
The AirTAC Airtac PEG T-Type Concentric Reducing Tee Fitting PEG6-4 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.
The PEG6-4 is an AirTAC different diameter tee, a tube-to-tube reducing union that takes a Dia 6 mm main line and splits it into two legs, one of which accepts Dia 4 mm tubing. The reduction is moulded into one PBT body, so instead of buying a separate straight reducer plus an equal tee and stacking two joints, you make the whole branch take-off in a single fitting with one fewer leak path.
Connection is standard one-touch: push each tube firmly into its port until it bottoms out, and the internal chuck grips the OD to hold it under pressure; press the release ring to free it. This belongs to the resin/brass one-touch profile, which runs 0-1.0 MPa working pressure, -750 mmHg (10 Torr) vacuum, 1.5 MPa proof pressure and -20 to +70 C with soft nylon or polyurethane tubing. Grey body as standard; because this is a union with no threaded port, it arrives without thread sealant - that coating is reserved for the threaded series.
| Model | Airtac PEG T-Type Concentric Reducing Tee Fitting PEG6-4 |
|---|---|
| Type | Different diameter tee |
| Series | PEG |
| 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.
| PEG | 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. |
On a laboratory sample handler, a Dia 6 nylon trunk runs along the frame and the PEG6-4 drops a Dia 4 branch to a small ejector holding a vacuum cup - the -750 mmHg rating carries through the reduced leg.
A compact gripper on a PCB pick-and-place head only needs Dia 4 tubing; tapping the Dia 6 supply at the base of the arm with this tee keeps the run down the moving axis thin and light.
On a carton labeller, the Dia 6 main air line runs under the conveyor and this tee steps it down to a Dia 4 line feeding the small air jet that settles the label before the brush.
PEG6-4 sits at the bottom of the reducing-tee ladder: there is no smaller different-diameter step in this range, so Dia 6 to Dia 4 is as low as it goes. Stepping up, the next real part is PEG8-6, which carries a Dia 8 main line down to a Dia 6 branch - useful when the branch itself still has to feed a second sub-branch. If all three legs must be the same diameter, choose a plain equal union tee instead of a reducer.
Match tube sizes exactly: the Dia 6 port will not seal on 1/4 in (6.35 mm) tube, and the Dia 4 port will not take 5/32 in. Where the branch has to reach a threaded port rather than continue in tube, a PED male run tee with its own thread is the better shape.
Quick checklist
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and an operating temperature of -20 to +70 C with soft nylon or polyurethane tubing. This SKU joins Dia 6 mm tubing on the two through legs to Dia 4 mm tubing on the reduced branch, all in one push-fit body with no thread.
No. The PEG6-4 is a tube-to-tube union with no threaded port, so there is nothing to seal with tape or paste and nothing to torque - AirTAC publishes no tightening figure for it because none is needed. Push each tube in until it stops, confirm the chuck has gripped, and the joint is made. To remove a line, press the release ring on that port and pull the tube out.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard parts are processed and dispatched in 3-5 business days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.