
The AirTAC Airtac PYB Y-Type Threaded Tee Fitting PYB1204 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.
The AirTAC PYB1204 is a branch Y one-touch fitting: a male 1/2 in PT threaded stem that splits into two angled tube ports, each taking 12 mm OD soft nylon or polyurethane tubing. Push the tube home and the internal chuck grips it under system pressure; press the POM release ring and the tube frees off for rework. No tools, no ferrules, no braided-hose crimping on the shop floor.
This is a resin and brass one-touch part, so it runs the standard resin spec: working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum down to -750 mmHg, proof pressure 1.5 MPa, and a temperature window of -20 to +70 C. The 1/2 in PT thread arrives with sealant already applied, and the body is grey as standard - order the -D suffix if your panel builder wants black.
| Model | Airtac PYB Y-Type Threaded Tee Fitting PYB1204 |
|---|---|
| Type | Branch Y |
| Series | PYB |
| 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.
| 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. |
A six-axis robot wrist carrying a two-jaw gripper needs parallel supply lines to both jaws. The Y split from a single 1/2 in port on the wrist manifold feeds two Dia 12 lines without adding a tee block in the crowded forearm.
End-of-line palletisers often run two pusher cylinders side by side. Branching off one 1/2 in machine port with the PYB1204 keeps both Dia 12 actuator lines fed from the same valve output and firing in sync.
Pneumatically actuated rinse valves on a plating or wash line can share one air stem through the Y branch, with the resin body handling the -750 mmHg vacuum purge cycle between rinses.
Dia 12 is the top of the tube ladder on a 1/2 in PYB thread, so there is no step up within this thread - if you need larger you are outside this catalogue. Step down to PYB1004 (Dia 10) or PYB804 (Dia 8) when your actuators are smaller; flow capacity follows the bore, so the 12 mm bore is the pick for long runs or high-consumption cylinders. If your port is 3/8 in instead, PYB1203 keeps the same Dia 12 tube on a smaller thread. And measure before you order: a Dia 12 chuck will not seal on 1/2 in (12.7 mm) tube - the OD must match exactly.
Quick checklist
It is an AirTAC PYB branch Y one-touch fitting with a 12 mm tube OD on both branch ports and a 1/2 in PT male thread. Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg, proof pressure 1.5 MPa, operating temperature -20 to +70 C. Tubing must be soft nylon or polyurethane, and the body is grey as standard.
The PYB takes its two tube lines off at a Y angle rather than perpendicular, so each tube leaves with less side loading and a gentler bend radius - useful where rigid nylon tube is run between moving members. A PED tee suits right-angle routing; the Y suits paired actuators fed from one direction.
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