Airtac PSL Throttle Speed Control Fitting PSL4-01A
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL4-01A 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 PSL4-01A
The AirTAC PSL4-01A is a compact speed controller for Dia 4 soft nylon or polyurethane tubing with a 1/8in PT thread port. It throttles air in one direction while letting it pass freely the other way, so an actuator can be slowed without choking its return stroke. This A-suffix code is the meter-out type: flow from the thread port out to the tube is controlled, and the reverse direction runs free. AirTAC names meter-out the first priority, because throttling the exhaust of a solenoid-driven double-acting cylinder leaves a back-pressure cushion that keeps the stroke smooth instead of letting it slam home.
Adjustment is a knob with an aluminium locking cap that clamps the trim against machine vibration; press the cap down after setting so the speed survives daily shaking. Inside, a brass throttling column sits in a brass body with a PBT holder and NBR seals, rated 0-1.0 MPa and -20 to +70 C. At Dia 4 this is the smallest bore in the PSL ladder, aimed at small cylinders, grippers and pilot lines where a small needle movement produces a clearly visible change in speed. Like every controller in this catalogue it carries no built-in silencer, and it still weeps slightly when fully closed, so it must never be used as a shut-off.
Airtac PSL Throttle Speed Control Fitting PSL4-01A Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL4-01A |
|---|---|
| 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 PSL4-01A
| 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 PSL4-01A Is Used
SMD pick-and-place gantry
A small pneumatic arm lifting and placing surface-mount components must descend without bounce. The Dia 4 bore matches the compact guide cylinders on desktop placement stations, and the meter-out trim gives a damped touchdown on every cycle.
Vial capping head
A capping press on a pharmaceutical filling line must close gently onto glass vials to avoid chipping. Throttle the exhaust with this A-type controller and the aluminium locking cap holds the setting despite the constant washdown-line vibration nearby.
Electronics tray indexing pusher
A pusher that advances plastic component trays between conveyor pitches has to arrive in time with the chain. Meter-out control on the Dia 4 feed line lets the maintenance team dial the push speed to the conveyor pitch and lock it in.
Is the Airtac PSL Throttle Speed Control Fitting PSL4-01A the Right Part?
Match the control method to the actuator before the size: meter-out (this A code) suits a double-acting cylinder fed by a solenoid valve, while meter-in (B codes) suits single-acting cylinders and tends to stick-slip on double-acting ones under varying load. Body style is the other choice: PSS if the tube must swivel 360 degrees, PSA for inline tube-to-tube with no thread port, PTL if a push-lock cap that resists being knocked out of adjustment is worth a slower hand set. On the ladder, the step down in thread is the M5 version of the same Dia 4 controller, which saves port space on compact manifolds; the step up is Dia 6 tubing on the same 1/8in thread, which raises the bore for larger actuators. Mount the controller at the cylinder port rather than back at the valve, so the throttled air volume stays small and response stays crisp.
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 PSL4-01A FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), usable under vacuum to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and a temperature range of -20 to +70 C. This SKU takes Dia 4 soft nylon or polyurethane tubing on a 1/8in PT thread port, the smallest bore in the PSL range. Flow capacity is published by AirTAC as a characteristic curve only, so size by tube bore rather than a quoted flow number.
No to both. A speed controller is designed to leak slightly when fully closed, so it must not be presented as an isolation valve - use a PHV finger valve for genuine shut-off. AirTAC also publishes no turns-from-closed figure for these controllers, so set the speed by observing the actuator stroke and then lock the knob cap. Silencers are separate parts and are not built into this body.
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Covers non-human-caused product damage.
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Standard parts are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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