Ingiant Technology specializes in manufacturing high-performance, long-service-life pneumatic rotary unions designed exclusively for industrial winding and unwinding production equipment. Our flagship LHK078-4Q 4-channel rotary joint integrates advanced sealing structure, premium metal raw materials and standardized technical parameters, delivering stable air transmission performance for continuous heavy-duty roll-to-roll manufacturing lines, solving the common problems of gas cross leakage, fast wear and pressure fluctuation on traditional rotary connectors.
1. Core Sealing Performance Advantages
The biggest highlight of the LHK078-4Q rotary union is its spring energy storage composite PTFE sealing system, which brings two core competitive advantages: zero gas cross leakage and ultra-low rotational friction. Different from ordinary single-ring sealing rotary joints on the market, our built-in elastic spring structure continuously pushes the PTFE sealing rings to maintain tight contact between the static housing and rotating rotor during long-term operation. Four completely separated independent air passages are fully isolated by multi-layer composite sealing components, so air pressure signals transmitted in each channel will not mix or leak mutually, completely avoiding production failure caused by disordered tension control of winding equipment.
Polytetrafluoroethylene (PTFE) material owns an extremely low friction coefficient, which greatly reduces rotation resistance when the rotor rotates continuously. The friction loss between moving parts is far lower than rubber and polyurethane seals, which effectively lowers the load of the driving motor of winding machines and saves long-term power consumption. Meanwhile, the PTFE seal features excellent temperature resistance, and it will not soften, deform or lose sealing elasticity under the maximum working temperature of 100°C, ensuring consistent sealing effect even after 24-hour non-stop heavy-duty production. All sealing assemblies are pre-assembled and tested in dust-free workshops, each finished unit passes air tightness inspection before leaving the factory to guarantee zero leakage rate of delivered products.
2. Premium Material & Precision Manufacturing Craft
Every structural component of LHK078-4Q is made of industry-standard high-strength anti-wear metal materials, with strict surface treatment process to extend service life and improve environmental adaptability.
- Rotor (Shaft): Adopts 12L14 free-cutting steel, heat treated to reach hardness of 56-62 Rc, then processed with black oxide anti-rust coating. The high-hardness steel rotor can withstand long-term cyclic rotational friction without shaft surface abrasion and clearance expansion, avoiding air leakage caused by increased fit gap after thousands of working hours. The black oxide layer blocks air and moisture, preventing rust even in humid industrial workshop environments.
- Housing: Made of 6061-T6 aviation-grade aluminum alloy, finished with Type 2 Class 2 red hard anodizing treatment. The thick anodic oxidation layer enhances surface scratch resistance, oxidation resistance and corrosion resistance, effectively resisting chemical vapor and dust erosion in textile, lithium battery and plastic film production workshops. Aluminum alloy material keeps the whole rotary union compact and lightweight, will not add extra load to the winding roller shaft.
All internal flow channels are processed by CNC precision lathes, with smooth inner wall without burrs, which reduces gas flow resistance and avoids unnecessary pressure loss during air transmission. All parts go through deburring, ultrasonic cleaning and dimensional tolerance detection before assembly, ensuring matching accuracy of every component and stable rotation without jitter or abnormal noise.
3. Complete Standard Technical Parameters
Model Number: LHK078-4Q Number of Air Channels: 4 independent separated air passages Standard Port Thread: 1/4″ NPT Applicable Working Medium: Clean compressed gas, non-corrosive industrial air Maximum Applicable Rotation Speed: ≤200 RPM Maximum Allowable Working Pressure: ≤2 MPa Permissible Operating Temperature Range: Normal ambient temperature to 100°C Surface Treatment: Red Type 2 Class 2 anodized aluminum housing, black oxide hardened steel rotor Mounting Form: Standard flange fixed installation
These parameter indicators are fully matched with medium and low-speed winding production lines, covering most mainstream pneumatic tension control systems for roll material processing equipment. Whether it is low-speed thick paper winding or medium-speed thin film slitting and unwinding, the rotary union can maintain stable air pressure output without pressure drop or gas leakage during start-stop and forward-reverse rotation switching.
4. Stable Running Performance for Heavy-Duty Continuous Production
Optimized internal bearing matching structure makes the rotor rotate smoothly with tiny friction torque, no jamming, stuck rotation or sharp abnormal noise even under long-time vibration environment of slitting machines. The compact integrated overall structure avoids loose parts caused by long-term mechanical vibration, and the internal sealing structure will not fail instantly under frequent alternating rotation of winding and unwinding rollers.
The product is designed for non-stop heavy-duty production mode, supporting 24-hour uninterrupted cyclic operation without mandatory shutdown rest. Compared with ordinary rotary joints that need regular seal replacement within one month, our PTFE composite sealing structure can keep stable performance for several months under continuous operation, greatly reducing maintenance frequency and labor cost of equipment.
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