DIN 2353 Single Ferrule Swivel Union Fitting

Create a final, stress-free connection in your rigid hydraulic tube systems. The Stark Single Ferrule Swivel Union is a problem-solving component, engineered to provide an adjustable final connection point between two fixed tube lines. Its unique swivel nut design allows for easy alignment and tightening without transmitting any torque to the tubing, making it the ideal choice for closing a loop, final equipment hook-ups, and simplifying maintenance in complex, rigid piping systems.

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✓ DIN 2353 / ISO 8434-1 Compliant| ✓ Eliminates Torsional Stress| ✓ Simplifies Maintenance

🔧 Configure Your Swivel Union in Seconds

Our DIN 2353 compliant hydraulic swivel unions are available in two pressure series to match your specific system requirements. Find your part number by selecting the series and tube O.D.

1. Select Your Pressure Series:

○ L (Light Duty - up to 315 bar)
○ S (Heavy Duty - up to 630 bar)

2. Select Your Metric Tube O.D. (mm)

🔥 Most Common Configurations (In Stock - Same Day Shipping)

L Series (Light Duty)	S Series (Heavy Duty)
GZ08L(8mm Tube, 315 bar)	GZ12S(12mm Tube, 630 bar)
GZ12L(12mm Tube, 315 bar)	GZ16S(16mm Tube, 400 bar)
[Add to Quote]	[Add to Quote]

Part Number Format: [Material]-GZ[Tube O.D.][Series] (e.g., INC625-GZ08L)

(GZ = Swivel Union)

🛠 The Engineering Advantage

Zero-Torque Installation: The swivel nut design allows you to tighten the connection without rotating the fitting body or the tubing. This eliminates torsional stress on the tube lines, which is a common cause of leaks in rigid systems.

Ideal for Final Connections & Maintenance: Perfect for the final "make-up" connection between two fixed points or for installing components (like filters or valves) into an existing rigid line. It allows for easy removal and reinstallation of components without having to bend or reposition the tubing.

Proven, Standardized Design: By adhering to the globally recognized DIN 2353 / ISO 8434-1 standard, our swivel unions guarantee dimensional interchangeability and performance you can trust.

High-Pressure DKO Soft-Seal Technology: Our Swivel Unions feature the DKO standard 24° cone with an integrated high-performance O-ring. This dual-sealing system combines the structural strength of metal-to-metal contact with the leak-proof security of an elastomeric seal, ensuring a zero-leakage performance even under extreme pressure spikes and vibrations of heavy-duty hydraulic systems.

📈 Technical Specifications

Feature	Stark Standard Specification
Standard	DIN 2353 / ISO 8434-1
Body Material	Forged 316/316L Stainless Steel
Ferrule Material	Case-Hardened 316 Stainless Steel
Seal Material	NBR (Nitrile) Standard, FKM (Viton) Optional
Pressure Series	L (Light - up to 315 bar), S (Heavy - up to 400 bar)
Testing	100% Hydrostatic Tested to 1.5x Working Pressure
Compliance	MTR to EN 10204 3.1 & PMI Verified

📌 Targeted Application Support

Final System Closure: The perfect solution for the final connection in a rigid tube loop where there is no room to move the tubes.

In-Line Component Maintenance: Allows for easy removal of in-line components like filters, check valves, or sensors without disturbing the rest of the piping.

OEM Equipment Assembly: Simplifies the final assembly of complex hydraulic systems on machinery and equipment.

Difficult-to-Access Locations: Makes it possible to tighten a connection in tight spaces where rotating a full fitting body is impossible.

❓ Frequently Asked Questions (FAQ)

Q1: What is the main purpose of a swivel union?

Its main purpose is to create a stress-free final connection in a rigid tube system. The swivel nut allows you to tighten the seal without twisting the tube, which is essential when connecting two fixed points. It also greatly simplifies maintenance by allowing easy removal of components.

Q2: How does the swivel connection seal?

The swivel connection is sealed by an O-ring located in a groove on the fitting body. When the swivel nut is tightened, it compresses this O-ring to create a high-pressure, leak-tight seal.

Q3: Can this fitting rotate under pressure?

No. A swivel union is designed to be adjustable during installation only. Once tightened, it is a fixed, static connection and should not be rotated under pressure. For applications requiring continuous or intermittent rotation, you need a dedicated rotary union or swivel joint.

Q4: What is the standard O-ring material, and are other options available?

Our standard O-ring material is NBR (Nitrile), which is suitable for most standard hydraulic oils. We also offer FKM (Viton) O-rings as an option for higher temperature applications or when using synthetic fluids.

📦 Complete DIN 2353 Size & Pressure Chart

Need a custom material or seal option?[Request Custom Configuration]

💬 Still Have Questions?

Our engineering team is ready to assist with technical selection, system design, or material recommendations.

[Chat with an Engineer] [Email: sales@starkvalve.com] [Call: +86-13917221881]

🔒 Disclaimer

Parker Ermeto/EO/EO-2® and Voss® are registered trademarks of their respective holders. Stark is not affiliated with, endorsed by, or sponsored by these companies. Part numbers and brand names are provided for cross-reference and compatibility purposes only.

Single Ferrule Hydraulic Union Swivel Fitting