High Flow Cupla
Quick Couplings
The Nitto Kohki High Flow Cupla is a high-flow quick coupling for compressed air and general industrial media with an operating pressure depending on the series. Increased flow in brass or stainless steel.
As an authorised Nitto Kohki distributor we stock 18 variants of the High Flow Cupla - bodies in brass, stainless steel, FKM, EPDM seals, model series HFL-….
depending on the series - operating-pressure range for compressed air and general industrial media
brass, stainless steel - body materials; FKM, EPDM seals
Key feature - Increased flow in brass or stainless steel
18 variants in stock - model series HFL-…
| Parameter | Value |
|---|---|
| Type | high-flow quick coupling |
| Operating pressure | depending on the series |
| Body materials | brass, stainless steel |
| Seals | FKM, EPDM |
| Media | compressed air and general industrial media |
| Model series | HFL-… |
| Variants in range | 18 |
Typical applications: special applications in manufacturing, assembly and maintenance.
Technical data from the manufacturer catalogue
| Series | HI FLOW CUPLA / HI FLOW CUPLA BI Type |
|---|---|
| Body material | Stainless steel, Brass |
| Seal material | Ethylene-propylene rubber (EPDM), Fluoro rubber (FKM) |
| Max working pressure | 1.0 MPa {10 kgf/cm2} |
| Working temperature | Ethylene-propylene rubber (EPDM): -40 to +150 deg C | Fluoro rubber (FKM): -20 to +180 deg C |
| Valve structure | Two-way shut-off |
| Applicable fluids | Water, Temperature control refrigerant |
| Vacuum service | 1.3x10-1 Pa {1x10-3 mmHg}. Socket only: -, Plug only: -, When connected: Operational. |
| Size range | 1/4 inch, 3/8 inch, 1/2 inch |
| Catalogue page | C01en-b, 159 |
Operating principle
- Both socket and plug have built-in automatic shut-off valves.
- High flow rate type to increase cooling effect.
- Quick connection and disconnection of cooling pipes.
- Compact and space-saving design. Compared with the coupled length of SP CUPLA type A, that of HI FLOW CUPLA is reduced by 22%.
- Installation and maintenance can be done within a short time.
- BI Type: easy connection with stainless steel pipe.
- BI Type: connection to plastic hose is possible with optional hose connection kit.
- BI Type: connection to various tubes is also possible via the use of appropriate optional inserts.
All models of the series
HFL-P - Female thread
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | H | øD | C | T |
|---|---|---|---|---|---|---|---|---|---|
| HFL-2P | Plug | R 1/4 | 31 | 28 | 30 | Hex.17 | 18.5 | 16.5 | Rc 1/4 |
| HFL-3P | Plug | R 3/8 | 47 | 43 | 31 | Hex.21 | 23 | 18 | Rc 3/8 |
| HFL-4P | Plug | R 1/2 | 91 | 82 | 37.5 | Hex.29 | 32 | 22.5 | Rc 1/2 |
HFL-S - Female thread
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | H | øD | T |
|---|---|---|---|---|---|---|---|---|
