Airtac PSL Throttle Speed Control Fitting PSL1003BD
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL1003BD 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 PSL1003BD
The PSL1003BD is a knob-type speed controller that sets how fast an actuator moves by throttling air in one direction while letting it pass freely in the other. The B suffix marks meter-in control: flow from the tube side back to the 3/8in PT thread port is throttled, while the supply direction from thread to tube runs free. AirTAC's own guidance points meter-in at single-acting cylinders, where controlling the stroke gives a smooth, predictable move; for double-acting cylinders the company rates meter-out (the A suffix) as first priority, because exhaust throttling builds a back-pressure cushion that stops stick-slip under changing load.
Adjustment is a knurled knob backed by an aluminium-alloy locking cap - set the speed, then tighten the cap down so machine vibration cannot drift the orifice between shifts. Inside are a brass throttling column and brass body held in a PBT plastic holder, sealed by an NBR O-ring with a POM interface. The PSL body keeps the tube outlet fixed; if you need the joint to rotate at the port, that is the PSS universal version instead. The D suffix on this code is the black body option.
Airtac PSL Throttle Speed Control Fitting PSL1003BD Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL1003BD |
|---|---|
| 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 PSL1003BD
| 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 PSL1003BD Is Used
Single-acting clamp return
On the spring-return clamping cylinder of a woodworking press, meter-in control damps the return stroke so jigs and finished panels are not jolted open at full spring speed.
Carton ejector timing
A single-acting kicker cylinder pushing misaligned cartons off a corrugated-box conveyor; the B control sets push speed so boxes slide off the edge instead of tumbling into the reject bin.
Coating lab lift table
A small single-acting pneumatic lift raising sample trays in a powder-coating laboratory, lowered at a fixed speed so wet parts are set down without splashing or shock loading the platform.
Is the Airtac PSL Throttle Speed Control Fitting PSL1003BD the Right Part?
This SKU sits mid-ladder on the PSL 3/8in thread, which runs Dia 6, 8, 10 and 12. Step down to PSL803BD for Dia 8 tubing or up to PSL1203BD for Dia 12 - the bore sets the shape of the flow curve, so match the size to the tubing already run to the actuator rather than oversizing the port. PSL603BD covers a small-bore retrofit on the same thread if you are downsizing a line.
Choose knob types like this when operators re-tune speeds during changeovers; choose a PTL push-lock version when the setting must survive an unprotected position near walkways or robot envelopes. Whichever you pick, screw the controller directly into the cylinder port so the throttled volume stays small and the cylinder responds crisply to each adjustment.
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 PSL1003BD FAQ
It is a Dia 10mm tube, 3/8in PT thread speed controller with meter-in (B) control and a black body. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa and temperature range -20 to +70 C. It accepts soft nylon or polyurethane tubing and is part of the PSL knob family with an aluminium locking cap.
Yes. PT is a tapered pipe thread, so seal the male thread with PTFE tape or a compatible pipe sealant before fitting it into the valve or cylinder port. Keep sealant away from the leading edge so shreds cannot migrate into the throttling orifice, and note that the tube joint itself is sealed by the internal O-ring, not by the thread treatment.
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