Full Blow Cupla
Low pressure up to 19 bar
The Nitto Kohki Full Blow Cupla (FBH series) is a quick coupling in aluminium with an NBR seal, designed for full-flow blow-off operation without an internal check stop. The unobstructed bore allows higher flow rates at lower pressure drop than standard couplings. The series covers sizes 20, 30, 40, 65, 80, 85 and 110 in hose-barb (SH), male thread (SM), female thread (SF) and threaded connection (SN) configurations.
Aluminium body, NBR seal - lightweight construction for compressed air blow-off tools
Full-flow bore - minimised pressure drop for maximum flow to the downstream tool
Sizes 20-110 - wide selection for blow-off applications of varying scale
Connection types SH/SM/SF/SN - hose barb, male thread, female thread and threaded end to suit installation requirements
| Type | Material | Seal | Connection |
|---|---|---|---|
| FBH-20SH / 30SH / 40SH | Aluminium | NBR | Hose barb, sizes 20/30/40 |
| FBH-20SM / 30SM / 40SM | Aluminium | NBR | Male thread, sizes 20/30/40 |
| FBH-20SF / 30SF / 40SF | Aluminium | NBR | Female thread, sizes 20/30/40 |
| FBH-65SN / 80SN / 85SN / 110SN | Aluminium | NBR | Threaded end, sizes 65/80/85/110 |
Typical applications: High-flow compressed air blow-off tasks such as blow guns, blowdown fixtures on production machines, air drying of components after washing, conveying air transfer points, and compressed air installations where minimum coupling pressure drop directly affects the efficiency of the downstream tool.
Technical data from the manufacturer catalogue
| Series | FULL BLOW CUPLA |
|---|---|
| Body material | Aluminum alloy |
| Seal material | NBR (Nitrile rubber) |
| 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 | Thread and hose barb 1/4 inch, 3/8 inch, 1/2 inch. SN type for urethane hose: for dia. 6.5 mm x dia. 10 mm, dia. 8 mm x dia. 12 mm, dia. 8.5 mm x dia. 12.5 mm and dia. 11 mm x dia. 16 mm polyurethane hose. |
| Catalogue page | C01en-b, 49 |
Operating principle
- The flow rate is increased by up to 40% more than that of HI CUPLA.
- 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.
- Separation prevention mechanism prevents accidental disconnection of CUPLA, ensuring safe operation.
- The valve can be opened and closed while the socket and plug are connected.
- The weight is reduced by 30 to 45% compared with that of conventional CUPLA.
- Plug and socket with hose guard nut are also available (see page 68 of NK CUPLA HOSE for details).
- Unique full-open gate type valve mechanism realizes low pressure loss and high flow rate, which reduces required source air volume.
All models of the series
SH - Hose barb
| Model | Coupling part | Application | Aluminium (g) | L | A | T | øB |
|---|---|---|---|---|---|---|---|
| FBH-20SH | Socket | 1/4 inch hose | 70 | (77) | 30 | 9 | 5.5 |
| FBH-30SH | Socket | 3/8 inch hose | 74 | (81) | 34 | 11.3 | 8 |
| FBH-40SH | Socket | 1/2 inch hose | 85 | (83) | 36 | 15 | 10 |
SM - Male thread
| Model | Coupling part | Application | Aluminium (g) | L | H | T | øB |
|---|---|---|---|---|---|---|---|
| FBH-20SM | Socket | Rc 1/4 | 71 | (62) | Hex.22 | R 1/4 | 8 |
| FBH-30SM | Socket | Rc 3/8 | 75 | (62) | Hex.22 | R 3/8 | 11 |
| FBH-40SM | Socket | Rc 1/2 | 86 | (66) | Hex.22 | R 1/2 | 15 |
SF - Female thread
| Model | Coupling part | Application | Aluminium (g) | L | H | T |
|---|---|---|---|---|---|---|
| FBH-20SF | Socket | R 1/4 | 77 | (54.5) | Hex.22 | Rc 1/4 |
| FBH-30SF | Socket | R 3/8 | 69 | (54.5) | Hex.22 | Rc 3/8 |
| FBH-40SF | Socket | R 1/2 | 90 | (61) | Hex.26 | Rc 1/2 |
SN - For urethane hose connection
| Model | Coupling part | Application | Aluminium (g) | L | H | T | øB |
|---|---|---|---|---|---|---|---|
| FBH-65SN | Socket | 6.5 mm x 10 mm urethane hose | 64 | (64) | Hex.22 | Hex.17 | 5.5 |
| FBH-80SN | Socket | 8 mm x 12 mm urethane hose | 67 | (66) | Hex.22 | Hex.19 | 7.5 |
| FBH-85SN | Socket | 8.5 mm x 12.5 mm urethane hose | 68 | (66) | Hex.22 | Hex.19 | 7.5 |
| FBH-110SN | Socket | 11 mm x 16 mm urethane hose | 86 | (71) | Hex.26 | Hex.24 | 10 |
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 CUPLA | 10 bar | Thread 1/8 inch; tube barb for ø4 x ø6 and ø6 x ø8 tube | Two-way shut-off | Air, Water |
| CUBE CUPLA | 10 bar | 4 mm and 6 mm ID tube, 1/8 inch | Two-way shut-off, one-way shut-off or straight through, depending on the combination of valved and valveless socket and plug. | Air, Water |
| FULL BLOW CUPLA | 15 bar | Thread and hose barb 1/4 inch, 3/8 inch, 1/2 inch. SN type for urethane hose: for dia. 6.5 mm x dia. 10 mm, dia. 8 mm x dia. 12 mm, dia. 8.5 mm x dia. 12.5 mm and dia. 11 mm x dia. 16 mm polyurethane hose. | One-way shut-off | Air |
