M-Series — Low-Speed Continuous Casting Rotary Unions
Embedded maintenance-free rotary unions for continuous casting machines — drop-in replacement for Z/K-series joints
Overview
The M-series is an embedded-type rotary joint built for continuous casting machines in the metallurgical industry — segment cooling circuits on slab and billet casters where the joint sits inside the machine and nobody wants to think about it again. It covers the same duty as Z-series and K-series low-speed continuous casting rotary unions and can be built to match their mounting dimensions for a drop-in swap.
The design philosophy is zero routine: oil-free bearing support removes the lubrication schedule, and a balanced sealing structure keeps the friction pair stable under the low-speed, constant-load duty of a caster. Rated 1.5 MPa / 100 °C at 100–200 rpm, media being coolant, hot or cold water.
Selection follows four parameters — medium, pressure, speed and embedded mounting dimensions. Send the machine drawing or the old joint nameplate and we confirm bore size and connections within 24 hours. Service life rides mainly on cooling-water quality: keep the strainer clean, and replace the friction pair proactively at each casting-maintenance outage rather than waiting for a leak.
A Vietnamese hydraulic-equipment manufacturer has outfitted multiple production lines with large volumes of Ruitus steel-plant joints in a single project. Standard spares ship in 3–15 days after order confirmation (MOQ 1 unit); custom builds to your mounting dimensions are scheduled per the quotation. Produced under ISO 9001:2015 and running in steel plants across 70+ countries.
Images & Dimension Drawings
Key Features
- Embedded-type design for continuous casting
- Oil-free bearing support
- Completely maintenance-free operation
- Balanced sealing structure
Typical Applications
Customer Cases
A Vietnamese hydraulic-equipment manufacturer purchased a large volume of steel-plant rotary joints from Ruitus for blast-furnace and continuous-casting service, outfitting multiple production lines in a single project.
Customer names are anonymized for confidentiality.
Operating Conditions
| Media | Coolant, hot water, cold water |
|---|---|
| Max Pressure | 1.5 MPa |
| Max Temperature | 100°C |
| Speed Range | 100 – 200 rpm |
Frequently Asked Questions
1 How do I select a rotary joint for a continuous casting machine?
2 Do you supply Z-series or K-series low-speed continuous casting rotary unions?
3 Does the M-series joint really need no maintenance?
4 What cooling-water quality does the M-series need?
5 What are the lead time and support during a casting-maintenance outage?
Send Us Your Drawing or Duty Conditions
Tell us the medium, temperature, pressure, speed and connection size. Our engineers reply with a selection or a custom proposal — usually within one working day.