ROTARY UNITS
SPECIAL VERSIONS
EXAMPLES
Special rotary distributor
Our custom rotary distributors connect stationary and rotating machine components in every conceivable configuration – reliably, precisely, and specifically designed for extreme applications.
They enable the safe transfer of media, even under extreme conditions – from helium cooling for wind turbine superconductors to aggressive media in the chemical industry.
We offer the right custom rotary distributor for every application: from compact designs to complex multi-channel systems with customer-specific material combinations. We also solve unusual requirements in close coordination with your design team.
Our designs combine mechanical precision with intelligent media separation – ideal for demanding applications in rotary indexing tables, coating systems, and high-temperature processes.
KONSTANDIN’s particular strength lies in the manufacture of rotary unions for special applications that go beyond standard solutions.
Your benefits with a special rotary distributor
Tailor-made solutions for extreme applications and special media; custom material combinations for optimal media compatibility; combined systems integrating media and power transmission in a single unit; modular design (e.g., compatible with Profibus, Ethernet, or Fast Ethernet); compact designs for tight installation spaces on rotary indexing tables.
Unique worldwide: solutions for specialized wind turbine generators.
Do you need a custom-engineered rotary union? Talk to our technical experts – we provide personal consultation!
- Very high pressure
- More than 8 channels
- Different duct sizes and/or connections
- High rotation speeds
- High/ low temperature range
- Flange connections
- Complete underwater operation
- Combination for welding current and inert gas
- Etc.
In order to find the right product for your application as quickly as possible,
advice is essential.
Talk to the experts at KONSTANDIN first.
On this page you will find some examples of special rotary unions which have been individually designed and manufactured in-house according to customer requirements.
underwater use
Article no. ZK5520-H
Technical Data
| Channels: | 12 |
| Connection housing: | G3/8″ |
| Rotation speed: | 40 U/min |
| Rotary movement: | continuous, clocking |
| Pmax: | 70 bar |
| Medium: | Hydraulics |
| Temperature range: | +5°C to +40°C |
| Features: | – Extra-sealed ball bearings – stainless steel |
| Application: | Underwater |
Rotary union for
underwater use
Article no. ZK5521-H
Typ DDF-12-1/8″-H-SO
Technical Data
| Channels: | 12 |
| Connection housing: | G1/8″ |
| Rotation speed: | 50 U/min |
| Rotary movement: | continuous, clocking |
| pmax: | 10 bar |
| Medium: | Compressed air |
| Temperature range: | +5°C to +40°C |
| Features: | – Extra-sealed ball bearings – stainless steel |
| Application: | Underwater |
current-carrying shaft
Article no. ZK5276-01
Typ DDF-2-1/2″-L-01-SO
Technical Data
| Channels: | 2 |
| Connection housing: | G1/4″ |
| Rotation speed: | max. 5 U/min |
| Rotary movement: | continuous |
| Pmax: | 8 bar |
| Medium: | Cooling water |
| Temperature range: | 0°C to +60°C |
| Features: | – Pneumatic drive – Leakage monitoring – Churrent-carrying shaft |
| Application: | coating systems |
Rotary union with
hollow shaft
Article no. ZK5172-H
Typ DDF-4-3/4″-L-H
Technical Data
| Channels: | 4 + 2 Leakage channels |
| Connection housing: | G3/4″ / G1/2″ / G1/4″ |
| Rotational speed: | 25 U/min |
| Rotational movement: | clocking |
| pmax: | 3 bar / 8 bar |
| Medium: | Water / Compressed air |
| Temperature range: | +10°C to +40°C |
| Special features: | – Hollow shaft (DIA 132) – Ball bearings with sealing lips – Special seals |
Rotary union
for abrasive media
Article no. ZK5174-H
Typ DDF-1-1/8″-H
Technical Data
| Channels: | 1 |
| Connection housing: | G1/8″ |
| Shaft connection: | M14X1 |
| Rotational speed: | 800 U/min |
| Drehbewegung: | clocking |
| pmax: | 2 bar |
| Medium: | Metall powder-gas mixture |