| HI CUPLA 200 | 15 bar | Thread and hose barb 1/4 inch, 3/8 inch, 1/2 inch. Tube barb (Tube fitter): Polyurethane tube outer dia. 6 +/-0.1, 8 +/-0.15, 10 +/-0.15; Polyamide tube outer dia. 6 +0.05/-0.08, 8 +0.05/-0.1, 10 +0.05/-0.1; Fluorine contained resin tube outer dia. 6 +/-0.07, 8 +/-0.07, 10 +/-0.07. | One-way shut-off | Air |
| HI CUPLA ACE | 15 bar | Thread and hose barb 1/4 inch, 3/8 inch; PN, SN, PNG and SNG types for ø5 mm x ø8 mm, ø6 mm x ø9 mm, ø6.5 mm x ø10 mm, ø8 mm x ø12 mm and ø8.5 mm x ø12.5 mm polyurethane hose | One-way shut-off | Air, Water |
| HI CUPLA | 15 bar | Thread and hose barb 1/8 inch to 1 inch, 1/4 inch to 1 inch hose | One-way shut-off | Air, Water |
| LINE CUPLA 200 | 15 bar | - | One-way shut-off | Air |
| LEVER LOCK CUPLA | 18 bar | Metal body: 3/4 inch to 4 inch. Plastic body: 3/4 inch, 1 inch, 1 1/2 inch, 2 inch, 3 inch. | Straight through | Water, Hydraulic oil, Air, Powder, Steam |
Choose FULL BLOW CUPLA when the air line works at up to 1.5 MPa {15 kgf/cm2} and the 1.0 MPa {10 kgf/cm2} of MICRO CUPLA, SMALL CUPLA, COMPACT CUPLA, CUBE CUPLA and SUPER CUPLA is not enough. Against the equally rated HI CUPLA, HI CUPLA 200, LINE CUPLA 200 and HI CUPLA ACE it adds the purge of the residual air pressure in the plug and valve opening and closing in the connected state, while staying one-way shut-off and interchangeable with plugs of the HI CUPLA series. Where the line itself has to shut off, it is preferable to the straight through LEVER LOCK CUPLA.
Body and seal materials
| Body material |
|---|
| Aluminum alloy |
| Seal material | Mark | Working temperature | Remarks |
|---|---|---|---|
| Nitrile rubber | NBR | -20 °C to +60 °C | Standard material |
Further catalogue data
| Note | Value |
|---|---|
| Maximum tightening torque 1/4 inch | 14 Nm {143 kgf cm} |
| Maximum tightening torque 3/8 inch | 22 Nm {224 kgf cm} |
| Maximum tightening torque 1/2 inch | 60 Nm {612 kgf cm} |
| Tightening torque range, SN type for urethane hose | 9 to 11 Nm {92 to 112 kgf cm} |
| Mounting on urethane hose | To mount on urethane hose, slide it over to the hose barb and tighten the nut until it is flush against the hose barb base. It is recommended that grease is applied to the inside of the nut (threaded part and hose contact part) for easy tightening. |
| Flow direction | Fluid must run from socket to plug. |
| Socket body diameter from the drawing (mm) | 28.5 for the SH, SM, SF and SN types |
| Optional accessory | SLEEVE COVER, a soft plastic cover for FULL BLOW CUPLA. Easier sliding operation is achieved by attaching an additional plastic cover over the socket sleeve of FULL BLOW CUPLA. Plastic covers reduce the risk of damage if CUPLA strikes other components or products. See page 164 for the details. |
| 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. |
| Minimum cross-sectional area (mm2) - socket FBH-20SH | 17PH 16, 20PH 20, 30PH 24, 40PH 24, 10PM 13, 20PM 24, 30PM 24, 40PM 24, 20PF 24, 30PF 24, 40PF 24 |
| Minimum cross-sectional area (mm2) - socket FBH-30SH | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-40SH | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-20SM | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-30SM | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-40SM | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-20SF | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-30SF | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-40SF | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-65SN | 17PH 16, 20PH 20, 30PH 24, 40PH 24, 10PM 13, 20PM 24, 30PM 24, 40PM 24, 20PF 24, 30PF 24, 40PF 24 |
| Minimum cross-sectional area (mm2) - socket FBH-80SN | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-85SN | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Minimum cross-sectional area (mm2) - socket FBH-110SN | 17PH 16, 20PH 20, 30PH 44, 40PH 44, 10PM 13, 20PM 44, 30PM 44, 40PM 44, 20PF 44, 30PF 44, 40PF 44 |
| Flow rate | Pressure - Flow Rate Characteristics graph on page 50 comparing FULL BLOW CUPLA with HI CUPLA, flow rate in m3/min (ANR) against pressure in MPa {kgf/cm2}, tested with air. Curves are given for FBH-20SM x 20PM, for FBH-30SM x 30PM / FBH-40SM x 40PM and for HI CUPLA 30SM x 30PM. |
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
- Note: Direct mounting of FULL BLOW CUPLA to percussive and vibrating tools should be avoided.
- Fluid must run from socket to plug.
- Not suitable for vacuum application in either connected or disconnected condition.
- 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 49. The complete catalogue is available for download on this page.
