Airtac PYW Y-Type Reducing Tee Fitting PYW12-8
The AirTAC Airtac PYW Y-Type Reducing Tee Fitting PYW12-8 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.
- TypeDifferent diameter union Y
- SeriesPYW
- 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 PYW Y-Type Reducing Tee Fitting PYW12-8
The PYW12-8 is an AirTAC different diameter union Y, a tube-to-tube one-touch fitting that joins a Dia 12 mm main run to a Dia 8 mm branch in a single Y-shaped body. Push the soft nylon or polyurethane tube into each port until it bottoms out: the stainless spring gasket and chuck inside grip the tube wall and the NBR O-ring seals it. Press the release ring and the tube frees again, so rework on a machine does not mean cutting tubing.
This is the resin one-touch profile, not the metal BP line: working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum to -750 mmHg, proof pressure 1.5 MPa and a temperature window of -20 to +70 C. Because it unions tube directly to tube there is no threaded stud, so there is no thread sealant to apply and nothing to tighten - the angled Y legs do the splitting for you.
Airtac PYW Y-Type Reducing Tee Fitting PYW12-8 Technical Specifications
| Model | Airtac PYW Y-Type Reducing Tee Fitting PYW12-8 |
|---|---|
| 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.
Model Code: Airtac PYW Y-Type Reducing Tee Fitting PYW12-8
| 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. |
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 PYW Y-Type Reducing Tee Fitting PYW12-8 Is Used
Packaging carousel actuator feed
On a carton-wrapping carousel, run the Dia 12 supply from the FRL manifold and let the PYW12-8 Y off a Dia 8 leg to the rotary actuator, saving a separate reducer elbow.
Vacuum pick-and-place on a PCB handler
The -750 mmHg negative pressure rating lets this Y split a Dia 12 vacuum trunk into Dia 8 legs serving suction cups that lift PCB panels off a magazine.
Welding fixture clamp circuit
Split one Dia 12 feed from the valve manifold into two Dia 8 legs reaching the clamp cylinders on either side of a spot-welding fixture without adding threaded tees.
Is the Airtac PYW Y-Type Reducing Tee Fitting PYW12-8 the Right Part?
Step one size down and you get the PYW10-8, a Dia 10 to Dia 8 Y that reduces the branch drop instead of the main run; Dia 12 is the largest tube in this catalogue, so there is no larger PYW - you are at the top of the ladder. If both runs are the same size, use the plain PY union Y rather than this reducing version, and remember a Dia 8 port will not hold 1/4 in tube: tube OD must match the fitting exactly.
Match the split to the load: the Dia 12 leg carries the full supply, while the two Dia 8 legs suit smaller actuators or sensor airlines. Keep runs away from heat above 70 C and respect the 1.5 MPa proof figure if your circuit spikes.
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 PYW Y-Type Reducing Tee Fitting PYW12-8 FAQ
It is an AirTAC different diameter union Y for a Dia 12 mm main tube and Dia 8 mm branches, tube-to-tube with no thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa and temperature -20 to +70 C. It takes soft nylon or polyurethane tubing, gripped by a stainless spring gasket and POM chuck with an NBR O-ring, in a PBT body.
No. This version is built for unequal diameters, 12 mm into 8 mm. If both tube runs are the same OD, order the plain PY union Y of that size instead - and in every case the tube OD must match the port exactly, as a 12 mm port will not grip 10 mm tube.
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