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FKK Series Straight-Connection Type With Quick-Change Joint
Detailed description
The FKK Series straight-connection type is designed with a straight-through integrated structure that incorporates quick-release locking mechanisms at both ends. This configuration allows for direct inline connections between two sections of hose, maintaining a straight pipeline path that promotes smooth airflow and helps minimize pressure loss across the connection. The absence of bends or restrictive elements within the flow path supports consistent air delivery in pneumatic circuits.
A built-in nut locking mechanism is incorporated specifically for use with woven polyurethane hoses, also known as braided PU hoses. This type of hose features a reinforcing fabric layer that enhances its ability to withstand pressure. The internal nut mechanism tightens around the hose to create a secure clamping effect, helping to prevent slippage or unintentional detachment even under conditions where vibration, tension, or pressure fluctuations may occur. The design is intended to provide reliable retention tailored to the structural characteristics of braided hoses.
The body of the connector is constructed from high-quality brass with a nickel-plated finish. This material combination offers good mechanical strength and resistance to pressure, making it suitable for applications where the joint may be subjected to elevated operating pressures. The nickel plating also provides corrosion resistance, helping to protect the component from environmental exposure such as moisture or airborne contaminants. Additionally, the plated surface contributes to a clean, uniform appearance that is often desirable in equipment where visual presentation or ease of cleaning is a consideration.
The quick-release locking mechanisms at both ends simplify installation and removal, allowing users to connect or disconnect hoses without the need for tools. This feature supports efficient assembly during initial setup and reduces downtime during maintenance or reconfiguration. When combined with the internal nut locking mechanism, the overall design offers both ease of connection and long-term stability for the hose interface.
The FKK Series straight-connection type is suited for pneumatic systems that utilize braided polyurethane hoses, particularly in applications where secure clamping, minimal pressure loss, and corrosion-resistant construction are required.
Technical parameters
| Model | Body size | Suitable hose inner diameter/outer diameter | ΦD1 | ΦD2 | L1 | L2 When connecting | M | Minimum Hole Diameter |
| FKK2S-23H | M5 | Φ3.2 | 10.4 | 7 | 33.8 | 35.3 | 12.7 | 2.5 |
| FKK2S-04H | Φ4 | 8 | 33.6 | 35.4 | 3.4 | |||
| FKK2S-06H | Φ6 | 10 | 34.5 | 36.4 | 13.5 | 4.7 | ||
| FKK3S-04H | 1/8 | Φ4 | 20.2 | 10 | 46.6 | 49.1 | 16 | 3.2 |
| FKK3S-06H | Φ6 | 12 | 47.1 | 49.6 | 17 | 4.7 | ||
| FKK3S-08H | Φ8 | 14 | 48.9 | 51.4 | 18.5 | 6.2 | ||
| FKK3S-10H | Φ10 | 17 | 49.9 | 52.4 | 21 | 7.7 | ||
| FKK4S-06H | 1/4 | Φ6 | 28 | 12 | 58.2 | 61.9 | 17 | 4.7 |
| FKK4S-08H | Φ8 | 14 | 60.1 | 63.8 | 18.5 | 6.2 | ||
| FKK4S-10H | Φ10 | 17 | 61.5 | 65.2 | 21 | 7.7 | ||
| FKK4S-12H | Φ12 | 19 | 62.5 | 66.2 | 22 | 9.2 | ||
| FKK6S-12H | 1/2 | 31.6 | 70.1 | 75.4 | 13.2 | |||
| FKK6S-16H | Φ16 | 25.7 | 72.3 | 77.6 | 25 | - |


