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Every connection counts on modern industrial systems. Whether you’re moving chemicals, fluids, or gases, the quality of your line connections has a direct impact on uptime, safety, and efficiency.
For this reason, quick connect couplings, small but important parts that simplify, speed up, and reduce leaks in fluid transfer, are used by engineers and plant managers all over the world.
Because of their exact engineering, stainless steel structure, and reliable sealing performance, Dawsonstech’s Series CQ11 and CQ21 are among the most dependable choices. With durability and ease of use guaranteed, each series is made to satisfy exacting industrial standards.
What Are Quick Connect Couplings?
Quick connect couplings are mechanical fittings that enable tool-free connection and disconnection of fluid lines.
Unlike threaded fittings, these use a push-and-pull locking system that saves time, minimizes fluid loss, and reduces contamination risk.
They are essential wherever frequent maintenance, equipment changes, or cleaning cycles occur, such as in hydraulic systems, chemical processing units, test benches, and instrumentation lines.
A well-designed coupling not only boosts productivity but also ensures system integrity and operator safety.
Quick Connect Couplings Series CQ11 – High-Pressure, Double Shut-Off Coupling
Developed for high-pressure applications that require complete sealing at both ends when disconnected, the CQ11 Series is a double shut-off fast connect coupling. By reducing fluid loss and air infiltration, this design preserves the system’s functionality and cleanliness.
CQ11, which is made of SS316 stainless steel, has remarkable strength and resistance to rust in harsh conditions. It provides compatibility with systems around the world by being interchangeable with ISO 7241-1 Series B connectors.
Key Features
- Double Shut-Off Valves – Automatically seal both halves to prevent leaks and spillage.
- High-Pressure Rating – Handles up to 5000 PSIG (≈ 345 bar).
- Wide Temperature Range – Performs reliably up to 180 °C.
- Multiple Thread Options – BSPP, BSPT, and NPT from ¼″ to 1″.
- Secure Ball Locking Mechanism – Guarantees reliable, leak-free operation and high engagement.
Quick Connect Couplings Series CQ21 – Flat-Face, Zero-Spill Coupling
When cleanliness and contamination control are top priorities, the CQ21 Series is the solution of choice.
Because it reduces fluid drips and air inclusion during disconnection, this flat-face coupling is perfect for settings like precision chemical, pharmaceutical, and laboratory operations where zero-spill operation is important.
Its hygienic, easily cleaned architecture guarantees connections free of bacteria.
Key Features
- Flat-Face No-Spill Design – Virtually eliminates spillage and air ingress.
- Cleanable Surface – Wipe-down maintenance keeps the system contamination-free.
- SS316 Stainless Steel Construction – Corrosion-resistant and durable.
- One-Hand Operation – Easy to connect and disconnect even in tight spaces.
- Leak-Free Performance – Advanced sealing for safe and hygienic operation.
CQ11 vs CQ21 – Comparison Overview
| Feature | CQ11 | CQ21 |
| Valve Type | Double Shut-Off | Flat-Face No-Spill |
| Design Standard | ISO 7241-1 Series B | Proprietary Flat-Face |
| Pressure Rating | Up to 5000 PSIG (≈ 345 bar) | Up to 420 bar (model dependent) |
| Temperature Range | Up to 180 °C | Up to 150 °C |
| Fluid Loss | Minimal | Virtually none |
| Primary Advantage | High pressure & ISO compatibility | Clean, contamination-free handling |
| Ideal For | Hydraulic & industrial systems | Chemical & high-purity systems |
How to Choose the Right Coupling
Select CQ11 if your system requires:
- High-pressure handling under load
- Compatibility with ISO 7241-1 Series B
- Durability in harsh or corrosive conditions
Select CQ21 if your application prioritizes:
- Spill-free, contamination-free operation
- Cleanroom or chemical process hygiene
- Environmental and operator safety
Maintenance & Best Practices
To maximize performance and lifespan:
- Clean both coupling ends before connection/disconnection.
- Avoid disconnection under full system pressure.
- Inspect O-rings and seals regularly; replace if worn.
- When storing or transporting, use protective caps.
Long-term reliability of the system and consistent, leak-free operation are guaranteed when these procedures are followed.
Why Professionals Trust Dawsonstech
Dawsonstech has built a global reputation as a precision manufacturer of quick connect couplings for demanding industries.
Every coupling is engineered and quality-tested in-house to deliver safe, consistent, and high-performance fluid connections.
Our Strengths
- In-House Engineering & Testing – Controlled production ensures accuracy.
- Global Compatibility – Compliant with ISO and international standards.
- Customization Options – Tailored solutions for special applications.
- Fast Delivery & Support – Global logistics and responsive technical assistance.
The single purpose of each product’s design is to increase the reliability of your system by offering a safe, effective, and leak-proof connection.
Explore Dawsonstech’s Quick Connect Coupling Solutions
Series CQ11: Double shut-off couplings for high-pressure hydraulic and process systems.
Series CQ21: Flat-face couplings for clean, spill-free fluid handling.
Other Series: Instrumentation lines, corrosive media, and high-pressure gases all have specialized variations.
🔗 Explore our full range of Quick Connect Couplings or connect with our team for expert technical guidance.
