Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1002A-S
SUS304 stainless variant (-S)The AirTAC Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1002A-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 PSS1002A-S
The PSS1002A-S is the SUS304 stainless build of AirTAC's universal speed controller for Dia 10 mm soft nylon or polyurethane tubing on a 1/4 in PT thread. The A suffix means meter-out: air passing from the 1/4 in thread port out to the tube is throttled, while flow in the reverse direction runs free. AirTAC treats meter-out as the first-priority control method because throttling a double-acting cylinder's exhaust traps a back-pressure cushion that keeps the stroke smooth instead of stick-slipping under a changing load.
Where the PSL holds its tube in one fixed direction, the PSS swivels the tube fitting a full 360 degrees, so you can clock the outlet to any angle after the body is threaded in - a real time-saver in crowded manifold work. Adjustment is a knob under an aluminium locking cap: set the speed, then screw the cap down so vibration cannot walk the setting off. The -S suffix swaps the brass throttling column for SUS304, and all ratings are unchanged: 0-1.0 MPa working pressure, -750 mmHg vacuum, 1.5 MPa proof pressure, -20 to +70 C.
Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1002A-S Technical Specifications
| Model | Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1002A-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 PSS1002A-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 PSS1002A-S Is Used
Dairy bottle-rinse clamp cylinders
On a caustic wash-down bottle line, Dia 10 tubing feeds 50-63 mm clamp cylinders that lower guide rails onto glass gently. The SUS304 throttling column survives repeated caustic spray where a brass column would dull and corrode.
Wave-solder pallet lift
Electronics flux environments are hostile to copper alloys, so the copper-free SUS304 column is the right pick for lifting solder pallets on Dia 10 lines, with the A meter-out throttling holding the lift from slamming down onto the rail stop.
Marine hatch hold-down actuator
A deck hatch pusher on a workboat breathes salt-laden air all season. The 1/4 in PT thread seats into the hatch cylinder head and the swivel outlet lets the Dia 10 hose route around the hinge without twisting as the hatch opens.
Is the Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1002A-S the Right Part?
At a 1/4 in thread, Dia 10 sits at the top of the PSS ladder - there is no larger tube on this thread. Step down to Dia 8 (PSS802A-S) if your actuator port or existing tubing is 8 mm; the narrower bore means less air per stroke, so a given knob setting has finer effect but lower capacity. To go bigger you must change thread as well, to 3/8 in with Dia 10 (PSS1003A-S) or Dia 12 (PSS1203A-S). Whichever size you pick, fit the controller directly in the cylinder port so the throttled volume stays small and the response stays crisp.
Choose the knob-style PSS over the push-lock PTL types when you want fast hand adjustment during commissioning; the locking cap then holds the setting through vibration. The 360 degree swivel also removes the tubing twist that a fixed PSL can introduce on a rotating or pivoting bracket.
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 PSS1002A-S FAQ
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. It takes Dia 10 mm soft nylon or polyurethane tubing on a 1/4 in PT thread, and it is the A meter-out version, marked A on the handle. The -S build uses an SUS304 throttling column in place of brass.
No. AirTAC publishes one rating set for both: the stainless part keeps 0-1.0 MPa working pressure, 1.5 MPa proof pressure and -20 to +70 C, and the dimension tables match the standard part. What changes is material: SUS304 throttling column instead of brass, a stainless spring gasket, and a body in aluminium alloy or SUS304 depending on the part. AirTAC publishes no surface finish figure, passivation spec or food or medical certification for it, so request any such documents through us before you specify.
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