
The AirTAC Airtac PHW F Thread Swivel Tee Fitting PHW401-S is a genuine double universal male elbow for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
The PHW401-S is AirTAC's double universal male elbow in the one-touch range, taking Dia 4 mm soft nylon or PU tube onto a 1/8in PT male thread. Unlike a fixed elbow, both joints swivel, so the tube run can leave the port at any angle you set - useful where two bends are needed in cramped space and a standard PL would fight the routing. To connect, push the tube straight home; the internal chuck grips it, and the release ring frees it again when you need to rework the line.
This is the -S variant: the male stud is SUS304 stainless steel while the body stays glass-reinforced PBT, so treat it as a corrosion-resistant stud rather than a solid stainless fitting. Ratings follow the standard resin profile: 0-1.0 MPa working pressure, 1.5 MPa proof, -20 to +70 C, and -750 mmHg vacuum. The thread arrives with sealant already applied, and no M5 version of PHW exists at all.
| Model | Airtac PHW F Thread Swivel Tee Fitting PHW401-S |
|---|---|
| Type | Double universal male elbow |
| Series | PHW |
| 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.
| PHW | Double universal male elbow. |
|---|---|
| 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. |
On a small robotic pick-and-place head, vacuum and blow-off lines often need two direction changes at the gripper. The double swivel lets the Dia 4 PU tube exit at whatever angle clears the wrist casting.
Machine-vision and inspection stations cram solenoid banks, sensors and air jets into small enclosures. A 1/8in double elbow fed by 4 mm tube keeps jet supply lines tight to the block instead of looping outside the guard.
Benchtop liquid-handling and sampling modules use 4 mm pneumatic lines to actuate tiny valves. The SUS304 stud resists corrosion from occasional splash in wet chemistry benches where a plain brass stud would dull.
Dia 4 is the smallest tube PHW is made in, so there is no size below it - the next step up is PHW601 at Dia 6, which buys you more bore for the same 1/8in thread. On threads, 1/8in is also the floor for this series: PHW has no M5 option, and if you step up to a 1/4in port the smallest tube PHW supports jumps to Dia 6, so a Dia 4 x 1/4in combination simply is not in the catalogue. Match the tube OD exactly - a Dia 4 chuck will not seal on 1/4in (6.35 mm) tube even though the sizes look close. If your port faces a wall, a PMF bulkhead or PLM arrangement is a better answer than swivelling an elbow into it.
Quick checklist
It is a double universal male elbow joining Dia 4 mm tube to a 1/8in PT male thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, vacuum down to -750 mmHg (10 Torr), and temperature -20 to +70 C. In this -S version the male stud is SUS304 stainless while the body is PBT; pressure and temperature figures are identical to the standard PHW401.
No. On the PHW family only the threaded male stud is SUS304; the elbow body remains PBT with the usual POM release button, aluminium guide and NBR O-ring. If you need an all-stainless body on a straight connector, the -S versions of PC and POC are the ones where the body itself becomes stainless 304. The rating figures do not change with the -S suffix.
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