Airtac PKG Reducing Five-Way Fitting PKG6-4D
The AirTAC Airtac PKG Reducing Five-Way Fitting PKG6-4D is a genuine reducer triple branch union for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeReducer triple branch union
- SeriesPKG
- 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 PKG Reducing Five-Way Fitting PKG6-4D
The PKG6-4D is an AirTAC PKG reducer triple branch union: a tube-to-tube one-touch fitting that continues a Dia 6 mm main run and splits off a reduced Dia 4 mm branch. It carries no thread at all, so unlike most parts in this catalogue (which are threaded PT), it lives entirely in the tube circuit and saves you a connector plus a port where a plain run-and-take-off is all you need. The D suffix makes the body black rather than the standard grey, which helps the branch stand out on a crowded manifold board.
It uses the standard resin one-touch spec profile: push the Dia 6 tube into the run end and the Dia 4 tube into the branch and the internal chuck grips each on its own OD; press the release ring and the tube frees. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), vacuum to -750 mmHg, proof pressure 1.5 MPa, and temperature -20 to +70 C. The tube is soft nylon or polyurethane, and the contacting internals are POM chuck, aluminium-alloy guide, stainless spring gasket and NBR O-ring. At the reduction itself, remember the smaller bore, not the fitting, sets what the branch can carry.
Airtac PKG Reducing Five-Way Fitting PKG6-4D Technical Specifications
| Model | Airtac PKG Reducing Five-Way Fitting PKG6-4D |
|---|---|
| Type | Reducer triple branch union |
| Series | PKG |
| 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 PKG Reducing Five-Way Fitting PKG6-4D
| PKG | Reducer triple branch union. |
|---|---|
| 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 PKG Reducing Five-Way Fitting PKG6-4D Is Used
Bottling line guide-rail adjustment
On a bottle rinser, the Dia 6 distribution rail runs the length of the frame, but each guide-rail trim cylinder is small. PKG6-4D steps the rail down to Dia 4 tubing at each station, so the branch can use tight bends around the conveyor guard without kinking.
Vial-filling station gripper feed
A pharmaceutical filling carousel carries a Dia 6 supply loop to each head, while the stopper-place gripper needs only a light Dia 4 feed. A reducer union at the loop gives that drop without adding a threaded tee into a wash-down area you would rather keep port-free.
Carton sealer vacuum-ejector pilot
Pneumatic vacuum ejectors on packaging machines draw their pilot air through a small bore. Taking a Dia 4 branch off the Dia 6 machine run with PKG6-4D keeps the ejector pilot line lean and easy to route through the sealer's head frame.
Is the Airtac PKG Reducing Five-Way Fitting PKG6-4D the Right Part?
Dia 4 is the smallest branch this union family offers, so there is no step below PKG6-4D - if your branch tube is even smaller you need a different approach. One step up is PKG8-6 (Dia 8 run to Dia 6 branch), which suits a heavier main rail where the take-off still only has to feed a light-duty actuator. Step up when the branch line itself must carry real work; stay at 6-4 when the reduction exists mainly to let you run cheaper, tighter-bend Dia 4 tubing to a small consumer.
Because PKG has no thread, nothing here has to match a port size - match the tube ODs instead, and match them exactly: a Dia 6 socket will not reliably hold 1/4 in (6.35 mm) tube even though the difference is only a third of a millimetre. If you actually need a threaded take-off from a Dia 6 run, PKD6-401 (Dia 6 with a Dia 4 branch off a 1/8 in male thread) is the related threaded 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 PKG Reducing Five-Way Fitting PKG6-4D FAQ
It is a resin one-touch reducer triple branch union joining a Dia 6 mm main run to a Dia 4 mm branch, tube-to-tube with no thread. Working pressure 0-1.0 MPa (0-10 kgf/cm2), usable to -750 mmHg (10 Torr) vacuum, proof pressure 1.5 MPa, operating temperature -20 to +70 C. Tubing is soft nylon or polyurethane, and the D suffix means the body is black instead of grey.
No. Each socket's chuck grips one tube OD only, and tolerance is exact: the Dia 6 end takes genuine 6 mm OD tube and will not hold 1/4 in (6.35 mm) tube, while the Dia 4 end takes only 4 mm tube. To release, push the tube in and press the release ring before pulling it out - attempting to swap sizes at one socket is the most common cause of a weeping joint on reducer unions.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard parts are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC One-Touch Fittings
Request a Quote for Airtac PKG Reducing Five-Way Fitting PKG6-4D
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.