| HFL-2S | Socket | R 1/4 | 110 | 99 | (47) | 19 | 26 | Rc 1/4 |
| HFL-3S | Socket | R 3/8 | 165 | 150 | (49) | 24 | 32 | Rc 3/8 |
| HFL-4S | Socket | R 1/2 | 231 | 211 | 60 | 29 | 35 | Rc 1/2 |
HFL-P-BI - For pipe connection (bite type tube fitting)
| Model | Coupling part | Application | Stainless steel (g) | L | H | øD | A | C | T | øB |
|---|---|---|---|---|---|---|---|---|---|---|
| HFL-2P-BI 1/4 | Plug | 6.35 mm (1/4 inch) pipe | 66 | (51.9) | Hex.20.64 (13/16 inch) | 23 | (15.4) | 16.5 | Hex.14.29 (9/16 inch) | (6.35) |
| HFL-2P-BI 3/8 | Plug | 9.53 mm (3/8 inch) pipe | 74 | (53.4) | Hex.20.64 (13/16 inch) | 23 | (17) | 16.5 | Hex.17.46 (11/16 inch) | (9.53) |
| HFL-3P-BI 3/8 | Plug | 9.53 mm (3/8 inch) pipe | 109 | (54.8) | Hex.26.99 (1 1/16 inch) | 29.5 | (17) | 18 | Hex.17.46 (11/16 inch) | (9.53) |
| HFL-3P-BI 1/2 | Plug | 12.7 mm (1/2 inch) pipe | 134 | (59) | Hex.26.99 (1 1/16 inch) | 29.5 | (23) | 18 | Hex.22.23 (7/8 inch) | (12.7) |
| HFL-4P-BI 1/2 | Plug | 12.7 mm (1/2 inch) pipe | 160 | (68.7) | Hex.28.58 (1 1/8 inch) | 32 | (23) | 22.5 | Hex.22.23 (7/8 inch) | (12.7) |
HFL-S-BI - For pipe connection (bite type tube fitting)
| Model | Coupling part | Application | Stainless steel (g) | L | H | øD | A | T | øB |
|---|---|---|---|---|---|---|---|---|---|
| HFL-2S-BI 1/4 | Socket | 6.35 mm (1/4 inch) pipe | 97 | (54.9) | Hex.20.64 (13/16 inch) | 26 | (15.4) | Hex.14.29 (9/16 inch) | (6.35) |
| HFL-2S-BI 3/8 | Socket | 9.53 mm (3/8 inch) pipe | 105 | (56.5) | Hex.20.64 (13/16 inch) | 26 | (17) | Hex.17.46 (11/16 inch) | (9.53) |
| HFL-3S-BI 3/8 | Socket | 9.53 mm (3/8 inch) pipe | 165 | (60.3) | Hex.26.99 (1 1/16 inch) | 32 | (17) | Hex.17.46 (11/16 inch) | (9.53) |
| HFL-3S-BI 1/2 | Socket | 12.7 mm (1/2 inch) pipe | 189 | (64.6) | Hex.26.99 (1 1/16 inch) | 32 | (23) | Hex.22.23 (7/8 inch) | (12.7) |
| HFL-4S-BI 1/2 | Socket | 12.7 mm (1/2 inch) pipe | 233 | (73.2) | Hex.28.58 (1 1/8 inch) | 35 | (23) | Hex.22.23 (7/8 inch) | (12.7) |
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 |
|---|---|---|---|---|
| HI FLOW CUPLA / HI FLOW CUPLA BI Type | 10 bar | 1/4 inch, 3/8 inch, 1/2 inch | Two-way shut-off | Water, Temperature control refrigerant |
| 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 |
| 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 |
Pick HI FLOW CUPLA when the cooling or temperature control line has to be closed on both sides, since every peer series in this group except COMPACT ZEROSPILL CUPLA is one-way shut-off. Against COMPACT ZEROSPILL CUPLA, which is also rated 1.0 MPa {10 kgf/cm2} and two-way shut-off, HI FLOW CUPLA is the high flow rate version with a coupled length 22% shorter than SP CUPLA type A. Where the line runs at 1.5 MPa {15 kgf/cm2}, HI CUPLA BL, LOCK CUPLA 200 or the other one-way shut-off series carry the higher pressure.
