Airtac PYB Y-Type Threaded Tee Fitting PYB401-S
SUS304 stainless variant (-S)The AirTAC Airtac PYB Y-Type Threaded Tee Fitting PYB401-S is a genuine branch y for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeBranch Y
- SeriesPYB
- 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 PYB Y-Type Threaded Tee Fitting PYB401-S
The PYB401-S is the SUS304-stud version of the AirTAC PYB branch Y, a one-touch fitting that pushes a Dia 4 mm soft nylon or polyurethane tube into an angled Y body and screws a 1/8in PT male stud into the port. The Y shape does what a tee cannot: it splits one feed into two branches that leave the body at an angle, so both tube runs can turn toward their actuators instead of one hanging off at 90 degrees. Connection is the standard one-touch action - push the tube home and the POM chuck with its stainless spring gasket grips it; press the release ring and the tube frees. The body is PBT with an aluminium-alloy guide and NBR O-ring, and the stud arrives with sealant already on the thread.
The -S suffix changes one thing and one thing only: the threaded stud is Stainless steel 304 instead of brass. The body remains PBT - this is not a solid stainless part - and the dimension tables match the standard grey PYB401 exactly. Every rating is unchanged: 0-1.0 MPa working pressure, -750 mmHg (10 Torr) vacuum, 1.5 MPa proof pressure, -20 to +70 C. The reason to buy it is the stud surface: in humid, splashy or periodically washed-down cells, a brass stud is the first point to discolour and corrode, and the SUS304 stud holds up where it does.
Airtac PYB Y-Type Threaded Tee Fitting PYB401-S Technical Specifications
| Model | Airtac PYB Y-Type Threaded Tee Fitting PYB401-S |
|---|---|
| Type | Branch Y |
| Series | PYB |
| Connection | Push-in one-touch |
| Body material | Stainless steel 304 (-S variant) |
| 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. Stainless (-S): SUS304 in place of brass - a solid SUS304 body on the PC and POC straight connectors, and a PBT body with a SUS304 stud on the elbow, tee and branch shapes. Working pressure, proof pressure and temperature are unchanged from the standard version. AirTAC publishes flow as a characteristic curve rather than a single figure, so no L/min value is listed.
Model Code: Airtac PYB Y-Type Threaded Tee Fitting PYB401-S
| PYB | Branch 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. |
| -S | Stainless-steel body. |
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 PYB Y-Type Threaded Tee Fitting PYB401-S Is Used
Pick-and-place gripper feed
Split a single 1/8in port on a small rotary actuator into two Dia 4 lines feeding parallel gripper cylinders on an electronics assembly head.
Bench-top lab automation
Branch one regulated 4mm supply to two small suction or blow-off nozzles on a microplate handling or dispensing station built around 1/8in ports.
Routing inside tight guards
The angled Y body lets both 4mm tubes leave at an angle rather than one running perpendicular, easing bends in a cramped machine guard next to the valve manifold.
Is the Airtac PYB Y-Type Threaded Tee Fitting PYB401-S the Right Part?
Dia 4 is the smallest tube this Y branch offers on a 1/8in thread - there is nothing below it in the PYB range, so if 4 mm is too small you step up rather than down. PYB601 keeps the same 1/8in port but opens the bore to 6 mm for more capacity through the fitting; PYB801 goes further if the hoses allow. On the thread side, PYB40M5 swaps the 1/8in PT stud for an M5x0.8 stud, which seals with a gasket rather than thread sealant and suits small manifold tappings. Whichever you choose, the tube OD must match exactly - a Dia 4 chuck will not seal on 6 mm or 1/4in tube.
Choose this shape when one port must feed two lines at an angle. If the run has to pass through a panel wall instead, the PM bulkhead union in the same size carries the tube through and locks with a locknut; if the port points the wrong way and you need a single line turned, a PH universal male elbow bends the direction rather than splitting it. To step a Dia 8 branch down to this 4 mm line directly, the PG8-4 different-diameter straight union joins the two tubes without a thread in between.
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 PYB Y-Type Threaded Tee Fitting PYB401-S FAQ
It joins Dia 4 mm OD soft nylon or polyurethane tube to a 1/8in PT male thread, splitting the feed into two angled branches. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), vacuum to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and temperature range -20 to +70 C. The -S suffix puts a SUS304 stud on the same body; every other figure matches the standard PYB401.
Only the threaded stud material: SUS304 instead of brass. The PBT body, POM release button and chuck, stainless spring gasket and NBR O-ring are the same, the dimensions are identical, and no pressure or temperature figure changes. AirTAC publishes no food, medical or corrosion-class certification for the -S line, so specify it for its corrosion resistance at the stud, not for a certified grade.
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