Airtac PGJ Plug Pin Reducing Straight Connector PGJ6-4
The AirTAC Airtac PGJ Plug Pin Reducing Straight Connector PGJ6-4 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 PGJ6-4
The PGJ6-4 is an AirTAC different-diameter straight union from the PGJ range: a tube-to-tube reducer with no external thread at all. It joins a Dia 6 mm line on one side to a Dia 4 mm line on the other, in a single straight body, so a branch that drops from 6 mm distribution tubing down to 4 mm actuator or sensor tubing needs exactly one part instead of a union plus adapter.
Connection works the usual one-touch way on both ends: push the tube in until it bottoms, the stainless spring gasket and POM chuck close around the OD and hold it under pressure, and pressing the release ring lets it slide free. This is the resin spec profile, not the metal line: 0-1.0 MPa working, 1.5 MPa proof, -750 mmHg vacuum and -20 to +70 C, for soft nylon or polyurethane tube. Body is PBT with an NBR seal.
Airtac PGJ Plug Pin Reducing Straight Connector PGJ6-4 Technical Specifications
| Model | Airtac PGJ Plug Pin Reducing Straight Connector PGJ6-4 |
|---|---|
| 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 PGJ6-4
| 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 PGJ6-4 Is Used
Valve manifold branch stepping down
On a valve manifold with 6 mm push-in outlets, PGJ6-4 takes each branch straight down to 4 mm tubing feeding a small pilot-operated valve or cylinder, one part instead of a union plus reducing adapter.
Compact gripper feed on a pick-and-place head
A pneumatic gripper or small rotary actuator on a pick-and-place head rarely needs more than a 4 mm line; run 6 mm down the machine and let PGJ6-4 make the final reduction at the head, keeping the fitting short and straight in the moving assembly.
Instrument and sensor air lines in a lab skid
Analyser skids and bench-top process rigs often mix 6 mm distribution tube with 4 mm tubing into sensors, purge ports and sample blocks; PGJ6-4 bridges the two sizes cleanly without adding a threaded joint into a compact panel.
Is the Airtac PGJ Plug Pin Reducing Straight Connector PGJ6-4 the Right Part?
PGJ6-4 sits at the bottom of the PGJ reducer ladder. There is no smaller step below it, because Dia 4 mm is the smallest tube size this catalogue makes, so if your small side is 4 mm this is the entry point; the next step up is PGJ8-6, which drops an 8 mm main run to 6 mm instead. Choosing where to step down decides where your flow rate becomes limited by the small bore, so put the reducer as close to the low-consumption device as practical.
Check both tube walls: the 6 mm end only accepts 6 mm OD tube and the 4 mm end only 4 mm OD tube. A 1/4 in or 5 mm tube will not seal in either side. Because this part has no thread, no thread sealant is involved anywhere - both joints are O-ring sealed on the tube OD.
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 PGJ6-4 FAQ
PGJ6-4 is an AirTAC PGJ plug-in reducer straight union joining Dia 6 mm tube to Dia 4 mm tube, with no external thread. 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. It takes soft nylon or polyurethane tube on both sides and is part of the resin/brass one-touch series with a POM chuck, aluminium-alloy guide, stainless spring gasket and NBR O-ring.
No to the first, and yes to the second with care. Each side only grips its own exact OD, so the Dia 6 side takes 6 mm tube and the Dia 4 side takes 4 mm tube only. The part is symmetric in function, so air can flow either direction through the reducer; just remember the flow capacity of the circuit is set by the smaller 4 mm bore once the tube is connected.
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