Specifications
Pneumatic Rotary Unions Specifications
Mechanical data
Parameter
Value
Parameter
Value
Passage
2 in 2 out, G1/8″
Working Life
Over 10 Million Revs
Max.
5MPa Vacuum 0.01torr
Rotating Speed
500RPM
Torque
See Part#List
Working Temp.
-30℃~80℃
Electrical data
Operating Humidity
0~85% RH
Parameter
Value
Contact Material
See Prod Quality Level
Power
Signal
Housing Material
Aluminium Alloy
Rated Voltage
0~240VAC/VDC
0~240VAC/VDC
Protection grade
IP51
Insulation Res
≥500MΩ/500VDC
≥500MΩ/500VDC
Lead Wires
AWG17#Teflon
AWG22#Teflon
Lead Length
Standard 300mm
Dielectric Strength
500VAC@50Hz,60s
Res Noise
<0.01Ω
Part List
Dimension
Installing
Options
Customized
Case-Study
Price
MKD21 (rotary union only for pneumatic) drawing (2 in 2 out, connection size G1/8")
MKD21 Parts# List
Model
Passages
Connection Size
Tube Size
MKD21
2
G1/8"
6~8mm
MKD21S-S12/MKD21S-S18/MKD21S-S24/MKD21S-S36 drawing
MKD21S-S12/MKD21S-S18/MKD21S-S24/MKD21S-S36 Parts# List
Model
Passages
Connection Size
Tube Size
Signal(2A)
L(mm)
MKD21S-S12
2
G1/8"
6~8mm
12
22.5
MKD21S-S18
2
G1/8"
6~8mm
18
29.5
MKD21S-S24
2
G1/8"
6~8mm
24
40.1
MKD21S-S36
2
G1/8"
6~8mm
36
53.8
MKD21S-S56 drawing 2 in 2 out, connection size G1/8"+56XSignal(2A)
MKD21-S56 Parts# List
Model
Passages
Connection Size
Tube Size
Signal/(2A)
MKD21-S56
2
G1/8"
6~8mm
56
What is pneumatic rotary unions and pneumatic swivel joint?
Pneumatic rotary unions 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 unions 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,…



