Airtac PGJ Plug Pin Reducing Straight Connector PGJ12-8
The AirTAC Airtac PGJ Plug Pin Reducing Straight Connector PGJ12-8 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 PGJ12-8
The PGJ12-8 is an AirTAC PGJ plug-in reducer, a straight tube-to-tube union that changes diameter in line: Dia 12 soft nylon or polyurethane tube pushes into one end, Dia 8 tube into the other, and both lock instantly. There is no thread anywhere on this part - the whole reduction happens inside the body, so a large-bore feed can shrink to a smaller run without adding an elbow or a threaded fitting.
Each end carries its own POM chuck and stainless spring gasket sized to its own tube, so the Dia 12 side grips only Dia 12 and the Dia 8 side only Dia 8. This is the resin one-touch profile: working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum down to -750 mmHg (10 Torr), proof pressure 1.5 MPa and a service window of -20 to +70 C. The body is PBT with NBR O-ring seals, and the grey body can be ordered in black by adding a D suffix to the code.
Airtac PGJ Plug Pin Reducing Straight Connector PGJ12-8 Technical Specifications
| Model | Airtac PGJ Plug Pin Reducing Straight Connector PGJ12-8 |
|---|---|
| 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 PGJ12-8
| 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 PGJ12-8 Is Used
Pallet conveyor air drop
On a pallet conveyor loop, the Dia 12 end takes the main drop from the overhead air header while the Dia 8 end feeds the stopper and lifter cylinders along the frame, all in one straight in-line joint.
Bottling line filler feed
A wash-down bottling machine runs Dia 12 trunk lines between filler heads; the PGJ12-8 steps each trunk down to Dia 8 right where the neck-gripper actuator needs a lighter, cheaper hose.
CNC indexing table retrofit
Retrofitting an indexing table on a CNC cell, the original Dia 12 nylon run is kept and the Dia 8 end connects to a replacement clamp cylinder, avoiding a full rewiring of the machine base.
Is the Airtac PGJ Plug Pin Reducing Straight Connector PGJ12-8 the Right Part?
Sizing both ways: one step down on the small end, a Dia 10 to Dia 8 pairing suits 10 mm cylinder feed lines heading into a narrower 8 mm run. On the large end there is no step up at all - Dia 12 is the widest soft tube this catalogue carries, so PGJ12-8 already sits at the top of the ladder. Flow capacity follows the bore: the Dia 8 exit is the real throttle, so size downstream actuators on the 8 mm section, not the 12 mm feed.
Because this union has no thread, match the pressure port elsewhere: a PC male connector or a PKD male reducer triple branch handles the threaded side of the circuit. If the line has to pass through a cabinet wall instead of running along it, a PM bulkhead union or PLM bulkhead male elbow is the correct shape, not this straight reducer. And always match tube OD exactly - Dia 12 tube will not seat in the Dia 8 end, and 1/4 inch imperial tube will not seal in either.
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 PGJ12-8 FAQ
It is a plug-in reducer joining Dia 12 tube to Dia 8 tube with no thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it holds vacuum to -750 mmHg (10 Torr), proof pressure is 1.5 MPa, and the service temperature range is -20 to +70 C. It accepts soft nylon or polyurethane tube on both ends and uses the resin one-touch construction: PBT body, POM chucks, NBR seals.
No. Each end has its own chuck and gasket matched to one exact tube OD, so the Dia 12 end grips only Dia 12 tube and the Dia 8 end only Dia 8 tube. A mismatched tube will not seal and will blow out under pressure. If your circuit needs the same diameter both sides, order a straight PU union in one size instead of this reducer.
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