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UQD08S Series Quick Connect Fittings

316L Stainless Steel Construction: Superior corrosion resistance for industrial, outdoor, and high-humidity environments

Multi-Material Sealing Options: Standard EPDM seals for water/glycol, with HNBR/FKM alternatives for oil/chemical compatibility

Zero-Leakage Sealing System: Reliable performance under rated pressure, even after repeated connections

Wide Operating Range: -40°C to 120°C temperature resistance, 20 bar working pressure

Versatile Connection Types: UNF/G threads and self-clinching hose barbs for flexible system integration

Harsh Environment Ready: Dust-proof, salt-proof, and resistant to acids, alkalis, and common solvents

Low Pressure Drop: Optimized internal flow path for efficient fluid transfer up to 85 L/min

Long Service Life: Robust construction and precision engineering for continuous use

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Product Description

UQD Series Liquid-Cooled Quick Coupling by Hoonsun is a high-performance fluid connection solution engineered for demanding liquid cooling systems. Manufactured from premium 316L stainless steel with a standard EPDM seal (HNBR/FKM optional), it delivers reliable, leak-proof performance across a wide range of fluids and operating conditions.

With a rated working pressure of 20 bar (burst pressure 80 bar) and an operating temperature range of -40°C to +120°C, this coupling is built for durability and efficiency. Four size options (DN03 to DN10) and multiple connection configurations (UNF/G threads, hose barbs) ensure seamless integration into diverse industrial applications, from data centers to medical equipment.

Applications

Data Center & HPC Liquid Cooling: Server rack and high-performance computing cooling systems
EV Charging Piles & Thermal Management: Liquid cooling connections for electric vehicle charging infrastructure
Industrial Laser Equipment: Precision cooling for high-power industrial lasers
Medical Equipment: MRI machines, diagnostic devices, and precision instrument cooling
Photovoltaic Inverters: Outdoor solar and wind power electronic cooling systems
Test Benches & Automated Systems: Reliable fluid connections for laboratory and industrial test setups
High-Density Electronic Systems: Compact, efficient connections in limited-access environments

Installation Process

Preparation: Ensure the coupling and mating components are clean, free of debris, and undamaged. Depressurize the fluid system before installation.
Connection: Align the plug and socket, then push straightly until a click sound confirms complete locking.
Verification: Perform a pressure test to confirm no leaks before bringing the system online.
Disconnection: Depressurize the system, then simply pull the plug out of the socket. The coupling will automatically seal to prevent fluid loss.

⚠️ Safety Notes:

Never connect or disconnect the coupling while the system is under pressure.
Protect the sealing surface from scratches to maintain long-term leak-proof performance.

Product Specifications

Series	DN Size	Material	Sealing	Connection Options	Working Pressure	Temp Range
UQD02	DN03	316L Stainless Steel	EPDM (HNBR/FKM Optional)	7/16-20 UNF (Thread/Barb), G1/8″ Thread	20 bar	-40°C~120°C
UQD04	DN05	316L Stainless Steel	EPDM (HNBR/FKM Optional)	9/16-18 UNF (Thread/Barb), G1/4″ Thread	20 bar	-40°C~120°C
UQD06	DN07	316L Stainless Steel	EPDM (HNBR/FKM Optional)	3/4-16 UNF (Thread/Barb), G3/8″ Thread	20 bar	-40°C~120°C
UQD08	DN10	316L Stainless Steel	EPDM (HNBR/FKM Optional)	7/8-14 UNF (Thread/Barb), G1/2″ Thread	20 bar	-40°C~120°C

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Compatible Media: Deionized water, purified water, ethylene glycol solution, propylene glycol solution, oils, and fluorinated fluids
Flow Performance: Optimized internal flow path with minimal pressure drop, supporting flow rates up to 85 L/min

FAQ

What makes the UQD series stand out from other quick couplings?

The UQD series combines 316L stainless steel construction with versatile sealing and connection options, making it suitable for a wide range of demanding liquid cooling applications.

Can I choose different sealing materials?

Yes. Standard EPDM seals are suitable for water and glycol solutions. HNBR seals offer better oil resistance, while FKM seals are ideal for high-temperature or chemically aggressive fluids.

What fluids are compatible with these couplings?

They work with most common liquid cooling media, including deionized water, glycol mixtures, industrial oils, and fluorinated fluids.

What are the pressure and temperature ratings?

Rated working pressure is 20 bar (burst pressure 80 bar), with an operating temperature range of -40°C to 120°C.

Are these couplings suitable for outdoor use?

Yes. The 316L stainless steel construction provides excellent resistance to corrosion, salt spray, and extreme temperatures, making them ideal for outdoor and industrial applications.

Do I need tools to install or remove them?

No. The plug-and-play design allows for tool-free connection and disconnection, simplifying installation and maintenance.

Can you customize these couplings?

Yes. We offer custom thread sizes, connection types, and sealing materials to meet unique system requirements.

How long do these couplings last?

With proper installation and maintenance, the 316L stainless steel body and high-quality seals ensure a long service life, even in continuous operation.

Founded in 2006, Zhejiang Hongxiang Connector Co., Ltd. is a high-tech enterprise specializing in the R&D, production, and sales of industrial connectors and fluid solutions. With over 20 years of experience, we provide reliable products to customers worldwide, backed by a professional team and strict quality control.

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UQD08S Series Quick Connect Fittings

Product Description

Applications

Installation Process