| Temperature range: | 0°C to +60°C |
| Special features: | – Miniature design – Special seals |
Rotary uniosn with
torque transmission
Article no. ZK5147-H-SO-01
Technical Data
| Channels: | 3 |
| Connection housing: | M8 |
| Connection shaft | DIA 5 |
| Speed: | 100 rpm |
| Rotary movement: | contiuously |
| Pmax: | -0,8 bar / 8 bar |
| Medium: | compressed air/ vacuum |
| Temperature range: | +5°C to +60°C |
| Features: | extended shaft with feather key for transmitting torque |
| Application: | Medical technology |
Rotary unions with special shaft for
transmitting torque
Article no. ZK5169-H
Typ DDF-8-1/4″-H-SO
Technical Data
| Channels: | 8 |
| Connection housing: | G1/4″ |
| Connection shaft: | DIA 8 |
| Speed: | 100 rpm |
| Rotary movement: | contiuosly |
| Pmax: | 8 bar |
| Medium: | water |
| Temperature range: | +5°C to +60°C |
| Features: | – axiale Abgänge am Gehäuse – Special connection to existing machine – Special shaft for transmitting torque to the shaft – Special geometry |
| Application: | Kunststoffspritz- gussmaschine |
Rotary unions
in sandwich construction
Article no. ZK5140
Type DDF-15-3/8“-SO
TECHNICAL DATA
| Channels: | 15 |
| Connection: | G 3/8“ |
| Rotation speed: | 35 rpm |
| Rotary movement: | continuous |
| Pmax: | 8 bar / -0,8 bar |
| Medium: | Compressed air / vacuum |
| Temperature range: | 0°C to +80°C |
| Features: | – sandwich construction, – radial outlets on the shaft |
| Application: | Special mechanical engineering |
Rotary unions
for low temperatures (up to -20°C)
Article no. ZK5120
Type DDF-2-M33x2-SO
TECHNICAL DATA
| Channels: | 2 |
| Connection: | M 33×2 |
| Rotation speed: | 25 rpm |
| Rotary movement: | continuous |
| Pmax: | 23 bar |
| Medium: | helium |
| Temperature range: | -20°C to +50°C |
| Features: | – Preparation for current transformer – special seals |
| Application: | Wind turbine |
Rotary unions with
Connection at the front
Article no. ZK5159
Type DDF-8-M5-SO
TECHNICAL DATA
| Channels: | 8 |
| Connection: | M5 / DIA 03 |
| Rotation speed: | 200 rpm |
| Rotary movement: | pulsed |
| Pmax: | 8 bar / -0,8 bar |
| Medium: | Compressed air / vacuum |
| Temperature range: | 0°C to +80°C |
| Features: | – Special geometry (small housing diameter) – frontal connection housing – Ball bearings with sealing lips |
| Application: | Special mechanical engineering, Installation in rotary indexing table |
Rotary unions
in sandwich construction
Article no. ZK5151
Type DDF-4-1 1/4“-SO
TECHNICAL DATA
| Channels: | 4 |
| Connection: | G 1 1/4“ |
| Rotation speed: | 60 rpm |
| Rotary movement: | continuous pulsed |
| Pmax: | 16 bar |
| Medium: | Compressed air / vacuum |
| Temperature range: | 0°C to +80°C |
| Features: | – sandwich construction – hollow shaft |
| Application: | Special mechanical engineering |
Rotary union with hollow shaft
and special seals
Article no. ZK5160
Type DDF-2-1/8“-SO
TECHNICAL DATA
| Channels: | 2 |
| Connection: | G 1/8“ |
| Rotation speed: | 250 rpm |
| Drehbewegung: | continuous |
| Pressure: | 10 bar / -0,8 bar |
| Medium: | Compressed air / vacuum |
| Temperature range: | +10°C to +100°C |
| Features: | – Special seals – Hollow shaft with media handover to customer shaft (DIA 40 H7) |
| Application: | Robot application |
Rotary union with
Medium-transfer to customer shaft
Article no. ZK5125
Type DDF-1-1/4“-SO
TECHNICAL DATA
| Channels: | 1 |
| Connection: | G 1/4“ |
| Rotation speed: | 60 rpm |
| Drehbewegung: | continuous |
| Pressure: | 8 bar / -0,8 bar |
| Medium: | Compressed air / vacuum |
| Temperature range: | 0°C to +80°C |
| Features: | – Special seals – Special geometry – Medium-transfer to customer shaft |
| Application: | Special mechanical engineering |
Rotary union for installation
in rotary indexing table
Article no. ZK5109-SO-01
Type DDF-2-M5-SO
TECHNICAL DATA
| Channels: | 2 |
| Connection: | M5 / DIA 03 |
| Rotation speed: | 200 rpm |
| Drehbewegung: | clocking, oscillating |
| Pmax: | 10 bar / -0,8 bar |
| Medium: | compressed air / vacuum |
