OVERVIEW

Official designation: Haag + Zeissler Series SDF 2 (SDF 2 Series, Swivel Joint)

Role/Application: A robust, single-passage direct-flange swivel joint for low-speed swiveling motions or slow rotation, designed for large nominal diameters in industrial fluid transfer systems.

KEY SPECS SUMMARY

Power: N/A

Interfaces / Ports: Direct-flange swivel connections (DN 50 to DN 800)

Indicators: N/A

Operating Temp: Minus 20 to plus 200 degrees C

Platform / Compatibility: Steel (42CrMo4) or stainless steel (1.4571)

Limit: 40 bar max pressure, 1500 rpm max speed (varies by size)

Lifecycle: Refer to the latest manufacturer manual.

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the main sealing element used in the SDF 2 swivel joint that provides consistent performance up to 200 degrees C?

A: The main sealing component is a durable PTFE-Compound-seal, which supports the temperature and pressure limits.

Wiring & Installation:

Q: What is the significance of the "direct-flange swivel" design in the SDF 2 series joint installation?

A: The direct-flange design simplifies installation by providing flange connections for integration into pipelines without additional couplings.

Troubleshooting & Compatibility:

Q: What are the risks of operating the SDF 2 joint at maximum pressure and maximum speed simultaneously?

A: Operating parameters are interrelated; combining maximum limits requires consultation with the manufacturer to prevent premature failure.

Replacement & Upgrades:

Q: What internal feature allows the SDF 2 swivel joint to absorb external radial and axial forces?

A: Widely spaced ball guiding tracks, similar to a double-run ball bearing, are designed to absorb external bending loads and forces.