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FKK Series Straight-Connection Type With Quick-Change Joint

The straight-through integrated structure features quick-release locking mechanisms at both ends, ensuring a straight pipeline connection, smooth airflow, and minimal pressure loss.

Built-in nut locking mechanism, specifically designed for “woven polyurethane hoses (braided PU hoses)”, ensuring a secure and slip-free clamping experience.

The body is made of high-quality brass plated with nickel, which is pressure-resistant, corrosion-resistant, and has a clean appearance.

    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 -
    FKK Series Straight-Connection Type With Quick-Change Joint1

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