Airtac PYW Y-Type Reducing Tee Fitting PYW6-4D
The AirTAC Airtac PYW Y-Type Reducing Tee Fitting PYW6-4D 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 PYW6-4D
The PYW6-4D is AirTAC's different diameter union Y, a three-way tube-to-tube fitting that takes a single Dia 6 mm run and splits it into two Dia 4 mm branch lines. There is no threaded port on this part at all, so it sits entirely inside the tubing circuit. The D suffix means the whole body is moulded in black, not just the release button, which matters where a dark fitting looks better against black machine housings or dark braided tubing.
This belongs to the resin one-touch family: working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, vacuum down to -750 mmHg (10 Torr) and a temperature window of -20 to +70 C. Push each tube fully home and the internal chuck set grips the OD; press the POM release ring squarely toward the body and the tube frees. The body is PBT with a stainless spring gasket and NBR O-ring seals, and soft nylon or polyurethane tubing is the correct media.
Airtac PYW Y-Type Reducing Tee Fitting PYW6-4D Technical Specifications
| Model | Airtac PYW Y-Type Reducing Tee Fitting PYW6-4D |
|---|---|
| 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 PYW6-4D
| 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 PYW6-4D Is Used
Pick-and-place gripper air split
On a compact pneumatic gripper head, one 6 mm feed from the valve manifold splits through the PYW6-4D into two 4 mm lines serving the open and close ports, keeping hose clutter inside the gantry to a minimum.
Vacuum cup dual-line feed on a carton former
A single 6 mm vacuum line from the ejector splits into two 4 mm drops feeding suction cups on either side of a carton-forming head, and the -750 mmHg vacuum rating of the resin line covers the circuit.
Sensor and pilot branch on a bottling line
A 6 mm supply routed along a filling machine frame branches into 4 mm pilot lines for a reed-switch air signal and a small air jet, all pushed together in seconds with no threaded joints.
Is the Airtac PYW Y-Type Reducing Tee Fitting PYW6-4D the Right Part?
This reducer Y steps down from 6 mm to 4 mm, so the bore of each branch is one third narrower in area than the supply. That is fine for feeding small actuators, sensors or pilot lines, but if both branches carry a full-size load you are better off with the equal-bore PY6 union Y and stepping down later with PG6-4 straight reducers. For an all-straight reduction with no split, the PG6-4 different diameter union is the simpler part.
Tube OD must match exactly on every leg: the Dia 6 leg will not grip 1/4 inch (6.35 mm) tube despite being close in size, and the Dia 4 legs take only true 4 mm tubing. Cut the tube square and deburr it, because a ragged cut is the most common cause of a leak at the O-ring seat on any push-in fitting.
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 PYW6-4D FAQ
It is a different diameter union Y joining Dia 6 mm tube to two Dia 4 mm legs, with no thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, negative pressure -750 mmHg (10 Torr) and operating temperature -20 to +70 C. It accepts soft nylon or polyurethane tubing and the body is black as standard on the D variant.
Yes, that is exactly what this part does: the single larger leg takes 6 mm tubing and both angled legs take 4 mm tubing, each gripped by its own chuck set. To release any leg, push the tube in first to relax the grip, press the release ring squarely against the body, then withdraw the tube. Pulling without pressing the ring damages the tube surface and the seal.
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