CB-10125 Ultra High-Pressure Hydraulic Coupling | Compact,
Valve-Free Design (250 MPa)
The CB-10125 hydraulic quick coupling is purpose-built for ultra high-pressure systems operating up to 250 MPa (36,250 PSI). With a valveless plug, metal-to-metal seal, and compact G1/4" thread configuration, it’s a trusted choice for hydraulic bolt tensioners, bearing pullers, and other equipment used in precision high-force applications.
This model is part of Carterberg’s CEJN 125-compatible series and
offers seamless, leak-free connection and disconnection, even under
extreme load. Its CMS metal seal (120° cone) ensures safety and repeatability across frequent cycles.
Key Features & Benefits
• Rated for 250 MPa Working Pressure
Built to handle extreme hydraulic forces in controlled tooling and
testing systems.
• Compact Dimensions
Total length of just 73.8 mm and 30 mm outer diameter — ideal for confined assembly spaces.
• No Valve on Plug Side
Simplified internal structure minimizes pressure drop and
facilitates faster pressure equalization.
• Secure CMS Metal-to-Metal Sealing
Eliminates reliance on O-rings in critical zones, delivering
superior performance at ultra-high pressure.
• Standard Dust Caps & Safety Lock
Each unit includes integrated safety lock and protective caps to
prevent contamination and accidental release.
• CEJN 125 Series Compatible
Functionally interchangeable with CEJN 125 products, while offering
improved supply flexibility and cost efficiency.
Technical Specifications
| Specification | Value |
|---|
| Working Pressure | 250 MPa (36,250 PSI) |
| Burst Pressure | 500 MPa |
| Nominal Diameter | 2.5 mm |
| Flow Rate | 5.8 L/min |
| Connection Type | G 1/4" |
| Length | 73.8 mm |
| Diameter | 30 mm |
| Wrench Size | 26 mm |
| Torque | 40–50 Nm |
| Sealing Method | CMS 120° metal cone |
| Seal Material | NBR (Nitrile) |
| Temperature Range | -30°C to +100°C |
| Material | Quenched zinc-nickel coated steel |
Typical pressure-flow curve of CB-10125.
Shows minimal pressure drop thanks to its valveless design and
compact internal path.
Dimensional Overview
Female (Socket)
Male (Plug)
Applications
• Hydraulic bolt tensioners
• Bearing pullers
• Ultra-high-pressure test rigs
• High-force tool systems
• Offshore & energy sector pressure fittings
Note: Ideal for static high-load applications. Not suitable for rotational mounting.
Compatibility Notes
The CB-10125 is fully compatible with CEJN 125 series, including
physical size, sealing interface, and hydraulic performance. While
interchangeability is ensured, we recommend verifying seal
materials (NBR vs Viton) and maximum torque settings during
replacement or retrofit scenarios.
FAQ
Q: Can CB-10125 be used in dynamic pressure systems with pulsation?
A: It is suitable for ultra high-pressure, static load cycles. For pulsating systems, consult us for reinforced
variants.
Q: Is the coupling completely valve-free?
A: Yes. The male half (plug) is valve-free to minimize fluid
restriction. The system must be depressurized before disconnection.
Q: Is this compatible with CEJN 125 tools?
A: Yes. CB-10125 is a functionally compatible replacement with CEJN 125, designed for use in bolt tensioners,
pullers, etc.
