Rotary Line Cupla
Quick couplings
The Nitto Kohki Rotary Line Cupla is a quick coupling with an integrated swivel joint, made of brass and steel with NBR seals. Two variants are offered: RT-type and RE-type. The swivel allows free rotation of the connected line around the coupling axis, preventing torsional stress and hose kinking in applications with rotating or pivoting tool carriers.
| Type | Material | Seal | Note |
|---|---|---|---|
| RT-type | Brass/Steel | NBR | Rotary connector, variant T |
| RE-type | Brass/Steel | NBR | Rotary connector, variant E |
Typical applications: Pneumatic tools with rotary motion, compressed-air supply to rotary tables and indexing units, robot end-effectors with pivoting movement, and any application where a rotating air line must avoid twisting and hose fatigue through a free-swivel adapter.
Technical data from the manufacturer catalogue
| Series | ROTARY LINE CUPLA |
|---|---|
| Body material | Body : Brass (Chrome plated), CUPLA : Steel (Chrome plated) |
| Seal material | Nitrile rubber (NBR) |
| Max working pressure | 1.5 MPa {15 kgf/cm2, 15 bar, 218 PSI} |
| Working temperature | Nitrile rubber (NBR): -20 °C to +60 °C |
| Valve structure | One-way shut-off |
| Applicable fluids | Air |
| Vacuum service | Not suitable for vacuum application in either connected or disconnected condition. |
| Size range | RT Type (for two branch lines): inlet HI CUPLA Plug 20PF, outlet 2 sockets for HI CUPLA Socket Model 20. RE Type (for three branch lines): inlet R 1/2, outlet 3 sockets for HI CUPLA Socket Model 20. |
| Catalogue page | C01en-b, 55 |
Operating principle
- Multiple outlets are available from single air supply source.
- Sideway air outlets are rotatable to any angle. Possible hose twists can be eliminated by the component couplings' swivel mechanism.
- Choose either RT type (2 outlets) or RE type (3 outlets) to suit your application.
- Each air outlet can be turned freely to any angle independently.
- The products come with dustproof caps.
All models of the series
RT - Manifold, inlet HI CUPLA Plug 20PF, two outlet sockets for HI CUPLA Socket Model 20
| Model | Coupling part | Application | Unspecified (g) |
|---|---|---|---|
| RT Type | Socket | Inlet: HI CUPLA Plug 20PF. Outlet: 2 sockets for HI CUPLA Socket Model 20 (2 pcs.) | 490 |
RE - Manifold, inlet R 1/2, three outlet sockets for HI CUPLA Socket Model 20
| Model | Coupling part | Application | Unspecified (g) |
|---|---|---|---|
| RE Type | Socket | Inlet: R 1/2. Outlet: 3 sockets for HI CUPLA Socket Model 20 (3 pcs.) | 660 |
Dimensions in millimetres. Values in brackets apply in the connected condition.