Body and seal materials
| Body material |
|---|
| Stainless steel |
| Brass |
| Seal material | Mark | Working temperature | Remarks |
|---|---|---|---|
| Ethylene-propylene rubber (EPDM) | - | -40 to +150 deg C | - |
| Fluoro rubber (FKM) | - | -20 to +180 deg C | - |
Further catalogue data
| Note | Value |
|---|---|
| Flow direction | Fluid flow can be bi-directional when socket and plug are connected. |
| Minimum cross-sectional area (mm2) | HFL-2P / HFL-2S: 32, HFL-3P / HFL-3S: 53, HFL-4P / HFL-4S: 91 |
| Maximum tightening torque, stainless steel, Nm {kgf cm} | HFL-2P / HFL-2S: 14 {143}, HFL-3P / HFL-3S: 22 {224}, HFL-4P / HFL-4S: 60 {612} |
| Maximum tightening torque, brass, Nm {kgf cm} | HFL-2P / HFL-2S: 9 {92}, HFL-3P / HFL-3S: 12 {122}, HFL-4P / HFL-4S: 30 {306} |
| BI Type body material | Stainless steel |
| BI Type applicable pipe size | 1/4 inch, 3/8 inch, 1/2 inch. See the stainless steel pipe, hose and tube size list for hose and tube size. |
| BI Type stainless steel pipe dia. | HFL-2SP-BI 1/4: 1/4 (6.35 mm), HFL-2SP-BI 3/8: 3/8 (9.53 mm), HFL-3SP-BI 3/8: 3/8 (9.53 mm), HFL-3SP-BI 1/2: 1/2 (12.7 mm), HFL-4SP-BI 1/2: 1/2 (12.7 mm) |
| BI Type hose connection nut (optional) | HFL-3SP-BI 1/2 and HFL-4SP-BI 1/2: E1-6x11 for hose 6 x 11 mm (ID x OD), E1-8x13.5 for hose 8 x 13.5 mm (ID x OD). Not offered for HFL-2SP-BI 1/4, HFL-2SP-BI 3/8, HFL-3SP-BI 3/8. |
| BI Type tube connection insert (optional), pipe 1/4 inch | DTI 4-2: tube 3.18 x 6.35 mm, E 2.3, L 11.9, A 6.35, D 3.18; DTI 4-2.5: tube 3.97 x 6.35 mm, E 2.7, L 11.9, A 6.35, D 3.97; DTI 4-2.72: tube 4.32 x 6.35 mm, E 2.7, L 11.9, A 6.35, D 4.32; DTI 4-3: tube 4.76 x 6.35 mm, E 3.5, L 11.9, A 6.35, D 4.76 |
| BI Type tube connection insert (optional), pipe 3/8 inch | DTI 6-3: tube 4.76 x 9.53 mm, E 3.0, L 14.3, A 9.53, D 4.76; DTI 6-4: tube 6.35 x 9.53 mm, E 4.8, L 14.3, A 9.53, D 6.35 |
| BI Type tube connection insert (optional), pipe 1/2 inch | DTI 8-4: tube 6.35 x 12.7 mm, E 4.8, L 19.1, A 12.7, D 6.35; DTI 8-6: tube 9.53 x 12.7 mm, E 7.9, L 19.1, A 12.7, D 9.53 |
| Flow rate | Flow rate - pressure loss characteristics graphs are printed on pages 160 and 161. Test conditions: fluid water, temperature 23 deg C +/-5 deg C. Page 160 curves: HFL-2S x HFL-2P, HFL-3S x HFL-3P, HFL-4S x HFL-4P. Page 161 curves (connected to stainless steel pipe): HFL-2S-BI 1/4 x HFL-2P-BI 1/4, HFL-2S-BI 3/8 x HFL-2P-BI 3/8, HFL-3S-BI 3/8 x HFL-3P-BI 3/8, HFL-3S-BI 1/2 x HFL-3P-BI 1/2, HFL-4S-BI 1/2 x HFL-4P-BI 1/2. |
Interchangeability and size groups
Socket and plug of different sizes cannot be connected. The same statement is printed for HI FLOW CUPLA and for HI FLOW CUPLA BI Type.
Safety and application notes
- Before use, please be sure to read the Safety Guide described at the end of this book and the 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 159. The complete catalogue is available for download on this page.
