Cixi Poolke Hydraulic Pneumatic Co., Ltd. is one of the leading manufacturers and suppliers of 21 mini pneumatic quick couplings in China. We are committed to providing high quality customized service to global clients. Please feel free to wholesale the newest 21 mini pneumatic quick couplings from our factory.
Mini Pneumatic Quick Couplings – 21 Series
The 21 Mini Pneumatic quick couplings from the POOLKE 21 Series are designed for compact compressed-air installations where small dimensions, efficient airflow and convenient operation are required. With a nominal flow diameter of 5 mm and flow capacity up to 530 L/min, the series delivers reliable compressed-air performance while keeping the coupling body compact for use in space-restricted equipment.
The 21 Series features one-hand operation for quick connection and disconnection, making it suitable for production equipment, small pneumatic tools and automation systems that require frequent line changes. Multiple connection configurations are available, including male and female threads, hose barbs, hose nuts and bulkhead connections, allowing flexible integration into different piping layouts. Optional double shut-off versions are also available for applications requiring automatic valve closure on both sides after separation. With its compact profile and broad connection range, the 21 Mini Pneumatic quick couplings provide a practical solution for modern pneumatic systems where installation space and operational efficiency are equally important.
Key Features
Compact Mini Design
The small body size saves installation space and makes the coupling ideal for compact pneumatic equipment and densely arranged air circuits.
Efficient Airflow Performance
Provides flow capacity up to 530 L/min through a 5 mm nominal flow diameter for dependable compressed-air delivery.
One-Hand Operation
Designed for fast one-hand connection and disconnection, helping simplify maintenance and frequent equipment changes.
Optional Double Shut-Off
Double shut-off configurations are available for applications requiring both sides of the connection to close automatically when disconnected.
Wide Connection Selection
Available with threaded, hose barb, hose nut and bulkhead configurations for flexible pneumatic system installation.
Reliable Compact-System Performance
Combines small dimensions with secure connection and dependable sealing for repeated industrial use.
Applications
The 21 Mini Pneumatic quick couplings are suitable for:
- Factory automation
- Compact pneumatic tools
- Robotics and assembly equipment
- Small pneumatic cylinders
- Measurement and control systems
- Industrial compressed-air circuits
Technical Overview
| Series | 21 | Operation | One-Hand Operated |
| Type | Mini Pneumatic Quick Couplings | Valve Option | Optional Double Shut-Off |
| Nominal Flow Diameter | 5 mm | Connection Options | Male / Female / Hose Barb / Hose Nut / Bulkhead |
| Flow Capacity | 530 L/min | Temperature Range | -20°C to +100°C |
| Max. Working Pressure | 35 Bar |
Interchangeability
Cross-reference examples include:
Rectus 21 ka, 90ka, Legris series 21, Camozzi, Bosch size 2
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