01
FKQ2H Series Straight-Connection Joint (Gasket)
Detailed description
The sealing element combines stainless steel with a double-sided NBR composite gasket, creating a configuration that maintains sealing integrity across various thread types including Rc, G, and NPT internal threads. This design effectively compensates for variations in thread tolerances or chamfer differences that might otherwise compromise the seal, reducing the need for installers to apply supplemental sealants or torque to inconsistent specifications.
Pressure adaptability across a wide range is a notable characteristic of this series. The fittings function reliably from negative pressure conditions down to -100 kPa up to positive pressures of 1.0 MPa, which corresponds to approximately 10 bar. This broad operating range accommodates applications spanning low vacuum systems through standard industrial pneumatic circuits without requiring different fitting specifications for different pressure regimes.
Tube handling has been simplified through a one-button insertion and removal mechanism. When tubing is inserted, the internal gripping elements engage with minimal resistance, requiring little force to complete the connection. Disassembly follows a similar pattern, with the release mechanism requiring light actuation to disengage the tube without causing damage to the tubing surface or compromising its structural integrity. This ease of use proves beneficial in applications where frequent tubing changes occur or where space constraints limit manual dexterity.
The physical configuration incorporates a rotating interface between the main body and the threaded section. This swiveling capability permits the fitting to be installed in confined spaces where alignment between the mounting port and the tube direction may not be perfectly coaxial. The rotational feature allows the body to be positioned for optimal tube routing after the threaded connection has been fully tightened, simplifying installation in cramped equipment layouts.
Material selection addresses compatibility with common pneumatic tubing types. The fitting accepts both nylon and polyurethane tubing without requiring specialized versions. The main body construction utilizes PBT engineering plastic combined with brass components, while sealing elements are fabricated from NBR material. This combination of materials provides resistance to typical industrial operating conditions and maintains consistent performance across the product lifecycle.
Technical parameters
| Model | Suitable Pipe Outer Diameter | Connecting Thread | H | ΦD | L | A | M |
| FKQ2H04-M3G | Φ4 | M3×0.5 | 8 | 7.9 | 17.3 | 14.8 | 13.3 |
| FKQ2H04-M5 □ | M5×0.8 | 8 | 7.9 | 17.8 | 14.8 | 13.3 | |
| FKQ2H04-M6 □ | M6×1.0 | 8 | 7.9 | 18.8 | 14.8 | 13.3 | |
| FKQ2H06-M5 □ | Φ6 | M5×0.8 | 10 | 9.8 | 18.1 | 15.1 | 13.3 |
| FKQ2H06-M6 □ | M6×1.0 | 10 | 9.8 | 19.1 | 15.1 | 13.3 |
