Airtac PSL Throttle Speed Control Fitting PSL6-03A
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL6-03A 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 PSL6-03A
The PSL6-03A is an inline-ported speed controller that sets actuator speed by throttling air in one direction and letting it pass freely in the other. This is the A suffix, AirTAC's meter-out version: flow from the 3/8in thread port into the Dia 6 tube is throttled, and the reverse direction runs unobstructed. AirTAC lists meter-out as the first priority choice because the controlled restriction leaves a back-pressure cushion in a double-acting cylinder, so the stroke stays smooth instead of sticking and slipping under a changing load.
Adjustment is a grey knob over an aluminium locking cap: set the speed by hand, then screw the cap down so vibration cannot drift the setting. The body is brass with a brass throttling column, mounted in a PBT plastic holder with NBR seals. Note the fixed geometry - the tube stem points one way and the thread ports the other, so plan the plumbing before you order.
Airtac PSL Throttle Speed Control Fitting PSL6-03A Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL6-03A |
|---|---|
| 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 PSL6-03A
| 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 PSL6-03A Is Used
SMT board pick-and-place head
A Dia 6 feed on a placement gantry is the classic bore for small vacuum and clamp actuators; meter-out throttling keeps the Z-axis descent from slamming onto the PCB nest.
Bottling line indexing pusher
A 3/8in port near the cylinder keeps the restriction close to the actuator, timing each pusher stroke to the conveyor pitch without a controller block halfway down the machine frame.
Clamping fixture on machined extrusion
Meter-out control on a clamp cylinder closing onto finished anodised aluminium surfaces lets the operator dial in a gentle final approach, then lock the knob cap so the setting survives shift after shift.
Is the Airtac PSL Throttle Speed Control Fitting PSL6-03A the Right Part?
Pick the A meter-out version for a solenoid valve driving a double-acting cylinder; the cushioned exhaust is what keeps pick-and-place and clamp strokes from snatching. The B meter-in variant of this same body suits single-acting cylinders instead. If you need the tube to swivel to any angle after installation, the PSS universal body does that; if you want tube-to-tube with no thread port at all, step to the PSA straight type. Prefer a setting that cannot be knocked? The PTL push-lock family trades the knob for a press-to-unlock cap.
Sizing on the 3/8in ladder: Dia 6 is the smallest tube AirTAC pairs with a 3/8in PSL, so there is no smaller bore on this thread - step the thread down to PSL6-02A (1/4in) if the port is smaller. Stepping up to PSL8-03A adds 2mm of bore, which means a visibly freer free-flow direction and quicker unthrottled retract. Whichever you choose, fit the controller at the cylinder port, not at the valve, so the volume of air being throttled stays small and the speed response is 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 PSL6-03A FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), usable under vacuum down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and an operating temperature range of -20 to +70 C. This SKU takes Dia 6 soft nylon or polyurethane tubing on a 3/8in PT thread, with the A meter-out flow direction. The standard body colour is grey; a D suffix code would be black.
No on both counts. A speed controller, even fully closed, is not a shut-off valve - it is designed to pass a slight leak when closed, so use a PHV finger valve where a circuit genuinely has to be isolated. And the locking-cap torque table applies only to PTL push-lock types; here you hand-tighten the knob and its aluminium locking cap, no torque value is specified.
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