Airtac PYW Y-Type Reducing Tee Fitting PYW6-4
The AirTAC Airtac PYW Y-Type Reducing Tee Fitting PYW6-4 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 PYW6-4
The PYW6-4 is AirTAC's different diameter union Y, a tube-to-tube one-touch fitting that combines Dia 6 mm and Dia 4 mm soft nylon or polyurethane tubing in a single Y-shaped body. Push each tube home until it bottoms and the internal chuck grips the OD; press the release ring to free it. There is no threaded port anywhere on this part, so it lives entirely inside the tubing run.
It runs on the resin one-touch spec profile: working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum down to -750 mmHg (10 Torr), proof pressure 1.5 MPa and a temperature window of -20 to +70 C. The body is PBT with a POM release button and chuck, an aluminium-alloy guide, a stainless spring gasket and an NBR O-ring. Standard finish is grey; add a D suffix to the ordering code if you need the black body version.
Airtac PYW Y-Type Reducing Tee Fitting PYW6-4 Technical Specifications
| Model | Airtac PYW Y-Type Reducing Tee Fitting PYW6-4 |
|---|---|
| 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 PYW6-4
| 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 PYW6-4 Is Used
Analytical sampler air purge
On a lab autosampler, one Dia 6 drop from the plant air header can feed two Dia 4 purge jets over the optics bench, keeping the Y hidden behind the instrument shroud.
Twin small cylinders on a pick head
A pick-and-place head with two Dia 4 mm bore mini cylinders can be fed from a single Dia 6 supply riser through this Y, halving the tubing count down the mast.
Conveyor edge-guide air jets
Bottling lines often run Dia 6 trunk lines along the frame and need paired Dia 4 air-knife jets at each guide arm; a reducing Y makes the split at the arm without extra adapters.
Is the Airtac PYW Y-Type Reducing Tee Fitting PYW6-4 the Right Part?
Dia 4 mm is the smallest standard tube this catalogue serves, so PYW6-4 sits at the bottom edge of the reducing-Y ladder - there is nothing smaller below it, and stepping up means moving to a Dia 8 to Dia 6 Y. Every step up in bore costs panel space but gains volume per stroke, so size the Y to the smallest branch your actuator actually needs rather than the supply header. Note that the same Dia 6 to Dia 4 reduction is also available as a straight PG reducer or as a PEG / PEW tee; pick the Y only when you genuinely need a two-way split.
Tube OD must match the port exactly: the chuck in the Dia 4 leg will not seal on 4.5 mm or 1/4 inch tube, and the Dia 6 leg will not hold 6.35 mm. If your Dia 6 line is actually 1/4 inch (6.35 mm) English tubing, stop and re-check before ordering.
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 PYW6-4 FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, operating temperature -20 to +70 C. The part is a different diameter union Y joining Dia 6 mm and Dia 4 mm tube, with no thread - all three ports are push-in tube ports for soft nylon or polyurethane tubing.
Read the code as a pair: PYW6-4 joins Dia 6 and Dia 4 tubing, with the Dia 6 leg on one side and the Dia 4 side of the Y split from it. Each port accepts only the exact OD printed for it, so keep Dia 6 tube out of the Dia 4 legs. To release, press the coloured ring squarely toward the body before pulling the tube - pulling at an angle mars the tube and weeps under vacuum.
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