Rotary Full Blow Line Cupla
Quick couplings
The Nitto Kohki Rotary Full Blow Line Cupla is a rotating quick-release coupling with Full Blow function that permits 360-degree rotation of the connected hose line while simultaneously providing full compressed-air flow even with the plug only partially engaged. The range covers two types in zinc alloy with NBR seal: FBH-RT (T-type) and FBH-RE (E-type). The rotary bearing design prevents hose twisting on rotating work machines and rotary tables.
| Type | Version | Material | Seal | Function |
|---|---|---|---|---|
| FBH-RT | T-type | Zinc alloy | NBR | Rotary Full Blow, T-connection |
| FBH-RE | E-type | Zinc alloy | NBR | Rotary Full Blow, E-connection |
Both types are compatible with the Nitto Kohki HI Cupla socket system.
Typical applications: Compressed-air supply on rotary tables and indexing machines, blow nozzles on rotating machining centres, hose connections on swivel arms and rotating workstations, and cleaning applications on carousel assembly lines where both hose twist prevention and Full Blow function are required simultaneously.
Technical data from the manufacturer catalogue
| Series | ROTARY FULL BLOW LINE CUPLA |
|---|---|
| Body material | Zinc alloy |
| 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 outlets): inlet Plug (20PFF), outlet FULL BLOW CUPLA. RE type (For three outlets): inlet R 1/2, outlet FULL BLOW CUPLA. |
| Catalogue page | C01en-b, 59 |
Operating principle
- Multiple outlets are available from single air supply source.
- Sideway air outlets are rotatable to any angle.
- Choose either RT type (2 outlets) or RE type (3 outlets) to suit your application.
- The flow rate increases by 40% to 50% over that of ROTARY LINE CUPLA RT type/RE type.
- During connection and disconnection, the valve is closed, enabling connection/disconnection under zero line pressure.
- When the sleeve of socket is returned to its original position, the purge mechanism releases the residual air pressure in the plug, eliminating unpleasant popping noise and hose whip motion on disconnection.
- Built-in separation prevention mechanism prevents accidental disconnection of CUPLA, ensuring safe operation.
- The valve can be opened and closed while the socket and plug is connected.
All models of the series
FBH-RT - Inlet plug 20PFF, two FULL BLOW CUPLA outlets
| Model | Coupling part | Application | Total (g) |
|---|---|---|---|
| FBH-RT | Socket | For two branch lines. Inlet : 1/4 inch HI CUPLA (20PFF). Outlet : FULL BLOW CUPLA (2 pcs.). Fluid must run in the direction of the arrow. | 358 |
FBH-RE - Inlet R 1/2 male thread, three FULL BLOW CUPLA outlets
| Model | Coupling part | Application | Total (g) |
|---|---|---|---|
| FBH-RE | Socket | For three branch lines. Inlet : R 1/2. Outlet : FULL BLOW CUPLA (3 pcs.). Fluid must run in the direction of the arrow. | 527 |
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 FULL BLOW LINE CUPLA | 15 bar | RT type (For two outlets): inlet Plug (20PFF), outlet FULL BLOW CUPLA. RE type (For three outlets): inlet R 1/2, outlet FULL BLOW CUPLA. | 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 FULL BLOW LINE CUPLA when one air supply of up to 1.5 MPa {15 kgf/cm2} has to feed two or three outlets that each swivel to any angle, which the single-outlet siblings HI CUPLA BL, NUT CUPLA, LOCK CUPLA 200, HI CUPLA Two Way Type, ROTARY PLUG and TWIST PLUG do not do. Against ROTARY LINE CUPLA, rated the same 1.5 MPa {15 kgf/cm2} and likewise one-way shut-off, it adds the valve that lets connection and disconnection take place under zero line pressure and the purge of the residual air pressure in the plug. PURGE LINE CUPLA and TWIST PLUG stop at 1.0 MPa {10 kgf/cm2}, PURGE HI CUPLA reaches 1.5 MPa {15 kgf/cm2} only in the PVR type, and the two-way shut-off COMPACT ZEROSPILL CUPLA at 1.0 MPa {10 kgf/cm2} addresses spill rather than branching.
Body and seal materials
| Body material |
|---|
| Zinc alloy |
| Seal material | Mark | Working temperature | Remarks |
|---|---|---|---|
| Nitrile rubber | NBR | -20 °C to +60 °C | Standard material |
Further catalogue data
| Note | Value |
|---|---|
| Pressure unit conversion | 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 | FBH-RT 44 mm2, FBH-RE 44 mm2 |
| Maximum tightening torque (FBH-RE type) | Size (thread) 1/2 inch. The torque value is not legible in the supplied page text and is therefore not recorded. |
| Working temperature range | The working temperature values are not legible in the supplied page text and are therefore not recorded. |
| Flow rate | Pressure - flow rate characteristics are given as a graph comparing ROTARY FULL BLOW LINE CUPLA with ROTARY LINE CUPLA. Test conditions: fluid air, plug 20PM. Curves: 1 FBH-RE type when using 3 pieces of 20PM, 2 RE type when using 3 pieces of 20PM, 3 FBH-RT type when using 2 pieces of 20PM, 4 RT type when using 2 pieces of 20PM. Graph range 0 to 8.0 m3/min (ANR) against 0 to 0.7 MPa {0 to 7 kgf/cm2}. |
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. Not interchangeable with some plugs of plastic HI CUPLA 250 (discontinued product). Please see page 21 for "HI CUPLA Series Interchangeability".
Safety and application notes
- Before use, please be sure to read "Safety Guide" described at the end of this book and "Instruction Sheet" that comes with the products.
- How it works, step 1 - open the valve: only after connection with the plug, you can slide the socket sleeve B toward the plug in order to open the built-in valve. Full flow path is then obtained.
- How it works, step 2 - lock the sleeve: rotate the flange counterclockwise to lock the sleeve B. Without unlocking the plug you cannot disconnect.
- How it works, step 3 - purge the residual air: to disconnect the plug, first turn the flange back to its original position for unlocking and then pull the sleeve B back to the original position. The built-in valve will be closed to purge the residual air pressure. Air will be purged out under the sleeve B.
All technical data on this page is taken from the Nitto Kohki general catalogue Quick Connect Couplings C01en-b, page 59. The complete catalogue is available for download on this page.
