Airtac PSL Throttle Speed Control Fitting PSL602A
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL602A 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 PSL602A
The PSL602A is an in-line speed controller that screws into a 1/4in PT port and grips Dia 6 soft nylon or polyurethane tubing with a one-touch fitting. It throttles air in one direction and lets it pass almost unobstructed the other way, which is how you set an actuator's stroke speed without choking the whole circuit.
The A suffix means meter-out: flow from the thread port to the tube is restricted, and the return path runs free. AirTAC treats meter-out as the first choice because throttling the exhaust of a double-acting cylinder builds a back-pressure cushion that keeps the piston from lurching under a changing load. Adjustment is a manual knob with an aluminium locking cap - once the speed is right, screw the cap down and vibration cannot walk the setting away. Body and column are brass with a PBT holder and NBR seal, rated 0-1.0 MPa, -20 to +70 C.
Airtac PSL Throttle Speed Control Fitting PSL602A Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL602A |
|---|---|
| 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 PSL602A
| 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 PSL602A Is Used
Pick-and-place arm descent
A small Cartesian arm lifting PCB assemblies needs a controlled descent so the vacuum cup does not overshoot the placement height. Meter-out throttling at the cylinder port cushions the downstroke while the free leg keeps the lift stroke quick.
Clamp on a finishing station
A swing clamp closing a lacquered timber panel into a jig must land gently to avoid marking the surface. The PSL602A's locked knob setting holds that gentle closure speed shift after shift.
Indexing pusher timing
A pusher that sorts cartons off a 1/4in-ported conveyor manifold needs a repeatable extend cycle timed to photo-eye pulses. Locking the knob after tuning keeps the index time stable despite plant vibration.
Is the Airtac PSL Throttle Speed Control Fitting PSL602A the Right Part?
At 1/4in thread this size ladder offers Dia 6, 8 and 10 tube. Stepping down to PSL402A means moving to the 1/8in thread list, where Dia 4 and Dia 6 exist - a smaller bore for light grippers and low-flow pilots. Stepping up to PSL802A keeps the same 1/4in port but feeds Dia 8 tubing with more passage area, which suits longer stroke cylinders where the free-flow leg should not strangle the retract. Whichever you pick, mount the controller directly at the cylinder port so only the short air volume between throttle and piston is metered.
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 PSL602A FAQ
It is a Dia 6 tube, 1/4in PT thread, meter-out (A) speed controller. 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 is soft nylon or polyurethane; grey is standard, and the D suffix gives black.
No. A speed controller leaks slightly when backed fully off by design, so it is not a shut-off valve. Use it only to set speed. For isolating a circuit you need a manual shut-off such as the AirTAC PHV finger valve, or a ball valve upstream.
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