Rotary Plug
Quick Couplings
The Nitto Kohki Rotary Plug is a rotary plug for compressed air with an operating pressure depending on the series. A rotary plug, gentle on the hose.
As an authorised Nitto Kohki distributor we stock 3 variants of the Rotary Plug - bodies in steel, NBR seals, model series RL-….
| Parameter | Value |
|---|---|
| Type | rotary plug |
| Operating pressure | depending on the series |
| Body materials | steel |
| Seals | NBR |
| Media | compressed air |
| Model series | RL-… |
| Variants in range | 3 |
Typical applications: special applications in manufacturing, assembly and maintenance.
Technical data from the manufacturer catalogue
| Series | ROTARY PLUG |
|---|---|
| Body material | Steel (Nickel plated) |
| Seal material | Nitrile rubber (NBR) |
| Max working pressure | 1.5 MPa {15 kgf/cm2} |
| Working temperature | Nitrile rubber (NBR): -20 to +80 deg 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 | 1/4 inch, 3/8 inch |
| Catalogue page | C01en-b, 63 |
Operating principle
- Rotary function allows 360 deg swivelling.
- Big improvement for handling of pneumatic tools.
- Rotary neck plug for hose connection to pneumatic tools and pneumatic devices.
- Fits at 45 deg angle to the tool eliminating annoying offset load caused by connected hose.
- Ideal compact design enables optimum workability by simple body structure. Now far lighter and smaller than conventional models.
- New dust-proof design for increased durability.
- For air tackers, nailers, impact wrenches and other pneumatic tools.
- Ideal body angle achieved by the plug allows comfortable use of tools even in narrow places and overhead work.
All models of the series
PM - Male thread
| Model | Coupling part | Application | Steel (g) | L | øD | T |
|---|---|---|---|---|---|---|
| RL-20PM | Plug | Rc 1/4 | 52 | (52.1) | (34.1) | R 1/4 |
| RL-30PM | Plug | Rc 3/8 | 73 | (50.8) | (32.8) | R 3/8 |
PFF - Female thread
| Model | Coupling part | Application | Steel (g) | L | øD | T |
|---|---|---|---|---|---|---|
| RL-20PFF | Plug | G 1/4 | 57 | (51.3) | (33.3) | G 1/4 |
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 PLUG | 15 bar | 1/4 inch, 3/8 inch | 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 |
ROTARY PLUG is the plug to take when the hose has to follow the tool: at 1.5 MPa {15 kgf/cm2} and one-way shut-off it matches the pressure class and valve type of HI CUPLA BL, NUT CUPLA, LOCK CUPLA 200, HI CUPLA Two Way Type, ROTARY LINE CUPLA and ROTARY FULL BLOW LINE CUPLA, so it changes neither the pressure class nor the valve behaviour of such a line. TWIST PLUG and COMPACT ZEROSPILL CUPLA stay at 1.0 MPa {10 kgf/cm2}; COMPACT ZEROSPILL CUPLA shuts off on both sides and is the choice when spill at disconnection weighs more than the swivel. ROTARY PLUG is offered in 1/4 inch and 3/8 inch, so within that size range the decision rests on the swivel requirement rather than on the pressure rating.
Body and seal materials
| Body material |
|---|
| Steel (Nickel plated) |
| Seal material | Mark | Working temperature | Remarks |
|---|---|---|---|
| Nitrile rubber (NBR) | - | -20 to +80 deg C | - |
Further catalogue data
| Note | Value |
|---|---|
| Maximum tightening torque, Nm {kgf cm} | 1/4 inch : 14 {143}, 3/8 inch : 22 {224} |
| Flow direction | Fluid flow can be bi-directional when socket and plug are connected. |
| Minimum cross-sectional area (mm2) | RL-20PM : 28, RL-30PM : 28, RL-20PFF : 28 |
| Working pressure, other units | 15 kgf/cm2 / 15 bar / 218 PSI |
| Neck angle | 135 deg as dimensioned on the drawings, that is 45 deg to the tool |
Interchangeability and size groups
Interchangeable with sockets of HI CUPLA models 10, 17, 20, 30, 40 and 60. Interchangeable with each models of NUT CUPLA series and HI CUPLA series (except models 400, 600, and 800). Please see page 21 for HI CUPLA Series Interchangeability.
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 63. The complete catalogue is available for download on this page.