Legend: L = overall length; H = width across flats or outside dimension; D = socket outside diameter; A = hose barb length; C = sleeve dimension; T = thread or barb size; B = bore
Series comparison
| Series | Max working pressure | Size range | Valve structure | Applicable fluids |
|---|---|---|---|---|
| COMPACT ZEROSPILL CUPLA | 10 bar | Thread 1/8 inch, 1/4 inch | Two-way shut-off (Spill Reduction) | Air, Water |
| CUPLA HOSE with FULL BLOW CUPLA | 10 bar | Hose size ø5 mm×ø8 mm, ø6.5 mm×ø10 mm, ø8.5 mm×ø12.5 mm | One-way shut-off | Air |
| FLOW MONITOR | 10 bar | Rc 3/8 and Rc 1/2 | - | Water |
| ROTARY LINE CUPLA | 15 bar | RT Type (for two branch lines): inlet HI CUPLA Plug 20PF, outlet 2 sockets for HI CUPLA Socket Model 20. RE Type (for three branch lines): inlet R 1/2, outlet 3 sockets for HI CUPLA Socket Model 20. | One-way shut-off | Air |
| ANTI-VIBRATION PLUG HOSE | 15 bar | R 1/4 (SHA-3-2R), R 3/8 (SHA-3-3R) | One-way shut-off | Air |
| HI CUPLA BL | 15 bar | 1/4 inch, 3/8 inch, 1/2 inch (thread and hose barb); SN type for urethane hose: for 6.5 x 10 mm, 8 x 12 mm and 8.5 x 12.5 mm hose | One-way shut-off | Air, Water |
| FLATFACE CUPLA F35 | 350 bar | Thread 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch | Two-way shut-off (Spill Reduction) | Hydraulic oil |
| FLATFACE CUPLA FF | 350 bar | 3/8 inch, 1/2 inch, 3/4 inch, 1 inch (thread) | Two-way shut-off (Spill Reduction) | Hydraulic oil |
Choose ROTARY LINE CUPLA when one air supply at 1.5 MPa {15 kgf/cm2} has to feed two branch lines (RT type) or three branch lines (RE type) from a single free turn manifold, with the flow running from the inlet port to the outlet ports as the one-way shut-off structure requires. Single couplings such as HI CUPLA BL, NUT CUPLA, LOCK CUPLA 200, HI CUPLA Two Way Type, ROTARY PLUG and ROTARY FULL BLOW LINE CUPLA carry the same 1.5 MPa {15 kgf/cm2} and the same one-way shut-off, but each serves one connection instead of a manifold. COMPACT ZEROSPILL CUPLA, PURGE LINE CUPLA and TWIST PLUG are rated 1.0 MPa {10 kgf/cm2}, and COMPACT ZEROSPILL CUPLA is the choice only where two-way shut-off with spill reduction is required at that lower pressure.
Body and seal materials
| Body material |
|---|
| Body : Brass (Chrome plated) |
| CUPLA : Steel (Chrome plated) |
| Seal material | Mark | Working temperature | Remarks |
|---|---|---|---|
| Nitrile rubber | NBR | -20 °C to +60 °C | Standard material |
Further catalogue data
| Note | Value |
|---|---|
| Model variants | RT Type (for two branch lines), RE Type (for three branch lines) |
| Working pressure | 1.5 MPa / 15 kgf/cm2 / 15 bar / 218 PSI |
| Flow direction | Fluid must run from the inlet port to the outlet ports. |
| Minimum cross-sectional area (mm2), RT type | 33 |
| Minimum cross-sectional area (mm2), RE type | 33 |
| Dustproof caps | The products come with dustproof caps. |
| HI CUPLA Socket Model 20 detail drawing callouts on page 57 (unlabelled) | ø6.5, (7), 14, 28, 7, 3.2, 24, 16, (7), 38 |
| WAF | WAF stands for width across flats. |
| Flow rate | Pressure - Flow Characteristics chart on page 56 (test conditions - Fluid : Air, Plug : 20PM, all the socket valves are opened with 20PM), flow rate in m3/min (ANR) from 0 to 6.0 against pressure 0 to 0.7 MPa {0 to 7 kgf/cm2}, plotted for (1) RE Type when using 3 pieces of 20PM, (2) RT Type when using 2 pieces of 20PM, (3) RE Type when using 1 piece of 20PM, (4) RT Type when using 1 piece of 20PM. Numerical values are not printed in the page text. |
Interchangeability and size groups
Interchangeable with plugs of HI CUPLA models 10, 17, 20, 30 and 40. Interchangeable with each models of NUT CUPLA series and HI CUPLA series. Please see page 21 for 'HI CUPLA Series Interchangeability'.
Safety and application notes
- Fluid must run from the inlet port to the outlet ports.
- Fluid must run in the direction of the arrow.
- Not suitable for vacuum application in either connected or disconnected condition.
- The operable temperature range depends on the operating conditions.
- Before use, please be sure to read 'Safety Guide' described at the end of this book and 'Instruction Sheet' that comes with the products.
All technical data on this page is taken from the Nitto Kohki general catalogue Quick Connect Couplings C01en-b, page 55. The complete catalogue is available for download on this page.
