Airtac PSL Throttle Speed Control Fitting PSL8-01A
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL8-01A is a genuine speed controller, threaded elbow with knob with aluminium-alloy locking cap and fixed tube direction, used to set the speed of a pneumatic cylinder by throttling its air.
- TypeSpeed controller, threaded elbow
- SeriesPSL
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- AdjustmentKnob with aluminium-alloy locking cap
- 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 PSL Throttle Speed Control Fitting PSL8-01A
The AirTAC PSL8-01A is an inline speed controller that throttles air in one direction and lets it run free in the other, so you can set how fast a cylinder strokes. This is the A version, which means meter-out: flow from the 1/8in PT thread port into the Dia 8mm tube is controlled, and the return path runs unthrottled. The handle is marked A. Meter-out is AirTAC's first-choice method because throttling the exhaust leaves a back-pressure cushion on a double-acting cylinder, keeping the stroke smooth instead of stick-slipping.
Adjustment is a knurled knob with an aluminium locking cap: set the speed by hand, then screw the cap down so vibration cannot drift the setting. The body is PBT plastic with a brass throttling column and brass body, and the tube direction is fixed - if your line needs a swivelling outlet, step across to the PSS series instead.
Airtac PSL Throttle Speed Control Fitting PSL8-01A Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL8-01A |
|---|---|
| Type | Speed controller, threaded elbow |
| Series | PSL |
| Adjustment | Knob with aluminium-alloy locking cap |
| Orientation | Fixed tube direction |
| 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. A speed controller is not a shut-off valve - a small leak past a fully closed needle is normal. Close it before applying air, and turn it open slowly. AirTAC publishes flow as a characteristic curve rather than a single figure, so no L/min value is listed.
Model Code: Airtac PSL Throttle Speed Control Fitting PSL8-01A
| PSL | Speed controller, threaded 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). |
| A / B | A = meter-out (controls flow from the thread port to the tube). B = meter-in. |
| D | Black. Blank = grey. |
Meter-Out or Meter-In?
- check Meter-out (A) is the default. It throttles the air LEAVING the cylinder, so the piston runs against a back-pressure cushion and moves smoothly.
- check Use meter-out on double-acting cylinders - it is the one AirTAC lists as first priority.
- check Meter-in (B) throttles air ENTERING the cylinder. It suits single-acting cylinders and air motors.
- check Meter-in on a double-acting cylinder tends to give a jerky, stick-slip stroke under varying load.
- check Fit the controller at the cylinder port, not at the valve, so the throttled volume is as small as possible.
Where the Airtac PSL Throttle Speed Control Fitting PSL8-01A Is Used
SMT gantry pick-and-place Z-axis
On an electronics assembly gantry, the down-stroke that lowers a vacuum head onto a populated PCB is fed through the thread port, so meter-out control caps the descent speed and the board is never slammed into the nest.
Woodworking press clamp pads
A clamp cylinder closing onto finished oak panels on a furniture line runs its closing stroke through this controller, letting the operator dial the pad down gently so varnished surfaces are not marked at contact.
Bottling line indexing pusher
On a bottle-filling conveyor, an indexing pusher timed to lane changes uses the Dia 8 bore for a longer stroke while the knob sets a repeatable push speed that keeps bottles upright through each index.
Is the Airtac PSL Throttle Speed Control Fitting PSL8-01A the Right Part?
Meter-out (this A model) suits a double-acting cylinder driven by a solenoid valve; meter-in (the B version) is for single-acting actuators. Choose a knob type like this when operators re-tune speed during setup, and a push-lock PTL type when the setting must survive being knocked. Your neighbours on the PSL ladder: PSL6-01A steps down to Dia 6 on the same 1/8in thread, while Dia 10 tube does not exist at 1/8in on PSL - going up to PSL10-02A moves you to a 1/4in PT thread. Note the Dia 8 bore passes more air than Dia 6, so it feeds larger-volume cylinders with finer low-speed control. Mount the controller directly at the cylinder port so the throttled air volume stays as small as possible for the sharpest response.
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
- ✓ Meter-out (A) unless you know you need meter-in
Airtac PSL Throttle Speed Control Fitting PSL8-01A FAQ
Working pressure is 0-1.0 MPa (0-10 kgf/cm2) with negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and fluid/ambient temperature -20 to +70 C. This SKU is the Dia 8mm tube size with a 1/8in PT thread, meter-out control (A), grey body. It accepts soft nylon or polyurethane tubing.
On the PSL series the published ladder pairs 1/8in PT with Dia 4, 6 and 8 tubes only - Dia 10 and Dia 12 tubes start at the 1/4in thread. If your cylinder ports are 1/4in or larger, use a PSL10-02A or PSL12-03A instead of forcing an adapter, since each added fitting adds a leak point and dead volume. Also remember this controller throttles flow; it is not a shut-off and will weep slightly when fully closed.
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