Airtac PSL Throttle Speed Control Fitting PSL1004AD
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL1004AD 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 PSL1004AD
The PSL1004AD is a black-bodied PSL speed controller that sets the stroke speed of a pneumatic actuator by throttling the air in one direction while letting it pass freely in the other. The trailing A in the code marks it as meter-out: flow from the 1/2in thread port to the tube is controlled, and the return flow runs at full bore. AirTAC treats meter-out as the first-choice arrangement because throttling the exhaust leaves a back-pressure cushion inside a double-acting cylinder, so the load cannot run ahead of the air and the stroke stays smooth instead of sticking and slipping.
The part screws into a 1/2in PT port and grips Dia 10mm soft nylon or polyurethane tubing in a fixed direction - unlike the swivelling PSS, the PSL body does not rotate after installation. A knurled knob on top sets the restriction, and the aluminium-alloy locking cap beneath it clamps the setting so machine vibration cannot drift it. The D suffix gives the grey standard part a black finish, and the wetted materials are brass body and throttling column with NBR sealing.
Airtac PSL Throttle Speed Control Fitting PSL1004AD Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL1004AD |
|---|---|
| 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 PSL1004AD
| 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 PSL1004AD Is Used
Palletiser lift cylinder
A Dia 10mm feed on 1/2in ports suits the larger-bore vertical lift of a palletising head, where meter-out control stops the loaded carriage dropping unchecked at end of stroke.
Extrusion clamp in a machining cell
Clamping aluminium extrusion profiles before cutting needs a gentle, repeatable close - the locking cap holds the set speed shift after shift on a vibrating machine frame.
Bottling line stopper gate
A pneumatic stopper that rises under a moving bottle stream must index gently; meter-out throttling at the cylinder port times the rise to the conveyor pitch.
Is the Airtac PSL Throttle Speed Control Fitting PSL1004AD the Right Part?
Match the control method to the actuator before anything else. This A-suffix meter-out unit is the default for a solenoid valve driving a double-acting cylinder - the exhaust cushion it creates holds the stroke steady under a changing load. If your circuit uses a single-acting cylinder or a spring-return actuator, choose the B (meter-in) equivalent PSL1004BD instead, because meter-in control on a double-acting cylinder tends to stick-slip as the load varies.
On size, Dia 10mm at 1/2in sits in the middle of the PSL 1/2in ladder: step down to PSL804A (Dia 8mm) when the line feeds a smaller-bore cylinder or routing space is tight, or step up to PSL1204A (Dia 12mm) for larger volume cylinders where the wider bore keeps restriction low even when partly throttled. Whichever you pick, fit the controller directly at the cylinder port rather than back at the valve - the throttled volume then stays small and speed response is immediate. The PT tapered thread needs sealant tape on the male thread for a leak-tight make-off.
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 PSL1004AD FAQ
It is a Dia 10mm tube speed controller with a 1/2in PT thread, meter-out (A) control. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it withstands negative pressure down to -750 mmHg (10 Torr), proof pressure is 1.5 MPa, and the operating temperature range is -20 to +70 C. Tubing must be soft nylon or polyurethane, and the D suffix denotes the black body finish.
No. The PSL is the fixed-orientation body in AirTAC's range - once threaded into the 1/2in port, the tube outlet points where it points. If you need the tubing exit to swivel 360 degrees to suit routing, the same meter-out function is available in the swivelling PSS body; check the PSS ladder covers your size before switching. Do not back the PSL off its seat to re-aim it, as that opens the tapered PT thread and risks a leak.
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