OVERVIEW

Official designation: Haag + Zeissler 7201 (7201 Series, Rotary Joint)

Role/Application: Single-passage stainless steel rotary joint designed for efficient water transfer in cooling systems and rotating equipment, offering high-speed capability and precision sealing.

KEY SPECS SUMMARY

Power: N/A

Interfaces / Ports: Single flow; ISO 228 (BSPP) or NPT thread

Indicators: N/A

Operating Temp: Maximum 130 degrees C for water

Platform / Compatibility: Stainless steel housing (for water and food industry)

Limit: 50 bar maximum pressure (DN 8-DN 40); 3500 rpm maximum speed (DN 8-DN 20)

Lifecycle: Refer to the latest manufacturer manual.

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum rotational speed supported for the largest connection size of DN 50 in the 7201 series?

A: The DN 50 (2 inch) connection size supports a maximum speed of 750 rpm.

Wiring & Installation:

Q: What thread standards are available for the rotor and stationary connections on the 7201 rotary joint?

A: ISO 228 (BSPP) is standard, with NPT or metric threads available on request.

Troubleshooting & Compatibility:

Q: What is the primary construction material for the 7201 series rotary union housing?

A: The 7201 rotary joint is constructed with stainless steel, making it suitable for water and food industry uses.

Replacement & Upgrades:

Q: Are two-passage rotary joints available from the manufacturer for water applications?

A: Yes, the manufacturer offers other series such as the 7101 and 7900 which feature a two-passage design.