ROJO / HanGe rotary joints, unions, and swivel connections

Direct factory supply of industrial rotary joints, rotating unions, and swivel connections manufactured by Shandong HanGe Sealing Technology Co., Ltd. (brand ROJO / HanGe) for cooling water, steam, thermal oil, and hydraulics.

Shandong HanGe Sealing Technology plant and ROJO / HanGe manufacturing

Shandong HanGe Sealing Technology Co., Ltd. (brand ROJO / HanGe) in Tengzhou designs and produces precision rotary joints and unions. The facility manufactures durable rotary unions for steel, paper, and CNC machinery industries.

Dedicated manufacturing plant in Tengzhou with complete CNC precision machining lines
Advanced vertical machining centers, precision lathes, and surface grinding machinery
Direct engineered interchangeability with Deublin, Maier, Rotoflux, and Johnson unions
Comprehensive dynamic runout inspection and hydrostatic pressure testing on every unit

ROJO (HanGe) series 6000 and EQD water rotary joints

Water rotary unions by ROJO (HanGe) series 6000 (models 6200, 6250, 6300, 6400) and EQD models are engineered for cooling and processing water service. Built with cast iron or steel housings in single and dual passage configurations.

Single-passage and dual-passage designs with fixed or rotating internal syphon pipes
High-strength cast iron and carbon steel housings with corrosion-resistant treatment
Threaded rotor connections (metric, BSPP right-hand RH, left-hand LH) and flange types
Precision balanced silicon carbide and carbon graphite seal faces for extended service life

ROJO (HanGe) series QD, QD-F, and QS steam rotary unions

Steam rotary joints by ROJO (HanGe) series QD, quick-change QD-F, and QS-G/QS-X are designed for saturated steam, superheated steam, and hot water in drying cylinders and calenders up to 220 °C and 1.8 MPa.

Operating media temperature up to 220 °C with maximum working steam pressure to 1.8 MPa
Quick-change flange structure on QD-F models enabling fast maintenance without line teardown
Self-supported lubricant-free design utilizing spherical carbon graphite sealing rings
Effective compensation for thermal expansion and angular misalignment in heated drying drums

ROJO (HanGe) PC7000 and WQ series thermal oil rotary joints

Thermal oil rotary unions by ROJO (HanGe) series PC7000-32, WQ1, and HW are engineered for circulating hot thermal fluids in laminating rolls and hot presses. Corrosion-resistant housing ensures reliable service up to 120 °C and 200 bar.

Operating fluid pressure up to 200 bar and rotational speeds reaching 250 RPM
Lightweight aluminum alloy construction on PC7000-32 providing rapid heat dissipation
High-temperature fluorocarbon and graphite secondary seal elements resisting oil coking
Direct drop-in dimensional compatibility with European Maier HW series oil joints

ROJO (HanGe) series 1690, 1790, and 1890 hydraulic multi-passage rotary unions

Multi-passage rotary unions by ROJO (HanGe) series 1690, 1790, 1890, and H1379 provide simultaneous transfer of hydraulic oil (up to 207 bar), air, and vacuum into rotary index tables and clamping fixtures.

Rated working pressure reaching 207 bar on hydraulic ports and 10 bar on pneumatic lines
Multi-passage arrangements from 2 up to 12 separate fluid channels with isolated weep ports
Precision anti-friction bearings maintaining tight radial runout tolerances under high side loads
Proprietary wear-resistant rotary seal rings designed for variable pressure cycling

ROJO (HanGe) series 1129 and FS1016 high-speed machine spindle coolant unions

Through-spindle coolant unions by ROJO (HanGe) series 1129, 1109, and FS1016 are engineered for CNC milling and turning spindles. They provide high-pressure coolant, air purge, and MQL lubrication at speeds reaching 24,000 RPM.

Operating spindle speeds up to 15,000 to 24,000 RPM with minimal resistive drag torque
Silicon carbide and ceramic seal faces resisting abrasion from ultrafine metal microchips
Universal capability handling liquid coolant, micro-lubrication MQL, and dry air blowout
Advanced labyrinth barriers and relief drainage ports shielding machine spindle bearings

ROJO (HanGe) series WN16 and DN pipeline swivel joints

Pipeline swivel joints by ROJO (HanGe) series WN16 and DN are built for articulated pipework, loading arms, and swing booms. Made from stainless or alloy steel with dual ball bearing raceways providing continuous 360-degree rotation.

