OVERVIEW

Official designation: Haag + Zeissler Series SJN (SJN Series, High-Performance Rotary Joint)

Role/Application: A precision swivel joint, primarily used for slow-speed rotational or pivoting movements, designed to reliably transfer fluid or gaseous media like water, steam, or oil into or out of moving machine components.

KEY SPECS SUMMARY

Power: N/A

Interfaces / Ports: Threaded connections (varies by size)

Indicators: N/A

Operating Temp: 0 to 90 degrees C (for standard fluids)

Platform / Compatibility: Stainless steel housing, ball bearing design

Limit: 200 bar (DN 15), 150 bar (DN 20), 100 bar (DN 25)

Lifecycle: Refer to the latest manufacturer manual.

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum rotational speed the SJN swivel joint series is rated for during continuous operation?

A: The SJN series is designed for low rotational speeds and pivoting movements, rated up to 1000 rpm.

Wiring & Installation:

Q: How is the sealing integrity ensured in the SJN rotary joint against media leakage?

A: The joint uses specialized PTFE additive seals pre-stressed by a built-in spring for leak-free operation, even at low pressure or vacuum.

Troubleshooting & Compatibility:

Q: What common media types are compatible with the standard SJN series seals and housing materials?

A: Standard SJN units are compatible with cold/hot water, steam, hydraulic oil, compressed air, and various non-toxic gases.

Replacement & Upgrades:

Q: What alternative Haag + Zeissler series is available for high-pressure, high-speed rotary applications above 1000 rpm?

A: For higher speeds, series like the 7400 or 7450 are typically recommended, depending on the required pressure rating.