Airtac PSL Throttle Speed Control Fitting PSL1003B
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL1003B 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 PSL1003B
The AirTAC PSL1003B is a Dia 10mm speed controller with a 3/8in PT thread port, marked B for meter-in control. Air flowing from the thread port into the tube passes freely, while the flow in the reverse direction is throttled. AirTAC positions meter-in control as the choice for single-acting cylinders, where there is no second port to exhaust through, so the controlled fill direction sets the stroke speed directly.
Adjustment is a manual knob with an aluminium locking cap that clamps the setting in place, so vibration or a passing operator cannot drift it. The throttling column and body are brass, the body and holder are PBT plastic, and the seal is an NBR O-ring. The fixed tube direction points the 10mm soft nylon or polyurethane hose away from the machine port, keeping the wiring of a dense manifold predictable.
Airtac PSL Throttle Speed Control Fitting PSL1003B Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL1003B |
|---|---|
| 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 PSL1003B
| 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 PSL1003B Is Used
Spring-return fixture clamp
A single-acting clamp on a CNC fixture closes gently onto a machined face because the B meter-in control sets the fill speed while the spring retracts freely.
Carton flap kicker on a packaging line
A Dia 10 kick cylinder folds carton flaps at conveyor speed, and the locking cap keeps the timing fixed through washdown-vibration shifts.
Pallet pusher on a forming press line
A single-acting pusher nudges blanks off a stacking table, with the 3/8in PT port threaded straight into the manifold block.
Is the Airtac PSL Throttle Speed Control Fitting PSL1003B the Right Part?
This is a meter-in (B) unit, so pick it over the A version when the actuator is single-acting, such as a spring-return clamp or a kick cylinder. On a double-acting cylinder, AirTAC's own guidance favours meter-out (A) because exhaust throttling builds a back-pressure cushion and the stroke stays smooth; meter-in on that type can stick-slip as the load changes. Body-wise, PSL is the fixed-direction form; if you need the tube to swivel to suit hose routing, the PSS1003B universal version covers Dia 10 at the same 3/8in port.
Sizing: one step down in the PSL 3/8in ladder is Dia 8 (PSL803B) for smaller lines, and one step up is Dia 12 (PSL1203B) for larger actuators - the bigger bore carries proportionally more flow for the same knob position. Mount the controller directly at the cylinder port 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 PSL1003B FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, usable vacuum to -750 mmHg (10 Torr), and a working temperature range of -20 to +70 C. This SKU takes Dia 10mm soft nylon or polyurethane tubing on a 3/8in PT thread port and is supplied in grey (add the D suffix for black).
Yes. The PSL design pairs the adjustment knob with an aluminium locking cap: screw the cap down after setting and the throttle position is clamped, which stops drift from machine vibration. Note that this is a speed controller, not a shut-off valve - it leaks slightly when fully closed by design, so use the PHV finger valve if a circuit genuinely needs isolating.
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