MK21 Series
2 passages G1/8" Gas/Vacuum + 0~96 Circuits
pneumatic rotary coupling and pneumatic swivel joint
    MK21 is 2 passages pneumatic rotary coupling and pneumatic swivel joint, Moflon focused pneumatic rotary coupling and pneumatic swivel joint for over 30 years.
  • • with connection size G1/8", compact size, light weight, low torqure, Also optional for transmitting power line, signal line, industrial bus, control line, Electromagnetic valve, induction line, etc.;
    • Pneumatic swivel joint can combine 2~96 circuits(2A)/Power 10A.
    • Media Types: compressed Air/Gas, vacuum, etc.
Specifications
Pneumatic Rotary Coupling SpecificationsMechanical data
ParameterValueParameterValue
Passage2 in 2 out, G1/8"Working LifeOver 10 Million Revs
Max.5MPa Vacuum 0.01torrRotating Speed500RPM
TorqueSee Part#ListWorking Temp.-30℃~80℃
Electrical dataOperating Humidity0~85% RH
ParameterValueContact MaterialSee Prod Quality Level
PowerSignalHousing MaterialAluminium Alloy
Rated Voltage0~240VAC/VDC0~440VAC/VDCProtection gradeIP51
Insulation Res≥1000MΩ/500VDC≥1000MΩ/500VDC
Lead WiresAWG16#TeflonAWG22#Teflon
Lead LengthStandard 300mm
Dielectric Strength500VAC@50Hz,60s
Res Noise<0.01Ω



MK21 (rotary union only for pneumatic) drawing (2 in 2 out, connection size G1/8")
MK21 Parts# List
ModelPassagesConnection SizeTube Size
MK212G1/8"6~8mm


MK21S-S12/MK21S-S18/MK21S-S24/MK21S-S36 drawing
MK21S-S12/MK21S-S18/MK21S-S24/MK21S-S36 Parts# List
ModelPassagesConnection SizeTube SizeSignal(2A)L(mm)
MK21S-S122G1/8"6~8mm1221
MK21S-S182G1/8"6~8mm1828
MK21S-S242G1/8"6~8mm2438.6
MK21S-S362G1/8"6~8mm3652.3


MK21S-S56 drawing 2 in 2 out, connection size G1/8"+56XSignal(2A)
MK21-S56 Parts# List
ModelPassagesConnection SizeTube SizeSignal/(2A)L(mm)
MK21-S562G1/8"6~8mm5680.7


MK21-PXX-SXX drawing 2 in 2 out, connection size G1/8"+signal(5A)/10A
MK21-PXX-SXX Parts# List
ModelPassagesConnection SizeTube Size10ASignal/5AL(mm)
MK21-P06102G1/8"6~8mm6038
MK21-S062G1/8"6~8mm0638
MK21-P12102G1/8"6~8mm12054.8
MK21-P0610-S062G1/8"6~8mm6654.8
MK21-S122G1/8"6~8mm01254.8
MK21-P18102G1/8"6~8mm18071.5
MK21-P0610-S122G1/8"6~8mm61271.5
MK21-P1210-S062G1/8"6~8mm12671.5
MK21-S182G1/8"6~8mm01871.5
MK21-S242G1/8"6~8mm02488.4
MK21-P0610-S182G1/8"6~8mm61888.4
MK21-S302G1/8"6~8mm030105.2
MK21-S362G1/8"6~8mm036125


What is pneumatic rotary coupling and pneumatic swivel joint?

Pneumatic rotary coupling is a device used to transfer gas under pressure or vacuum from a stationary inlet to a rotating outlet, preserving and isolating the gas connection. Pneumatic swivel joint is a device used to transfer gas under pressure or vacuum from a stationary inlet to a rotating outlet, preserving and isolating the gas connection when rotating 360°.

Moflon offer standard pneumatic rotary coupling and pneumatic swivel joint product lines grouped by function and feature exclusive sealing technology selected for compatibility to each application's operating pressure, temperature, speed, media, and required service life.

Moflon's pneumatic rotary couplings and pneumatic swivel joints are used for injection presses,intelligent machinery,bridge cranes,platform cranes,laminating equipment,machine tools,manipulators, electric,jib cranes,knuckle boom cranes,cctv cameras & monitors,flight simulators,military defense equipment,medical and health care products,pedestal cranes,electric reels,industrial cable reels,antennas,rough terrain cranes,tower cranes and so on.

Note:10A and signal(5A) can be freely combined, please contact customer service for details.

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