Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D
The AirTAC Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D is a genuine plug-in reducer for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypePlug-in reducer
- SeriesPGJ
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- Temperature-20 to +70 °C
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D
The AirTAC PGJ8-4D is a plug-in reducer, a tube-to-tube union that steps a Dia 8 mm air line down to a Dia 4 mm line with no threaded port in between. Both ends are one-touch: push the tube home and the internal chuck grips it; press the release ring and it slides free. The hyphenated code carries both sizes, so 8-4 means an 8 mm inlet collet and a 4 mm outlet collet in one body.
This is a resin line part, not the metal BPC family: working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum to -750 mmHg, proof pressure 1.5 MPa, temperature -20 to +70 C, for soft nylon or polyurethane tube. The D suffix on PGJ changes the whole body to black, unlike on PC and POC where it recolours only the release button. PBT body, POM chuck, NBR seal, shipped assembled.
Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D Technical Specifications
| Model | Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D |
|---|---|
| Type | Plug-in reducer |
| Series | PGJ |
| Connection | Push-in one-touch |
| Working pressure | 0 - 1.0 MPa (0 - 10 kgf/cm2) |
|---|---|
| Negative pressure | -750 mmHg (10 Torr) |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Applicable tubing | Soft nylon or polyurethane tube |
| Thread standard | PT (Rc tapered) unless the code says otherwise |
POM release button and chuck, aluminium-alloy guide, stainless spring gasket, NBR O-ring; body brass or PBT depending on the part. AirTAC publishes flow as a characteristic curve rather than a single figure, so no L/min value is listed.
Model Code: Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D
| PGJ | Plug-in reducer. |
|---|---|
| 4 / 6 / 8 / 10 / 12 | Tube outside diameter in mm (3.2 mm exists on the mini series). |
| M5 / 01 / 02 / 03 / 04 | Thread: M5x0.8, 1/8", 1/4", 3/8", 1/2" (M3 on the mini series). |
| D | Black. Blank = grey. |
Fitting & Sealing Notes
- check Cut the tube square and clean before pushing it home, or the seal will leak.
- check Push until it stops, then pull back to check the chuck has gripped.
- check To release, press the collet ring fully in and pull the tube out.
- check Threaded parts arrive with sealant on the thread; M5 sizes use a sealing gasket.
- check Match the tube OD exactly - a 6 mm fitting will not hold 1/4" tube.
Where the Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D Is Used
Coating-line air jets
On a PCB conformal coating head, a Dia 8 distribution run is stepped down to a Dia 4 line feeding a fine air-knife or jet nozzle, keeping the small-bore section short and responsive.
Vacuum pick-and-place
A packaging machine suction station drops from a Dia 8 vacuum header to Dia 4 cup lines; the -750 mmHg rating of this resin union covers the vacuum side of the circuit as well as pressure.
Black cabinet retrofits
Inside a control enclosure fitted with black wiring duct and black tubing, the all-black D-version body blends in where a grey fitting would stand out on every drop point.
Is the Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D the Right Part?
Below this SKU sits PGJ6-4 (6 mm down to 4 mm) and above it PGJ10-6 (10 mm down to 6 mm); a bigger step means a larger upstream bore and more air volume reaching the small line. If you only need a one-size drop from a Dia 8 run, PGJ8-6 keeps the change gentler than jumping straight to 4 mm. Match the drop to what the downstream device actually consumes - a Dia 4 line feeding a small nozzle does not need a Dia 8 tail long after the reducer.
Tube OD must match the collet exactly on both ends. The Dia 8 side will not grip 5/16 in imperial tube, which measures 7.94 mm and looks close enough to fool you at the bench.
Quick checklist
- ✓ Tube outside diameter matches exactly
- ✓ Thread size and standard match the port
- ✓ Working pressure within 0 - 1.0 MPa (0 - 10 kgf/cm2)
- ✓ Temperature within -20 to +70 °C
Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa, operating temperature -20 to +70 C. It is a tube-to-tube plug-in reducer joining Dia 8 mm tube to Dia 4 mm tube with no thread, for soft nylon or polyurethane tubing, in the black D finish.
The collets are size-exact: only 8 mm OD tube fits the large end and only 4 mm OD fits the small end. Soft nylon and polyurethane are the approved materials, and any brand of tube with those ODs and wall stiffness will seat, but a 5/16 in (7.94 mm) imperial tube will not seal in the Dia 8 end even though it looks almost right.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard parts are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC One-Touch Fittings
Request a Quote for Airtac PGJ Plug Pin Reducing Straight Connector PGJ8-4D
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.