Views: 0 Author: Site Editor Publish Time: 2026-04-15 Origin: Site
The 2620 series rotary union is a dual-channel rotary union specifically designed for high-speed machine tools. Its core feature is the ability to transmit two identical media (e.g., coolant and air) simultaneously within a compact unit, making it suitable for high-speed rotating components such as spindles and chucks.
The core technical advantages of the 2620 series lie in its independent dual-channel design and balanced mechanical seal, enabling low torque and long service life at high speeds.
Parameter | Typical Range | Remarks |
|---|---|---|
Number of Channels | 2 independent channels | Must be used for the same medium; cannot be used for different media |
Speed Range | 3,000 - 7,000 RPM | Upper limit varies by model |
Pressure Range | 20 - 70 Bar (approx. 2-7 MPa) | Higher pressure versions available |
Applicable Media | Coolant, air, hydraulic oil | Commonly used for spindle or chuck clamping/unclamping functions |
Temperature Range | -20℃ to 120℃ | |
Key Design Features | Balanced mechanical seal, double precision ball bearings, labyrinth seal protection | Ensures stability and seal life at high speeds |
There are two main routes for selection: original imported and domestic alternative, allowing you to choose based on budget and maintenance convenience. Mature alternatives available on the market are listed below.
Type | Brand/Manufacturer | Representative Models | Key Parameters (Pressure/Speed) | Features |
|---|---|---|---|---|
Original Import | Deublin | 2620-040-252 (Standard) | Pressure can reach ultra-high levels depending on sub-model | Globally renowned brand, performance benchmark, but higher price and longer lead time |
Domestic Alternative | Shandong Dewel | 2620 Series | 20-70 Bar / 3000-7000 RPM | Performance comparable to imported, supports custom non-standard designs |
Domestic Alternative | Shandong Jiangsheng | JS2620-000-157 | 30 Bar / 6000 RPM | Common in the market, many successful replacement cases |
Domestic Alternative | Tengzhou Chentian | CT2620-040-157 | 20 Bar / 6000 RPM | Economical choice, offers free sample requests |
Domestic Alternative | Shandong Focus Machinery (FOCUS/FUXUAN) | JD2620 Series (see details below) | ≤40 Bar / ≤7000 RPM | Specialized alternative for Deublin 2620, rich model selection, supports customization |
This series, produced by Shandong Focus Machinery Co., Ltd., is a domestic model specifically developed to replace the Deublin 2620 series. It offers a wide range of options and supports non-standard customization.
Parameter | Specification | Remarks |
|---|---|---|
Model Series | JD2620 | Fully compatible with Deublin 2620 series mounting dimensions |
Max. Speed | ≤ 7,000 RPM | Meets the requirements of most high-speed machine tool spindles |
Max. Pressure | ≤ 4 MPa (approx. 40 Bar) | Standard pressure version |
Size | Customizable | Supports OEM/ODM, optional interface threads (NPT/BSP/MPT) |
Applicable Media | Water, hydraulic oil, gas | Both channels must be the same medium |
Interface Type | Threaded / Flanged | |
Certifications | CE, ISO | CE /ODM factory audit available |
Available JD2620 Model List:
JD2620-100-252 JD2620-500-252
JD2620-000-252 JD2620-000-157
JD2620-502-940 JD2620-220-252
JD2620-040-157 JD2620-520-252
JD2620-040-252 JD2620-200-252
Selection Advice for Focus Products: Provide the thread specification (e.g., NPT 1/4", BSP 3/8") and flange dimensions of your original union to the manufacturer to confirm the matching model, and request a 2D dimensional drawing for one-to-one verification.There are three critical points to pay special attention to during selection and use:
Identical Media Required: This is the most important design limitation of the 2620 series. Both channels must transmit the same type of medium. Do not use oil in one channel and air in the other, as cross-leakage will occur as the seals wear.
Installation & Lubrication: The union is typically connected via flange or thread. There are two main lubrication methods: lubricating the gas seal via an oil cup, or using oil-air mist lubrication. If a gas seal is used, no external lubrication is required.
Multi-Union Operation: When connecting multiple unions, you should pressurize only one channel at a time, while keeping the outlets of the other channels open. This prevents cross-leakage between channels.
If you can provide the maximum spindle speed of your machine tool and the type of media used (coolant or hydraulic oil), I can help you screen for a more specific matching model.
