Purge Line Cupla
Quick Couplings
The Nitto Kohki Purge Line Cupla is an inline coupling with purge function for compressed air and general industrial media with an operating pressure depending on the series. Inline purging for media changes.
As an authorised Nitto Kohki distributor we stock 1 variants of the Purge Line Cupla - bodies in brass, NBR seals, model series RE-PV-30.
| Parameter | Value |
|---|---|
| Type | inline coupling with purge function |
| Operating pressure | depending on the series |
| Body materials | brass |
| Seals | NBR |
| Media | compressed air and general industrial media |
| Model series | RE-PV-30 |
| Variants in range | 1 |
Typical applications: special applications in manufacturing, assembly and maintenance.
Technical data from the manufacturer catalogue
| Series | PURGE LINE CUPLA |
|---|---|
| Body material | Brass (Chrome plated) |
| Seal material | NBR |
| Max working pressure | 1.0 MPa {10 kgf/cm2} |
| 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 | Inlet R 1/2, outlet socket (PV-30SM) |
| Catalogue page | C01en-b, 54 |
Operating principle
- Residual pressure can be released by a mere lever turn. Very smooth connection/disconnection!
- Single action, just push in the plug to connect regardless of internal pressure in socket.
- No unpleasant noise of air pressure discharge and no hose whip motion on disconnection for safety operation.
- Safe design - socket valve will not open or close unless plug is connected.
- Even after connection, a lever turn will open/close valve with perfect control of air flow or line shut-off.
- Enables simultaneous air supply to three outlets from a single air line. (A single outlet PURGE HI CUPLA is also available - see the pages of PURGE HI CUPLA for details.)
All models of the series
RE-PV-30 - Male thread inlet R 1/2, three outlet sockets
| Model | Coupling part | Application | Brass (g) | øHex (WAF) | øInlet thread |
|---|---|---|---|---|---|
| RE-PV-30 | Socket | R 1/2 inlet, three PV-30SM outlets | 1090 | 22 | R 1/2 |
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 |
|---|---|---|---|---|
| PURGE LINE CUPLA | 10 bar | Inlet R 1/2, outlet socket (PV-30SM) | One-way shut-off | Air |
| 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 |
Choose PURGE LINE CUPLA when one air line has to feed three outlets and residual pressure must be released before disconnection: the lever on each PV-30SM outlet socket opens and closes the valve even after connection, which the plain one-way shut-off siblings HI CUPLA BL, NUT CUPLA, LOCK CUPLA 200, HI CUPLA Two Way Type, ROTARY LINE CUPLA, ROTARY FULL BLOW LINE CUPLA, ROTARY PLUG and TWIST PLUG do not offer. For a single outlet with the same purge function, PURGE HI CUPLA is the counterpart. Its working pressure is 1.0 MPa {10 kgf/cm2}, so lines running at 1.5 MPa {15 kgf/cm2} call for one of the 1.5 MPa {15 kgf/cm2} series instead, and where two-way shut-off with reduced spillage is required, COMPACT ZEROSPILL CUPLA applies.
Body and seal materials
| Body material |
|---|
| Brass (Chrome plated) |
| Seal material | Mark | Working temperature | Remarks |
|---|---|---|---|
| Nitrile rubber (NBR) | - | -20 °C to +60 °C | Standard material |
Further catalogue data
| Note | Value |
|---|---|
| Number of outlet ports | 3 |
| Pressure units | 1.0 MPa / 10 kgf/cm2 / 10 bar / 145 PSI |
| Maximum tightening torque | Size (Thread) 1/2 inch: 30 Nm {306 kgf cm} |
| Minimum cross-sectional area | 41 mm2 |
| Flow direction | Fluid must run from the intake port to the outlet ports. Please refer to the flow directions (arrows) on the "Models and Dimensions". |
| Drawing callouts for RE-PV-30 (mm) | 38, 16, (7), 14, (7), 28, ø6.5, 7, (58), (41), 50, 50, 39, (95), (24), 12, Hex.22(WAF), (206), 22, R 1/2 |
| Flow rate | Pressure - Flow Characteristics graph, test fluid air: flow rate in m3/min (ANR) against pressure in MPa {kgf/cm2}, with curves for 1) 3 pieces of 30PH, 2) 2 pieces of 30PH, 3) 1 piece of 30PH. Graph scale 0 to 6.0 m3/min (ANR) over 0 to 0.7 MPa {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. 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.
All technical data on this page is taken from the Nitto Kohki general catalogue Quick Connect Couplings C01en-b, page 54. The complete catalogue is available for download on this page.
