Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S
SUS304 stainless variant (-S)The AirTAC Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S is a genuine universal speed controller with knob with aluminium-alloy locking cap and 360 degree adjustable tube direction, used to set the speed of a pneumatic cylinder by throttling its air.
- TypeUniversal speed controller
- SeriesPSS
- 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S
The PSS1003B-S is a stainless-steel universal speed controller that sets actuator speed by throttling air in one direction while letting it pass unrestricted in the other. This code carries the B suffix, so it is a meter-in part: flow from the 3/8in thread port into the Dia 10 tube runs free, and the return path is throttled. AirTAC positions meter-in for single-acting cylinders, where the spring, not trapped back-pressure, drives the return stroke.
Unlike the fixed PSL body, the PSS tube nut swivels a full 360 degrees, so you can thread the port in first and then rotate the fitting to meet the tubing run without twisting the hose. The B mark is shown on the aluminium locking cap, which you loosen to turn the brass-style adjuster and re-tighten to lock the setting. In this -S variant the throttling column is SUS304 in place of brass and the throttling body is aluminium alloy or SUS304, with a stainless spring gasket. Ratings are identical to the standard line: 0-1.0 MPa working, 1.5 MPa proof, -20 to +70 C, and it holds vacuum down to -750 mmHg (10 Torr).
Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S Technical Specifications
| Model | Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S |
|---|---|
| Type | Universal speed controller |
| Series | PSS |
| Adjustment | Knob with aluminium-alloy locking cap |
| Orientation | 360 degree adjustable 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S
| PSS | Universal speed controller. |
|---|---|
| 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S Is Used
Wash-down conveyor stopper
A Dia 10 stopper cylinder that lifts pallets against a stainless guide rail on a food-line conveyor, with the meter-in control tuned for a gentle lift that does not jog the load.
Plating line lift ram
A lift ram dipping racks into an electroplating bath, where the SUS304 throttling column resists the acidic mist that pits brass fittings and the controlled stroke lowers racks smoothly into solution.
Trailer tailgate damper
A single-acting spring-return cylinder easing a marine or trailer tailgate down, with meter-in control on the supply side matching the return speed the spring can sustain.
Is the Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S the Right Part?
Match the control method to the actuator before anything else. Meter-in (B) suits single-acting cylinders; on a double-acting cylinder under varying load it tends to stick-slip, so pick a meter-out A code for that duty. Between the two body types, the PSS knob with locking cap is faster to set by hand than a push-lock cap, but needs the cap loosened first; push-lock types resist being knocked out of adjustment better.
Sizing on the PSS stainless ladder: at 3/8in thread, Dia 10 is the smallest tube offered, so there is no smaller neighbour on the same thread. Step down to PSS1002B-S (Dia 10, 1/4in PT) to suit a smaller port, or step up to PSS1203B-S (Dia 12, 3/8in PT) for a larger bore feeding bigger actuators. Larger bores pass more free-flow air, so the free stroke of the actuator gets quicker even though the controlled speed range stays similar. Fit 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, vacuum to -750 mmHg (10 Torr), operating temperature -20 to +70 C, PT thread standard. This SKU is the SUS304 stainless variant with a Dia 10 tube port and a 3/8in PT thread port, meter-in (B) control, and a 360-degree swivelling tube nut. The -S parts carry the same pressure and temperature ratings as the standard PSS line.
Seal the male 3/8in PT thread with sealant tape wrapped against the rotation direction, and thread it in fully before deciding the tubing direction, because the Dia 10 tube nut swivels 360 degrees to meet the run afterwards. Use soft nylon or polyurethane tubing only, push it in fully and pull-test it. Note that AirTAC publishes flow for this controller as a characteristic curve only, so verify capacity by curve rather than expecting a single flow figure.
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