Airtac PY Y-Type Tee Connector PY4D
The AirTAC Airtac PY Y-Type Tee Connector PY4D is a genuine union y for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeUnion Y
- SeriesPY
- 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 PY Y-Type Tee Connector PY4D
The PY4D is an AirTAC PY union Y, a tube-to-tube one-touch fitting that joins three Dia 4 mm soft nylon or polyurethane lines in a Y shape: one common leg feeding two branch legs at a split angle. All three ends work the same way. Push the tube in until it bottoms and the stainless spring gasket chuck grips it; press the release ring to free it. The D suffix means the body is moulded in black rather than the standard grey, so the fitting blends into dark machine framing and hides grime on visible lines.
This is the resin/brass profile, not the metal BP line: working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, temperature -20 to +70 C. The body is PBT with a POM release button and chuck, aluminium-alloy guide, stainless spring gasket and NBR O-ring. Being a pure union, it has no threaded port at all, so it never sees a torque wrench and needs no sealant.
Airtac PY Y-Type Tee Connector PY4D Technical Specifications
| Model | Airtac PY Y-Type Tee Connector PY4D |
|---|---|
| Type | Union Y |
| Series | PY |
| 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 PY Y-Type Tee Connector PY4D
| PY | 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 PY Y-Type Tee Connector PY4D Is Used
Split feed to two lab sensors
On analytical and test instruments with 4 mm polyurethane sample or purge lines, the PY4D divides one supply into two equal branches without a manifold block, and the black body stays unobtrusive on white instrument panels.
Bundle routing inside a drag chain
Where a 4 mm tube exits a moving cable chain and must feed both a gripper and a vacuum ejector line, the Y shape angles the two runs apart gently instead of kinking them back at a right angle.
Two-head pick-and-place nozzle supply
Small pick-and-place heads running 4 mm nylon lines from a single vacuum generator feed can share one supply leg through this union Y, keeping both nozzle lines the same bore so neither head starves the other.
Is the Airtac PY Y-Type Tee Connector PY4D the Right Part?
Dia 4 is the smallest tube this Y union is made in, so there is no step down; the single neighbour is the PY6, which moves you from instrument-grade 4 mm lines up to the 6 mm size most small cylinders and valves are plumbed in. Stepping up doubles the bore area roughly, so if your actuator speed is marginal, the 6 mm branch is often the fix. Whatever you pick, the tube OD must match the fitting exactly: a 1/4 in (6.35 mm) tube will click into a Dia 4 chuck but will not seal and will blow off under pressure.
Use a PY over a PE tee when you want the two branches to leave at a Y angle instead of a hard 90 degree split, which is easier on the tube in tight runs. If one branch needs a smaller tube, that is a job for a different-diameter fitting such as PYW, not this equal-leg part.
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 PY Y-Type Tee Connector PY4D FAQ
The PY4D is a black equal union Y for Dia 4 mm soft nylon or polyurethane tube on all three legs, with no threaded port. Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa, operating temperature -20 to +70 C. Body PBT in black (D suffix), release button and chuck POM, aluminium-alloy guide, stainless spring gasket, NBR O-ring.
No. All three legs of the PY4D grip Dia 4 mm tube only, and the OD must match exactly. To step a Y branch down to a smaller line, use AirTAC's different-diameter PYW series instead; to reduce a straight run, look at the PG range. Also note the 4 mm size is the smallest union Y made here, so the only neighbouring SKU is the PY6 for 6 mm tube.
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