75%; at +60°C to 60%; and at +80°C (brief periods) to 50% of nominal pressure.

7. Functional Features and Usage Recommendations

• Adjustable fittings allow separate screwing and alignment, facilitating easier installation and precise positioning.
• O-Ring seals (made from FPM or NBR) ensure leak-tight connections tailored to application needs.
• Throttle valves integrated in banjo fittings regulate airflow bidirectionally, with spindle fixation via counter-nuts to prevent vibration-induced adjustments.
• Reductions enable adaptation to different pipe sizes, enhancing system compatibility.
• Panel mount elbow unions simplify installation through panels with improved adjustability.

8. Standards and Norms

The fittings use standard pipe thread types including BSP (both straight 'G' and tapered 'R') and NPT threads. While explicit standard numbers are not cited, the document aligns with typical industrial norms for pneumatic fittings.

9. Data Tables and Dimensional References

Comprehensive tables provide detailed dimensional data for each fitting type, including type codes, thread sizes, key dimensions (outside diameter, installed length, minimum bore, wrench sizes), weights, and flow coefficients for throttle valves. These serve as essential references for selecting appropriate fittings based on size, thread type, and functional requirements.

10. Material and Construction Notes

• Polyamide 6.6 is used for main bodies and nuts, offering strength and chemical resistance.
• O-Rings are made from FPM or NBR depending on sealing requirements.
• Valve components such as hollow screws and inserts are brass for durability and corrosion resistance.

11. Installation and Maintenance Recommendations

• Use "Plasto-Joint" AC 833 sealing stick for male thread sealing.
• Adjustable fittings reduce assembly time and improve reliability through easier alignment.
• Spindle fixation with counter-nuts on throttle valves prevents unintentional adjustments caused by vibration.

12. Limitations and Special Notes

• Pipe wall thickness is generally 1 mm; some fittings accommodate 1.5 mm thickness.
• Flow regulation valves are designed specifically for air flow control; suitability for other fluids requires verification.
• Weight and dimension data are critical for ensuring compatibility and mechanical support.

13. Technical Specifications Summary

• Wall thickness standardized at 1.5 mm for structural integrity.
• Minimum bore diameter ('e') is a critical parameter for flow and fit.
• Thread type 'G' denotes straight BSP pipe threads, ensuring compatibility with BSP threaded fittings.

Summary

This document serves as a detailed technical catalog and specification guide for plastic PA 6.6 tube unions and fittings used in pneumatic systems. It emphasizes material properties, dimensional data, product variety, functional features such as adjustable fittings and integrated valves, installation and sealing recommendations, and performance parameters under varying temperature and pressure conditions. The comprehensive data supports engineers and technicians in selecting, installing, and maintaining reliable, safe pneumatic connections with appropriate sealing and flow control capabilities.