Airtac PG Reducing Union PG8-6
The AirTAC Airtac PG Reducing Union PG8-6 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 PG8-6
The AirTAC PG8-6 is a PG different diameter straight union, an inline tube-to-tube reducer that joins a Dia 8 mm outside diameter line to a Dia 6 mm line in a single push-fit body with no thread involved. Each end works as a one-touch connection: push the tube home and an internal chuck grips the outside diameter to seal, then press the release ring toward the body while pushing the tube in again to free it.
This is AirTAC's resin one-touch profile, not the metal BP line: working pressure 0 to 1.0 MPa (0 to 10 kgf/cm2), proof pressure 1.5 MPa, negative pressure -750 mmHg (10 Torr), and a service range of -20 to +70 C on soft nylon or polyurethane tubing. The body is grey as standard with a D suffix for black, and inside sits a POM release button and chuck, an aluminium-alloy guide, a stainless spring gasket and an NBR O-ring. Because the reduction is built into the body itself, each chuck only accepts its own size - Dia 6 tube will not seal in the Dia 8 end, and vice versa.
Airtac PG Reducing Union PG8-6 Technical Specifications
| Model | Airtac PG Reducing Union PG8-6 |
|---|---|
| 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 PG8-6
| 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 PG8-6 Is Used
Conveyor air rail on a carton sealer
Run a Dia 8 trunk along the frame of a packaging line's carton sealer and let PG8-6 step each Dia 6 drop down to the gripper or flap cylinder without stacking separate adapters.
Pick-and-place head feed
Supply the Dia 6 rotary actuator on a small CNC pick-and-place head from a Dia 8 manifold branch; the straight inline reducer keeps the routing axial where head space is tight.
Lab sample-handler vacuum drop
Step a Dia 8 vacuum header down to Dia 6 tubing feeding a compact suction cup ejector on a sample-handling station, comfortably inside the -750 mmHg vacuum rating.
Is the Airtac PG Reducing Union PG8-6 the Right Part?
Step down from this part and the same Dia 8 body takes a Dia 4 small side as PG8-4, the right call when a thin drop line feeds a low-consumption jet or pilot; step up and PG10-6 keeps the Dia 6 branch but hangs it on a Dia 10 trunk, so one larger feed can supply several Dia 6 drops. If the port itself is threaded, a PC male connector or a PKD reducer branch belongs there instead - the PG union has nothing to screw in.
Whichever size you land on, match each tube outside diameter exactly. A 1/4 in (6.35 mm) tube measures close to Dia 6 but is not close enough for the chuck to seal, and a soft Dia 6 line pushed into the Dia 8 end will simply blow off under pressure.
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 PG8-6 FAQ
Working pressure 0 to 1.0 MPa (0 to 10 kgf/cm2), negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and a temperature range of -20 to +70 C. It is a threadless reducer union for Dia 8 mm to Dia 6 mm soft nylon or polyurethane tubing, with a grey body as standard.
No. The reduction is built into the body, so each chuck accepts only its own outside diameter, and 1/4 in (6.35 mm) tube is not a substitute for Dia 6 either. Cut the tube square and push it fully home; if you need the same Dia 8 line to feed an even smaller drop, PG8-4 does that on the identical Dia 8 body.
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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.
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