Airtac PSL Throttle Speed Control Fitting PSL8-02A
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL8-02A 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 PSL8-02A
The PSL8-02A is a fixed-direction speed controller that threads into a 1/4in PT port and accepts Dia 8mm one-touch tubing on the outlet. As an A-suffix part it throttles flow leaving the thread port toward the tube and lets the return direction pass freely, which is the meter-out arrangement AirTAC recommends as first choice. Throttling the exhaust of a double-acting cylinder builds a back-pressure cushion, so the piston is pushed by air on both sides of the stroke instead of being dragged by the load - the result is smooth travel without stick-slip when the load changes mid-stroke.
Adjustment is a knob on an aluminium-alloy locking cap: set the speed by hand, then snug the cap down so the setting survives machine vibration. The body uses a brass throttling column in a PBT plastic holder with an NBR seal, and it is rated for 0-1.0 MPa working pressure down to -750 mmHg vacuum, so it also works on vacuum ejector and pick circuits. A D suffix on the ordering code gives the same part in black if your panel standardises on that colour.
Airtac PSL Throttle Speed Control Fitting PSL8-02A Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL8-02A |
|---|---|
| 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 PSL8-02A
| 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 PSL8-02A Is Used
Indexing pusher on a conveyor line
A Dia 8 circuit on a box-indexing pusher is tuned with the PSL8-02A so each stroke completes inside the conveyor pitch window without overshooting the stop block, and the locking cap holds that timing through a full shift of vibration.
Gentle clamp on machined aluminium faces
Meter-out control cushions a clamp cylinder closing onto a freshly machined face, preventing the impact mark a fast-stroking clamp leaves on a finished surface.
Pick-and-place arm on an electronics assembly cell
Feeding a small double-acting arm with 8mm soft nylon tubing, the PSL8-02A slows the descend stroke so placed components are not pressed hard onto the PCB pad array.
Is the Airtac PSL Throttle Speed Control Fitting PSL8-02A the Right Part?
Step down to PSL6-02A if your tubing is Dia 6 and the actuator is a small clamp or gripper; step up to PSL10-02A for Dia 10 lines feeding larger bores. On the same Dia 8 tube you can also move the thread sideways: PSL8-01A for 1/8in ports, PSL8-03A for 3/8in or PSL8-04A for 1/2in - pick the one that matches the cylinder port you are actually screwing into, since the tube bore, not the thread, sets the airflow envelope. If you need a PSL shape with a PBT push-lock cap instead of a knob, that is the PTL ladder, and the PSS range is the version whose tube swivels 360 degrees for tight manifolds.
Mount the controller directly in the cylinder port rather than back at the valve manifold. The volume of trapped air being throttled shrinks to a few cubic centimetres, which is what makes the meter-out response crisp at the start of the stroke.
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 PSL8-02A FAQ
It is a PSL fixed-direction speed controller with a Dia 8mm one-touch tube outlet and a 1/4in PT male thread, meter-out (A) control. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, negative pressure down to -750 mmHg (10 Torr), and the operating temperature range is -20 to +70 C. Soft nylon or polyurethane tubing, grey body as standard with a D suffix for black. AirTAC publishes flow for this range as characteristic curves only, not as a fixed figure - judge capacity by the 8mm bore.
Screw it straight into the cylinder port and push the 8mm tube into the outlet there. Meter-out throttling works on the air leaving the actuator, and keeping the controller at the port means only the small air volume between the piston and the valve is being exhausted through the needle - the speed response is immediate and repeatable. If you mount it back at the manifold instead, the long tube volume between controller and cylinder compresses during the stroke and the motion becomes spongy and harder to dial in.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard parts are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Speed Controllers
Request a Quote for Airtac PSL Throttle Speed Control Fitting PSL8-02A
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.