Airtac PSL Throttle Speed Control Fitting PSL10-04A
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL10-04A 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 PSL10-04A
The PSL10-04A is a threaded, one-touch speed controller that sets how fast an actuator moves by restricting air in one direction only. This is the A suffix code, so it is meter-out: flow entering the 1/2in PT thread port and leaving through the Dia 10mm tube is throttled by the brass needle, while air returning the other way passes through a check path unobstructed. AirTAC lists meter-out as the first-priority control method, because on a solenoid-valve-driven double-acting cylinder the throttled exhaust builds a back-pressure cushion that keeps the stroke smooth instead of lurching under changing load. The handle is engraved A so nobody sets it backwards on the machine.
Adjustment is a knurled knob with an aluminium locking cap: set the speed, then screw the cap down so vibration cannot drift the setting. The body screws into a 1/2in PT port and accepts Dia 10mm soft nylon or polyurethane tubing with a push-in seal. Internally it pairs a brass throttling column with a brass body, a PBT holder and an NBR O-ring, and it is rated to 0-1.0 MPa working pressure and -20 to +70 C. Note that the tube direction is fixed on this body - the fitting cannot swivel, so plan your tubing route before tightening.
Airtac PSL Throttle Speed Control Fitting PSL10-04A Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL10-04A |
|---|---|
| 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 PSL10-04A
| 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 PSL10-04A Is Used
CNC fixture clamping
Throttle the closing stroke of a pneumatic clamp so it seats gently onto a freshly machined aluminium face instead of marking it, then let the return stroke run free through the check path.
Pick-and-place gantry
Set the descent speed of a Dia 10mm-tubed vertical cylinder lifting glass or sheet-metal panels, so the part is lowered onto a nest without slam or bounce at end of stroke.
Carton indexing pusher
Time a packaging-line pusher to the conveyor pitch by trimming its extend speed; the locking cap keeps the timing fixed through a full shift of vibration.
Is the Airtac PSL Throttle Speed Control Fitting PSL10-04A the Right Part?
Size this part by the actuator port, not by a flow number. On the 1/2in PT thread the PSL ladder offers only three bores: Dia 8, Dia 10 and Dia 12. Stepping down to PSL8-04A gives finer low-speed adjustment on a smaller cylinder; stepping up to PSL12-04A suits large-bore actuators that move more air. Dia 10 is the middle step and the usual choice for 1/2in-portied cylinders in the 80 to 125mm bore range. If you need meter-in control for a single-acting cylinder, order the B suffix instead of A.
Choose a PSL over the swivelling PSS when the tube leaves in a fixed direction, and over the inline PSA when you want the controller threaded straight into the cylinder port. That last point matters: mount the controller at the actuator itself so the throttled air volume stays small and response stays crisp, rather than throttling a long supply line back at the valve manifold.
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 PSL10-04A FAQ
Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it also tolerates negative pressure down to -750 mmHg (10 Torr), and the proof pressure is 1.5 MPa. The temperature range is -20 to +70 C. This specific code is a meter-out (A) controller with a Dia 10mm tube and a 1/2in PT thread, fitted with a knurled knob and aluminium locking cap. It is rated for soft nylon or polyurethane tubing only.
No. A speed controller is designed to leak slightly when fully closed, so it must never be relied on to isolate a circuit. For a manual shut-off in the same Dia 10mm size, use the AirTAC PHV10A or PHV10B finger valve, which is a true quarter-turn shutoff valve. Also note the PSL10-04A has no built-in silencer; if exhaust noise at the valve is an issue, fit a separate silencer to the valve exhaust port.
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