Airtac PYW Y-Type Reducing Tee Fitting PYW8-6
The AirTAC Airtac PYW Y-Type Reducing Tee Fitting PYW8-6 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 PYW8-6
The PYW8-6 is an AirTAC different diameter union Y, a three-way push-to-connect fitting with no thread at all: its purpose is to split one 8 mm tube line into two 6 mm tube legs, or to merge two smaller 6 mm returns back into a single 8 mm run. Push the tube into each port and the internal chuck grips the OD; press the release ring toward the body and the tube frees. Because the inlet side is one size larger than the two branch sides, it does a job a plain PY union Y of one single size cannot.
This is a resin-line part, so the correct profile is 0-1.0 MPa (0-10 kgf/cm2) working pressure, -750 mmHg (10 Torr) vacuum, 1.5 MPa proof pressure and -20 to +70 C. The body ships in grey; the D suffix version changes it to black. It suits soft nylon or polyurethane tube only, and at no point does it need thread sealant since there is no metal thread to seal.
Airtac PYW Y-Type Reducing Tee Fitting PYW8-6 Technical Specifications
| Model | Airtac PYW Y-Type Reducing Tee Fitting PYW8-6 |
|---|---|
| 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 PYW8-6
| 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 PYW8-6 Is Used
Vacuum pick-and-place circuit
An 8 mm vacuum header from the ejector can drop into two 6 mm legs feeding suction cups, with the -750 mmHg (10 Torr) rating of this Y covering the vacuum side of the circuit.
Packaging machine branch drop
On a cartoning or wrapping line, a single 8 mm drop from the valve manifold can split through the PYW8-6 into two 6 mm feeds for small seal-bar or clamshell cylinders.
Robot end-of-arm air splitting
On a pick arm that carries both a gripper and a blow-off nozzle, one 8 mm supply line up the arm can branch into two 6 mm circuits without any threaded block.
Is the Airtac PYW Y-Type Reducing Tee Fitting PYW8-6 the Right Part?
Step down and the catalogue offers the PYW6-4, which takes a 6 mm feed into two 4 mm legs - the pairing for very small pilot or sensor lines. Step up and the PYW10-8 accepts a 10 mm header feeding two 8 mm branches. Where this 8-6 sits in the middle, it is the natural bridge from a standard 8 mm cylinder feed down to 6 mm tubing that many compact valves and actuators accept. If you need equal sizes on all three legs, order the single-diameter PY union instead.
Match the tube, not the nominal pipe: every port is sized to one exact OD, so a 6 mm leg will not hold 1/4 in (6.35 mm) hose and an 8 mm stem will not grip 5/16 in. Nominal conversions are the most common cause of slow leaks on union fittings.
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 PYW8-6 FAQ
It is a different diameter union Y joining Dia 8 tube on the single stem to Dia 6 tube on both branch legs. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), vacuum capability is -750 mmHg (10 Torr), proof pressure is 1.5 MPa and the temperature range is -20 to +70 C. It is the resin one-touch profile and takes soft nylon or polyurethane tube.
No. The stem port is machined for 8 mm OD tube and the two branch ports for 6 mm OD tube, and each chuck only grips its own exact size. If all three legs must be 6 mm, use the single-diameter PY union Y; if you want a smaller step such as 6 to 4 mm, the PYW6-4 is the catalogue answer.
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