RT-DE Series — Rotary Joint for Water/Coolant
Direct interchange with 55-57 series, forged brass housing
Overview
The RT-DE series is a direct alternative to imported 55-57 series rotary joints (DSTI / Deublin class) used on CNC machine tools and high-speed spindles. It keeps the original mounting interface, so replacement is a drop-in swap, and it is available in single-passage and dual-passage designs with self-supported or bearing-supported rotors to match the original configuration.
The sealing system is a balanced mechanical seal with an optional silicon carbide pair for abrasive coolants. The housing is forged brass for strength and heat dissipation, the rotor is stainless steel, and three drain ports give leak water a safe exit path — a small detail that keeps automated lines running clean. Rated 1.6 MPa / 120 °C at speeds up to 5,500 rpm for coolant, hot and cold water, oil, compressed air and low-pressure steam.
Selecting a replacement takes one photo and two dimensions: send the nameplate photo plus mounting and connection dimensions, and we confirm drop-in compatibility within 24 hours. Choose dual-passage when the spindle needs two independent circuits (for example through-spindle coolant plus outer flush); choose bearing-supported rotors for the highest speeds. Standard threads and port sizes cover the common 55-57 range.
Field results back the switch — a Vietnamese packaging plant reorders 3–5 times a year after moving from Deublin 55, and an Indian belt manufacturer has already reordered three times. Standard units ship in 3–15 days with a minimum order of 1 unit, priced as a fraction of the imported original. Send your nameplate photo for a firm quotation.
Images & Dimension Drawings
Key Features
- Direct interchange with imported 55-57 series
- Forged brass housing, stainless steel rotor
- Balanced mechanical seal with SiC option
- 3 drain ports, single or dual passage
Typical Applications
Customer Cases
A subsidiary of a major international packaging group in Vietnam replaced its Deublin 55 series joints with Ruitus RT-DE equivalents across its production lines. The switch cut joint costs dramatically with no loss in service life — the plant now reorders 3–5 times per year as standard maintenance stock.
A leading Indian industrial-belt manufacturer adopted the same RT-DE replacement joints and has already reordered three times, standardising on Ruitus for its plant maintenance programme.
Customer names are anonymized for confidentiality.
Operating Conditions
| Media | Coolant, hot water, cold water, oil, compressed air, low-pressure steam |
|---|---|
| Max Pressure | 1.6 MPa |
| Max Temperature | 120°C |
| Speed Range | Up to 5,500 rpm |
Frequently Asked Questions
1 Which imported rotary joints can the RT-DE series replace?
2 What are the operating limits and seal options of the RT-DE?
3 How do I choose between single-passage and dual-passage RT-DE?
4 What is the difference between self-supported and bearing-supported rotors?
5 What are the lead time and minimum order quantity for RT-DE?
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.