Airtac PSL Throttle Speed Control Fitting PSL804AD
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL804AD 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 PSL804AD
The PSL804AD is an AirTAC speed controller with a Dia 8mm one-touch tube port and a 1/2in PT male thread. It sets actuator speed by throttling air in one direction while letting it pass freely the other way. The A suffix makes this a meter-out unit: flow from the 1/2in thread port into the tube is controlled, and the reverse path runs wide open. AirTAC rates meter-out as the first choice because a solenoid valve driving a double-acting cylinder then exhausts against a back-pressure cushion, keeping the stroke smooth instead of stick-slipping when the load shifts.
Adjustment is a knob under an aluminium locking cap - set the speed, tighten the cap, and machine vibration will not drift the setting. The body is PBT plastic over a brass throttling column, and the D suffix supplies the part in black rather than standard grey, with identical dimensions. The 1/2in PT connection is a taper thread, so seal the male thread with tape and leave the tube port sealing to the O-ring.
Airtac PSL Throttle Speed Control Fitting PSL804AD Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL804AD |
|---|---|
| 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 PSL804AD
| 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 PSL804AD Is Used
Clamp head on polished rims
A wheel-polishing cell closes an aluminium clamp onto mirror-finished rims. Meter-out throttling of the extension lets the pad land gently, so no lap marks and no bounce on contact.
Indexing pusher on a carton line
A pusher that clears cartons off a conveyor lane must complete its stroke inside the pitch timing. Meter-out control gives a repeatable push cycle that tracks the conveyor indexer.
Descent speed on a gantry picker
A pick-and-place arm lowering vacuum-gripped glass panels needs a damped descent. Throttling the exhaust of the down stroke cushions the motion so the panel is not jarred at the lay-down point.
Is the Airtac PSL Throttle Speed Control Fitting PSL804AD the Right Part?
Two ladders meet at this code. On the tube side, Dia 8 is the smallest bore AirTAC publishes at 1/2in thread, so the next step up is PSL1004A (Dia 10, same thread) - a bigger bore means less restriction where flow demand is high. On the thread side, step down to PSL803A (3/8in, same Dia 8 tube) if your manifold or cylinder port is 3/8in; only the sealing into the port changes. If the panel is tight around the adjuster, the push-lock PTL804A shares this size but its cap resists being knocked out of adjustment, while the PSL knob is faster to set by hand.
Fit the controller directly at the cylinder port rather than back at the valve. Throttling at the port keeps the controlled volume small, so small knob changes give predictable speed changes.
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 PSL804AD FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa and a temperature range of -20 to +70 C. This code takes Dia 8mm soft nylon or polyurethane tubing on a 1/2in PT male thread, and the black D version carries exactly the same figures as the grey standard.
No. A speed controller throttles but does not seal - even fully closed it is designed to weep slightly, so it must never be trusted to isolate a circuit. In the same AirTAC family the PHV finger valve is the shut-off part; use a proper hand valve for supply isolation.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard parts are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Speed Controllers
Request a Quote for Airtac PSL Throttle Speed Control Fitting PSL804AD
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.