Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B
The AirTAC Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B 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
The PSS1003B is a universal speed controller that sets actuator speed by throttling air in one direction while letting it pass freely the other way. The B suffix marks it as meter-in: flow from the 3/8in PT thread port into the Dia 10 tube runs free, and the return flow out of the actuator is throttled. AirTAC's catalogue guidance treats meter-out as the first choice for a solenoid valve driving a double-acting cylinder, because throttling the exhaust builds a back-pressure cushion that keeps the stroke smooth. Meter-in like this code is the match for a single-acting cylinder, where there is no exhaust cushion to work with.
The body is the PSS universal form: unlike the fixed PSL, the tube connection swivels a full 360 degrees, so you can screw the thread into a port and then rotate the push-in fitting to face the tubing run however the machine frame demands. Adjustment is by a knurled knob with an aluminium locking cap; tighten the cap after setting and the throttle position will not walk. Internal wetted materials include a brass throttling column and body with a PBT holder and NBR O-ring, and the fittings accept soft nylon or polyurethane tubing of 10mm outside diameter.
Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B Technical Specifications
| Model | Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B |
|---|---|
| Type | Universal speed controller |
| Series | PSS |
| Adjustment | Knob with aluminium-alloy locking cap |
| Orientation | 360 degree adjustable 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B
| 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. |
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 Is Used
Clamp cylinder on a fixture
A spring-return clamp closing onto machined aluminium extrusions needs a controlled closing stroke, not a slam. The meter-in control of the PSS1003B meters the supply side, which is the correct method for a single-acting clamp, and the Dia 10 bore carries the volume a 3/8in-port fixture cylinder demands.
Indexing pusher on a packaging line
A pusher that kicks cartons across a conveyor must complete its stroke inside a fixed takt time. Fitting the PSS1003B at the cylinder port and timing the knob against a counter lets a technician retune the push without touching the PLC, and the swivelling tube fitting clears guard brackets on the machine frame.
Dosing head on a filling station
A single-acting dosing cylinder that must extend gently onto a filled vial benefits from meter-in throttling: the return spring drives the retract at full speed while the controlled supply side sets a soft approach. The locking cap holds the setting once the fill profile is signed off.
Is the Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS1003B the Right Part?
Check your actuator before choosing the B version. A single-acting or spring-return cylinder is well served by meter-in control like the PSS1003B; a double-acting cylinder under a changing load is better served by the meter-out PSS1003A, since meter-in on a double-acting circuit tends to stick-slip. Size-wise, the PSS ladder at the 3/8in thread offers only Dia 10 and Dia 12, so this Dia 10 is the smallest tube you can put on a 3/8in PSS; the step up to PSS1203 buys a larger bore and more free-flow area for longer tubing runs. If your tube is smaller, drop the thread to 1/4in, where PSS1002 keeps the same Dia 10 tube on a 1/4in port.
Fit the controller directly at the cylinder port rather than back at the valve manifold. Throttling at the port keeps the small compressed volume under control and gives crisper response than throttling a long tube run. If you would rather a fitting that cannot be knocked out of adjustment, look at the push-lock PTS range; the PSS knob is faster to dial in by hand on a running machine.
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 FAQ
Working pressure is 0-1.0 MPa (0-10 kgf/cm2), proof pressure is 1.5 MPa, and it will hold vacuum to -750 mmHg (10 Torr). The ambient and media temperature range is -20 to +70 C. This code is the universal body with a Dia 10mm push-in tube connection on a 3/8in PT male thread, marked B for meter-in control. It is rated for soft nylon or polyurethane tubing.
Usually no. AirTAC's own guidance says meter-out is the first priority: on a double-acting cylinder, throttling the exhaust (meter-out) creates a back-pressure cushion that stops the piston racing ahead of its air supply under a varying load. Meter-in, which is what the PSS1003B does, is intended for single-acting and spring-return cylinders. For a double-acting circuit on the same port, order the meter-out PSS1003A instead - same body, same sizes, opposite control direction.
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