Airtac PHK Swivel Reducing Five-way Fitting PHK8-6
The AirTAC Airtac PHK Swivel Reducing Five-way Fitting PHK8-6 is a genuine universal 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.
- TypeUniversal reducer triple branch union
- SeriesPHK
- 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 PHK Swivel Reducing Five-way Fitting PHK8-6
The PHK8-6 is AirTAC's universal reducer triple branch union, an all-tube fitting with no external thread at all. The straight run through the body accepts Dia 8 mm tubing at both ends, while the branch port is reduced to take Dia 6 mm tube, so a single push-in part replaces what would otherwise be a tee plus two reducer adapters. Push each tube firmly into its port until it bottoms out: the internal stainless spring gasket and chuck grip the tube wall, and pressing the release ring frees it again.
This is a resin-line part, not a metal one: working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum down to -750 mmHg (10 Torr), proof pressure 1.5 MPa and a temperature window of -20 to +70 C. It is intended for soft nylon or polyurethane tubing, and the grey PBT body carries POM release buttons, an aluminium-alloy guide and an NBR O-ring seal on each port.
Airtac PHK Swivel Reducing Five-way Fitting PHK8-6 Technical Specifications
| Model | Airtac PHK Swivel Reducing Five-way Fitting PHK8-6 |
|---|---|
| Type | Universal reducer triple branch union |
| Series | PHK |
| 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 PHK Swivel Reducing Five-way Fitting PHK8-6
| PHK | Universal 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 PHK Swivel Reducing Five-way Fitting PHK8-6 Is Used
Manifold branch drop on a packaging machine
Tap a 6 mm feed to a small vacuum generator or ejector straight off an 8 mm manifold run, with the reduced bore matching the ejector's supply port exactly.
Pick-and-place cylinder feed
Split an 8 mm air line at the end of a gantry to feed a compact 6 mm bore gripper cylinder, keeping the branch short and the fitting count low.
Instrument air take-off on a test bench
Branch a 6 mm line to a pressure transducer or small pilot valve from an 8 mm bench main, where the lighter tubing keeps the instrument plumbed without adapters.
Is the Airtac PHK Swivel Reducing Five-way Fitting PHK8-6 the Right Part?
The reducer ladder around this size is PHK6-4 below it and PHK10-8 above it. Stepping down to PHK6-4 shrinks the whole fitting for compact 6 mm circuits where the branch feeds small cylinders; stepping up to PHK10-8 keeps the 6 mm branch but feeds it from a heavier 10 mm main, useful when a long run from the supply side drops pressure. Choose PHK8-6 when the main is an 8 mm line and the take-off genuinely needs a smaller bore.
Two practical checks before ordering: tube OD must match the port exactly, because a Dia 6 branch port will not seal on 1/4 inch (6.35 mm) tube no matter how close it looks, and this fitting carries no thread, so if you need a tee that screws into a port, that is the PKD male reducer triple branch instead. The universal branch construction also lets you clock the tee to suit the routing rather than fighting tube twist.
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 PHK Swivel Reducing Five-way Fitting PHK8-6 FAQ
It is a universal reducer triple branch union for soft nylon or polyurethane tube, joining a Dia 8 mm run to a Dia 6 mm branch, with no thread on the body. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it handles vacuum to -750 mmHg (10 Torr), proof pressure is 1.5 MPa, and the service temperature range is -20 to +70 C. The body is grey PBT with POM release buttons and NBR seals.
No. One-touch ports grip the exact tube OD they are sized for, so the Dia 6 branch accepts only 6 mm tube and will not seal on 1/4 inch (6.35 mm) tubing. If your circuit mixes inch and metric tubing, convert at a threaded fitting port rather than at this union, and check both tube ends match their ports before pushing them home.
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Covers non-human-caused product damage.
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