| Temperature range: | +10°C to +80°C |
| Features: |
– Special geometry for installation in rotary indexing tables |
| Application: | – Installation in rotary indexing table – automation technology |
Rotary union with hollow
shaft in different sizes
Article no. ZK5126
Type DDF-2-M5-SO
TECHNICAL DATA
| Channels: | 2 |
| Connection housing: | M 5 |
| Connection shaft: | Ø 4 mm |
| Rotation speed: | 10 rpm |
| Drehbewegung: | pulsed |
| Pmax: | 8 bar |
| Medium: | Compressed air |
| Temperature range: | 0°C to +80°C |
| Features: | – Special seals – Special geometry – Hollow shaft (28 mm diameter) |
| Application: | Special mechanical engineering |
Rotary unions
in stainless steel
Article no. ZK5111
Type DDF-3-1/8“-H-SO
TECHNICAL DATA
| Channels: | 3 |
| Connection: | G 1/8″ |
| Rotation speed: | 250 rpm |
| Rotary movement: | pulsed |
| Pmax: | 70 bar |
| Medium: | Compressed air, CO² , aerosol |
| Temperature range: | 0°C to +80°C |
| Features: | – Special seals – Special media – Special geometry – Stainless-steel design – Hollow bore in shaft (ø25mm) |
| Application: | Cryogenic honing process with ATS system |
Rotary unions
in miniature design
Article no. ZK5496
Type DDF-1-M5
TECHNICAL DATA
| Channels: | 1 |
| Connection: | M5 |
| Rotation speed: | 3000 rpm |
| Rotary movement: | continuous |
| Pmax: | 16 bar |
| Medium: | Compressed air |
| Temperature range: | 0°C to +80°C |
| Features: | miniature design (little installation space at the customer) |
Combined rotary union for standar
and aggressive media
Article no. ZK5583-SO-01
Type DDF-8-1/4 + DDF-1-1/2-H-L
TECHNICAL DATA
| Channels: | 8+1 |
| Connection: | G 1/4″ + G 1/2″ |
| Rotation speed: | 50 rpm |
| Rotary movement: | continuous |
| Pmax: | 10 bar + 2 bar |
| Medium: | Druckluft + Peroxid |
| Temperature range: | 0°C to +70°C |
| Features: | – 2-fold combined – Special seals |
Rotary union
with large flow
Article no. ZK1189-SO-01
Type DDF-1-2
TECHNICAL DATA
| Channels: | 1 |
| Connection: | G 2″ |
| Rotation speed: | 50 rpm |
| Rotary movement: | continuous |
| Pmax: | 10 bar |
| Medium: | Compressed air |
| Temperature range: | 0°C to +80°C |
| Features: | – Special seals – large flow |
Rotary unions
with 8 Channels
Article no. ZK5559-H
Type DDF-8-1/4-SO-01
TECHNICAL DATA
| Channels: | 8 |
| Connection: | G 1/4″ |
| Rotation speed: | 15 rpm |
| Rotary movement: | 180° in 2 sec |
| Pmax: | 10 bar |
| Medium: | Water |
| Temperature range: | 0°C to +70°C |
Vacuum rotary union
with flange connection
Article no. ZK5587 / ZK5588
Types DDF-1-16 and DDF-1-25
TECHNICAL DATA
| Channels: | 1 |
| Connection: | flange NW 16 and NW 25 |
| Rotation speed: | 10 rpm |
| Rotary movement: | continuous |
| Pmax: | -1 bar / 16 bar |
| Medium: | Vacuum / compressed air / nitrogen |
| Temperature range: | 0°C to +100°C |
| Features: | – flange connection – suitable for nitrogen environmen |
Rotary union
with special seals
Article no. ZK5545-SO-02
Type DDF-4-1/4-SO-02
TECHNICAL DATA
| Channels: | 4 |
| Connection: | G 1/4″ |
| Rotation speed: | 45 rpm |
| Rotary movement: | continuous pulsed |
| Pmax: | 10 bar |
| Medium: | Compressed air |
| Temperature range: | 10°C to +60°C |
| Features: | – Special seals – Hollow shaft with through hole DIA 60 |
Rotary unions
in stainless steel
Article no. ZK5515A-H-SO-02
Type DDF-8-1/2-H-SO-02
TECHNICAL DATA
| Channels: | 8 |
| Connection: | G 1/2″ |
| Rotation speed: | 15 rpm |
| Pmax: | 10 bar |
| Medium: | Nitrogen / vacuum |
| Temperature range: | 0°C to +80°C |
| Features: | – Special shaft for torque transmissions – modular system |
| Application: | Packaging machines |
Combined air inlet: at the front and on the shaft circumference (16 channels)
Article no. ZK5554
Type DDF-16-1/8
TECHNICAL DATA
| Channels: | 16 |
| Connection: | G 1/8″ |
| Rotation speed: | 10 rpm |
| Pmax: | 6 bar |
| Medium: | Compressed air |
| Temperature range: | 0°C to +80°C |
| Features: | – Channels according to customer specifications – combined air inlet: at the front and on the shaft circumference |