Smooth 360-degree rotation available in single, dual, or triple plane swivel configurations
Dual-row hardened ball raceways handling heavy bending moments and combined thrust loads
Stainless steel AISI 304/316 and treated carbon steel options for aggressive chemical fluids
Multi-layer synthetic elastomer packing rings tailored for water, fuels, and chemical slurries

ROJO (HanGe) stainless steel flexible metal hoses and repair seal kits

To absorb vibration at rotary union ports, ROJO (HanGe) manufactures flexible stainless steel metal hoses with braided wire reinforcement. The product range also includes complete replacement seal kits, graphite rings, and precision bearings.

Corrugated flexible metal hoses in stainless steel AISI 304 with custom end fitting adaptors
High-tensile wire single and double braided exterior protecting against high pressure surges
Factory-original rebuild seal kits designed for scheduled turnaround and maintenance cycles
Replacement balanced friction faces in silicon carbide SiC, tungsten carbide, and carbon

Selecting ROJO (HanGe) rotary unions based on fluid medium and operating conditions

When specifying a ROJO (HanGe) rotary union, the primary technical consideration is the physical properties of the fluid alongside dynamic temperature, pressure, and rotational velocity envelopes.

For industrial cooling water service up to 100 °C, series 6000 models (such as 6200, 6250, and 6300) provide dependable service with balanced silicon carbide against carbon mechanical seals.

For high-temperature steam duties reaching 220 °C, series QD and quick-change QD-F unions utilize self-aligning spherical carbon graphite rings that serve both as radial journal bearings and primary pressure seals.

In machine hydraulic circuits operating up to 207 bar, rotor thread direction must oppose shaft rotation to prevent unthreading.

Proper installation practices and preventing shaft misalignment on series 6000 and QD

The leading cause of premature face seal failure in rotating machinery is rigid external piping installation. The stationary housing of a ROJO (HanGe) rotary joint must remain floating relative to the rotating machine spindle or dryer drum axis.

Piping connections for steam, thermal oil, or coolant must always incorporate flexible metallic braided hoses with adequate bend radii to absorb runout.

The anti-rotation torque bracket must engage the housing lug with a loose 2 to 3 mm clearance, restraining rotational movement without exerting side loads onto bearings.

Hot oil circulation in PC7000 units and multi-passage hydraulic operations on series 1690

In thermal oil applications on calenders and laminator rolls reaching 120 °C, ROJO PC7000-32 rotary unions operate where oil oxidation poses risks.

The lightweight high-grade aluminum alloy housing rapidly radiates internal friction heat away from the bearing chamber, protecting rolling elements against premature lubricant breakdown.

For multi-passage hydraulic unions such as series 1690, 1790, and 1890 transferring high-pressure fluid up to 207 bar to index tables, dedicated atmospheric drain lines must be piped back to the reservoir.

This essential practice relieves internal bypass pressure and prevents cross-contamination between passages.

Maintenance guidelines and replacing wear-face mechanical seals on ROJO assemblies

Routine operational inspection of ROJO (HanGe) rotary joints should be conducted every 500 operating hours. Key inspection parameters include checking for seepage at external weep ports, monitoring bearing housing temperature (below 75 °C), and verifying smooth rotation without vibration.

When persistent fluid leakage occurs at weep ports, the union should be serviced using a factory rebuild kit.

Rebuilding involves replacing the seal rings (silicon carbide or carbon graphite), secondary fluoroelastomer FKM or FFKM elastomeric rings, and wave springs to restore factory-new operating performance.

High-speed through-spindle coolant delivery technology in series 1129 unions

ROJO series 1129 through-spindle coolant unions operate at speeds up to 24,000 RPM in CNC machine centers. The assemblies utilize ultra-hard ceramic sealing faces capable of resisting dry running during rapid automated tool change sequences.

Integrated labyrinth barriers and radial relief drainage channels safeguard delicate spindle ball bearings against coolant mist ingress and fine abrasive chip microparticles during high-speed machining of alloys.

Applications of articulated pipeline swivel joints WN16 in fluid transfer systems

Articulated pipeline swivel joints by ROJO (HanGe) series WN16 deliver reliable 360-degree rotation during fluid handling operations across railcar loading racks, marine terminals, and flexible industrial manifolds.

Dual-row induction-hardened ball raceways absorb high cantilever bending moments generated by piping weight while maintaining positive sealing across multi-layered elastomer packing elements.

What we do not claim

ROJO / HanGe and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of ROJO / HanGe and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.