The AirTAC Airtac PHF Tandem Toggle Joint PHF803-S is a genuine universal female elbow for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
The PHF803-S is an AirTAC PHF universal female elbow, joining Dia 8 mm soft nylon or polyurethane tubing to a 3/8 in PT female thread. Push the tube home and the stainless spring gasket inside the chuck grips it straight away; press the POM release ring and the tube frees off again for re-routing or replacement. Because this is a universal elbow, the threaded leg can be screwed into the port first and the whole fitting then rotated to the angle the pipework actually needs - there is no need to predict the final orientation before assembly.
The -S suffix marks the SUS304 variant: on this PHF family the stainless steel 304 goes into the stud, while the elbow body stays PBT with a POM release button, aluminium-alloy guide and NBR O-ring. Ratings are unchanged from the standard version - 0-1.0 MPa working pressure, 1.5 MPa proof pressure and -20 to +70 C. Choose it where wash-down moisture or corrosive surroundings would attack a plain brass stud; the stainless part swaps in with identical dimensions.
| Model | Airtac PHF Tandem Toggle Joint PHF803-S |
|---|---|
| Type | Universal female elbow |
| Series | PHF |
| 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.
| PHF | Universal female 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 bakery or dairy conveyor frames, caustic wash-down mist corrodes plated brass studs near cylinder ports. The SUS304 stud on this 3/8 in female elbow resists that environment while the PBT body keeps the one-touch mechanism light and easy to service.
Where a compact pneumatic gripper sits under a robot arm, the universal elbow lets you thread the 3/8 in port first and rotate the fitting until the Dia 8 PU tube clears the guard and the cable chain in the same motion.
Plating tanks fill the surrounding air with acidic vapour that pits standard brass fittings on cylinder drop legs. A SUS304-studded PHF803-S elbow keeps those connections in service instead of being swapped out every maintenance round.
On the 3/8 in thread this PHF ladder runs from Dia 6 through Dia 12, so the step down is PHF603-S for a 6 mm drop leg and the step up is PHF1003-S for 10 mm. Dropping a size trims the bore and the air demand the run can feed; stepping up gives you a larger bore to work with. The same Dia 8 tube size also exists on 1/8, 1/4 and 1/2 in threads in this prefix, so match the female thread to the male port you are sealing - a 3/8 PT female nut will not seal correctly on a 1/4 in male stud. As always, tubing OD must match exactly: an 8 mm one-touch chuck will not hold 5/16 in tube.
Quick checklist
It joins Dia 8 mm soft nylon or polyurethane tube to a 3/8 in PT female thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it handles vacuum down to -750 mmHg (10 Torr), proof pressure is 1.5 MPa, and the operating temperature range is -20 to +70 C. As a -S variant, its stud is SUS304 stainless steel.
No. On this PHF family only the stud is SUS304; the elbow body remains PBT with a POM release button, an aluminium-alloy guide and an NBR O-ring. AirTAC publishes no other stainless grade for this part, and the dimensions and pressure ratings match the standard version exactly.
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