Airtac PSL Throttle Speed Control Fitting PSL1003BD-S
SUS304 stainless variant (-S)The AirTAC Airtac PSL Throttle Speed Control Fitting PSL1003BD-S 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-S
The PSL1003BD-S is a stainless speed controller that sets actuator stroke speed by throttling air in one direction while letting it pass freely the other way. The B suffix makes this the meter-in version: air running from the 3/8in PT thread port out to the Dia 10 tube is unrestricted, and the flow back from tube to thread is throttled. AirTAC pairs meter-in control with single-acting cylinders, where the supply side is the only side worth restricting.
Speed is set with a knob under an aluminium-alloy locking cap, so the adjustment stays where you left it through vibration and hose-down. In this -S variant the throttling column is SUS304 rather than the standard brass, with a stainless spring gasket, which suits plating shops, marine decks and food wash-down areas where copper is unwelcome. Ratings and dimensions are identical to the standard PSL1003BD, the D suffix gives a black body, and the tube port takes 10mm soft nylon or polyurethane tubing.
Airtac PSL Throttle Speed Control Fitting PSL1003BD-S Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL1003BD-S |
|---|---|
| Type | Speed controller, threaded elbow |
| Series | PSL |
| Adjustment | Knob with aluminium-alloy locking cap |
| Orientation | Fixed tube direction |
| Body material | Stainless steel 304 (-S variant) |
| 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. Stainless (-S): SUS304 throttling column and body parts in place of brass, for copper-free environments. Ratings are unchanged from the standard version. 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-S
| 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. |
| -S | Stainless-steel body. |
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-S Is Used
Electroplating jig lift
A single-acting spring-return lift cylinder on a plating line lowers loaded jigs at a controlled rate with meter-in throttling, and the SUS304 column keeps copper out of the bath environment.
Wash-down tray pusher
A single-acting pusher indexing trays across a seafood processing conveyor extends at a set speed, with the black body and stainless internals standing up to daily salt-water hose-down.
Chemical drum lid clamp
A spring-return clamp closes gently onto a 200L drum lid before dosing begins, so the seal is never slammed, on a line where brass contact with the process chemicals is not acceptable.
Is the Airtac PSL Throttle Speed Control Fitting PSL1003BD-S the Right Part?
This SKU sits mid-ladder on the 3/8in PSL thread: PSL803BD-S with a Dia 8 tube below it and PSL1203BD-S with a Dia 12 tube above it, both on the same port. Stepping up the bore raises the air volume the valve can handle for a given pressure drop, so match the tube to the cylinder bore rather than trying to compensate with a wider opening of a smaller valve. If your actuator is double-acting, AirTAC treats meter-out as the first priority, so the equivalent A code is usually the better match; meter-in on a double-acting cylinder can stick-slip as the load changes. Whichever direction you pick, fit the controller directly at the cylinder port so only the short stub of tubing downstream is throttled.
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-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, and a vacuum rating of -750 mmHg (10 Torr). Operating temperature is -20 to +70 C. This SKU is the Dia 10 tube size on a 3/8in PT thread, meter-in (B) control direction, black body, with a SUS304 throttling column in place of the standard brass one.
No. AirTAC rates the stainless variant identically and the dimension tables match, so it drops straight in without redesign. Only the throttling column material changes to SUS304, plus a stainless spring gasket. No surface finish, passivation or corrosion-class figure is published for this variant, so treat those properties as unspecified when specifying it.
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