Airtac PEW T-Type Side Reducing Tee Fitting PEW6-4D
The AirTAC Airtac PEW T-Type Side Reducing Tee Fitting PEW6-4D is a genuine different diameter tee for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeDifferent diameter tee
- SeriesPEW
- 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 PEW T-Type Side Reducing Tee Fitting PEW6-4D
The PEW6-4D is an AirTAC different diameter union Y, a one-touch tube-to-tube fitting with no thread at all. It accepts Dia 6 soft nylon or polyurethane tube on the run leg and Dia 4 tube on the branch, splitting the flow into two diverging legs instead of a tee's square 90-degree branch. On this series the D suffix colours the whole body black, not just the release button as on PC and POC connectors, so the fitting reads as part of a dark machine housing rather than a grey add-on.
Both ends are true one-touch: push the tube in past the POM chuck and the stainless spring gasket grips it against the NBR O-ring; press the release ring and the tube slides free. As a resin-body part in PBT it runs the standard profile, not the metal one: 0-1.0 MPa working pressure, -750 mmHg vacuum capability, 1.5 MPa proof pressure and a -20 to +70 C window. Because there is no thread, nothing needs sealing - no sealant, no tape, no gasket.
Airtac PEW T-Type Side Reducing Tee Fitting PEW6-4D Technical Specifications
| Model | Airtac PEW T-Type Side Reducing Tee Fitting PEW6-4D |
|---|---|
| Type | Different diameter tee |
| Series | PEW |
| 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 PEW T-Type Side Reducing Tee Fitting PEW6-4D
| PEW | Different diameter tee. |
|---|---|
| 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 PEW T-Type Side Reducing Tee Fitting PEW6-4D Is Used
Miniature cylinder drop from a Dia 6 trunk
On a compact pick-and-place unit, take the Dia 6 supply trunk to the actuator and branch a Dia 4 leg off the Y to a small bore guide cylinder, keeping the tube routing low and clear of the gripper travel.
Suction cup feed on a vacuum bench
A Dia 4 branch line feeding a small suction cup or venturi ejector suits this fitting because the resin body is rated to -750 mmHg, so the Y can sit in the vacuum path without leaking down the hold time.
Splitting a valve manifold outlet
Where a solenoid valve outlet on a Dia 6 manifold drop must also serve a Dia 4 pilot or purge line, the black Y body tucks against dark panel work and the angled branch keeps both tube runs clear of the valve coil.
Is the Airtac PEW T-Type Side Reducing Tee Fitting PEW6-4D the Right Part?
Size both ends before you order, because a different diameter Y only works when the tube matches exactly - a Dia 4 branch will not hold 5/32 inch or any other near-miss tube. Dia 4 is the smallest tube OD AirTAC publishes in this family, so on the branch side there is nothing smaller to step down to. If your branch grows to Dia 6 you are on the same-diameter PE ladder instead, and if the run itself steps up to Dia 8 feeding a Dia 6 branch, that is the next rung of the PEW different diameter ladder. Where you want a straight inline reduction rather than a branch, the PG different diameter straight union is the shape to compare.
The Y geometry is the whole point here: use it where two downstream lines should leave the supply at an angle rather than stacking a 90-degree tee, for example when routing a branch around a guard or a cable loom. And note the -750 mmHg rating - this fitting holds vacuum, which matters if the small branch feeds a suction cup or an ejector.
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 PEW T-Type Side Reducing Tee Fitting PEW6-4D FAQ
It is an AirTAC different diameter union Y for Dia 6 tube on the run and Dia 4 tube on the branch, with no thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), negative pressure capability is -750 mmHg (10 Torr), proof pressure is 1.5 MPa and the temperature range is -20 to +70 C. Tubing is soft nylon or polyurethane, the body is PBT with a POM chuck and release button, a stainless spring gasket and an NBR O-ring, and the D suffix makes the body black.
No. Each leg of a different diameter union is sized for exactly one tube OD: Dia 6 on one leg, Dia 4 on the other, and the chucks are machined to match. Swapping the ends puts the Dia 4 chuck against a 6 mm tube it cannot seal, and forcing it damages the gasket. Check which leg is which before assembly, and if both lines are the same size, order a same-diameter PE union Y instead.
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