MQR Series Low Torque Gap Seal Rotary Union (SOLH)

Brand: SOLH by Richge Technology 

Product Positioning

     MQR series is a multi-channel rotary union adopting metal non-contact gap sealing with ultra-low rotating torque. Specially developed for continuous rotating parts including robot joints, rotary tables and rotary shafts to deliver compressed air and vacuum. It completely avoids pipeline twisting, features ultra-smooth rotation and ultra-long service life for automated rotary pneumatic systems.

Core Product Advantages

     -- Ultra-low rotating torque: Only 0.003～0.50 N·m, brings tiny extra load to driving servo/motor

     -- Metal gap non-contact sealing: No rubber seal rings, no sticking or jamming; smooth startup even after long-term static storage

     -- Independent multi-channel air circuits: Optional 1/2/4/8/12/16 passages with zero cross-leakage between each circuit

     -- Ultra-extended service life: Up to 1 billion rotation cycles, fully maintenance-free design

     -- Bidirectional rotation & high speed capacity: Max rotational speed up to 3000 rpm, suitable for high-speed rotary indexing equipment

     -- Dual vacuum & positive pressure compatible: Operating pressure range -100kPa ~ 1.0MPa, works for both vacuum suction and standard air supply loops

Universal Standard Technical Specifications

     -- Applicable Fluid: Compressed air, inert gas

     -- Operating Pressure Range: -100kPa ~ 1.0MPa

     -- Ambient & Medium Temperature: -10 ~ 80℃

     -- Sealing Type: Non-contact metal gap seal structure

     -- Support Structure: Double bearing guiding support

     -- Port Thread: M5×0.8 (internal / external thread optional)

     -- Lubrication Requirement: Lubrication-free, no regular oil filling needed

Model Parameter Quick Reference Table

Model Naming Rule Examples

     -- MQR4-M5: 4 independent passages, standard M5 thread port

     -- MQR8-M5: 8 independent passages, standard M5 thread port

     -- MQR16-M5: 16 independent passages, standard M5 thread port

Typical Application Scenarios

     -- Pneumatic air supply for industrial robot arm joints and rotary shafts

     -- Rotary indexing tables, rotary cylinders and turntable automation equipment

     -- Continuous rotating air supply loops on automated processing stations

     -- Rotary vacuum adsorption mechanisms for suction cups and clamping jigs

     -- Rotary pneumatic circuits for packaging, printing and electronic manufacturing machinery

Key Installation Guidelines

     -- Fix the stationary housing, drive the rotating side via connecting plate

     -- Flexible coupling assembly is recommended to eliminate radial offset load

     -- The rotary union cannot bear large radial or axial force; it is only used for medium transmission

     -- Spiral arranged port layout simplifies tubing routing and prevents pipeline winding during rotation

One Sentence Summary

     SOLH MQR multi-channel metal gap seal rotary union features ultra-low rotating torque, maintenance-free 1-billion-cycle lifespan, dual vacuum-positive pressure compatibility and optional 1~16 independent air passages, the ideal pipeline anti-twist air supply component for robot joints and all high-speed rotary automation equipment.