
The AirTAC Airtac PYW Y-Type Reducing Tee Fitting PYW12-10 is a genuine different diameter union y for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
The AirTAC PYW12-10 is a different diameter union Y from the resin one-touch range. It is a tube-to-tube part with no thread at all: the single Dia 12 mm leg takes the larger supply line, and the two Dia 10 mm legs split that flow into two smaller branches at a Y angle. Push each tube home and the internal chuck grips it; press the release ring and the tube frees off again.
This is the standard resin spec, not the metal BP line: working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, and a working temperature of -20 to +70 C. It also holds vacuum down to -750 mmHg (10 Torr), so it can serve suction circuits, not just pressure. Body POM chuck, stainless spring gasket and NBR O-ring come standard in grey; the D suffix changes the body to black.
| Model | Airtac PYW Y-Type Reducing Tee Fitting PYW12-10 |
|---|---|
| Type | Different diameter union Y |
| Series | PYW |
| 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.
| PYW | Different diameter union Y. |
|---|---|
| 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. |
A 12 mm drop from the FRL regulator steps through the PYW12-10 into two 10 mm legs feeding the index cylinder and its end-of-stroke sensor line, all push-in with no thread sealing needed.
One 12 mm branch trunk is Y-split into a pair of 10 mm runs driving two reject-blowoff nozzles above the conveyor, balancing flow without a second tee and reducer.
On a semiconductor tray-handling pick head, the PYW12-10 carries a -750 mmHg vacuum from a 12 mm line and feeds two 10 mm suction cup stems from one connection.
Step down from this part and you reach PYW10-8, which drops Dia 10 to Dia 8 - a smaller, cheaper jump that suits lighter sub-branches. Step up and there is nothing: Dia 12 to Dia 10 is the largest different-diameter pair in the PYW ladder, so if you need to feed 12 mm legs you are already at the top of the range. If your two legs are the same size as the trunk, skip the reducer and use the equal-diameter PY union Y instead. Remember the grip is exact: the Dia 10 end will not hold 3/8 in or any other near-miss tubing, only true Dia 10 mm soft nylon or polyurethane.
Quick checklist
It joins Dia 12 mm tube to Dia 10 mm tube in a Y shape, with no threaded port. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, negative pressure -750 mmHg (10 Torr), and working temperature -20 to +70 C. It is rated for soft nylon or polyurethane tube only, and suits vacuum as well as pressure circuits.
The chuck grips one exact outside diameter, so the 10 mm leg accepts only true 10 mm OD soft nylon or polyurethane tube - a worn, scored or slightly oversized tube will leak past the NBR O-ring even though it feels close. Cut the tube square, deburr it, and push it in until it bottoms; if the bore is scratched or oval, replace the tube rather than forcing a seal.
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