Airtac PG Reducing Union PG10-8
The AirTAC Airtac PG Reducing Union PG10-8 is a genuine different diameter straight for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeDifferent diameter straight
- SeriesPG
- 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 PG Reducing Union PG10-8
The PG10-8 is an AirTAC PG different diameter straight union, a tube-to-tube reducer in the one-touch resin and brass family. It joins a Dia 10 mm tube on one side to a Dia 8 mm tube on the other in a straight line, with no threaded port involved. Push each tube home and the internal chuck grips the outer wall; press the POM release ring toward the body and the tube frees off again.
This is the standard resin profile, not the metal BPC line: working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, vacuum down to -750 mmHg (10 Torr), and a temperature window of -20 to +70 C. It is rated for soft nylon or polyurethane tubing, and the -750 mmHg vacuum figure means it also holds on vacuum pick-and-place circuits, not just positive pressure lines.
Airtac PG Reducing Union PG10-8 Technical Specifications
| Model | Airtac PG Reducing Union PG10-8 |
|---|---|
| Type | Different diameter straight |
| Series | PG |
| 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 PG Reducing Union PG10-8
| PG | Different diameter straight. |
|---|---|
| 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 PG Reducing Union PG10-8 Is Used
Packaging machine drop to compact cylinder
On a cartoning or flow-wrap machine, the Dia 10 header run supplies the air drop, and the PG10-8 reduces straight down to Dia 8 tubing feeding a compact guide cylinder. The push-in action means the changeover takes seconds during a line rebuild.
Robot end-effector air feed reduction
A six-axis robot arm routed with Dia 10 supply tubing can step down to lighter, more flexible Dia 8 hose at the wrist for a pneumatic gripper. The straight union keeps the joint slim inside the dress pack, and the release ring allows quick tooling swaps.
Vacuum conveyor branch on a pick-and-place line
Vacuum conveyors for plastic granulate or small parts run branches at different bores. This union bridges a Dia 10 vacuum line to a Dia 8 branch while holding -750 mmHg, and its POM release ring lets maintenance re-route a branch without draining the whole circuit.
Is the Airtac PG Reducing Union PG10-8 the Right Part?
Step down to PG8-6 when the branch shrinks again toward a small actuator, and step up to PG12-10 for the main header run where volume matters most. What changes is the bore: the Dia 8 side flows less than the Dia 10 side, so keep the larger diameter on the supply leg and reduce toward the consumer, never the other way round.
Match tube OD exactly on each end. The Dia 10 chuck will not seal on 3/8 in (9.5 mm) tubing and the Dia 8 side will not accept 5/16 in tube. If the line must turn a corner while reducing, a PV union elbow or a PEG different diameter tee is the shape to look at instead of this straight union. Note the hyphen in the code: reducers are the one family where AirTAC writes both sizes, so PG10-8 reads Dia 10 to Dia 8.
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 PG Reducing Union PG10-8 FAQ
It is a Dia 10 mm to Dia 8 mm reducing straight union in the AirTAC resin/brass one-touch range. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), proof pressure is 1.5 MPa, vacuum rating is -750 mmHg (10 Torr) and the temperature range is -20 to +70 C. It accepts soft nylon or polyurethane tubing only, one Dia 10 end and one Dia 8 end.
No. PG is a straight, in-line reducer, so both tubes enter on the same axis. For a 90 degree reducing joint use the PV union elbow; for a reducing branch or tee use the PEG or PEW different diameter tee. If you need to pass the joint through a panel, the PM bulkhead union is the correct shape, though it is not a reducer.
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