Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802A
The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802A is a genuine push-lock speed controller, threaded elbow with push-lock adjusting cap (pom) and fixed tube direction, used to set the speed of a pneumatic cylinder by throttling its air.
- TypePush-lock speed controller, threaded elbow
- SeriesPTL
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- AdjustmentPush-lock adjusting cap (POM)
- 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 PTL Exhaust Throttle Type Speed Control Valve PTL802A
The PTL802A is a push-lock speed controller that throttles air flowing from its 1/4in PT thread port out to a Dia 8 one-touch tube, while letting the return flow pass through unrestricted. That makes it a meter-out controller, code suffix A: AirTAC's first-choice arrangement, because on a solenoid-valve-driven double-acting cylinder the throttled exhaust builds a back-pressure cushion that keeps the stroke smooth instead of letting the load lurch ahead on the slack side of the piston.
Where the PSL uses a knob, this push-lock body takes a pressed cap: push the cap to unlock, set the flow, release, and the cap locks the throttling column where you left it. AirTAC publishes a cap torque for this family - 0.16 N.m at the 1/4in size - so seating the tube is a defined operation, not guesswork. Internally you get a POM adjusting cap, a brass throttling body and a brass or aluminium-alloy column, with grey as standard.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802A Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802A |
|---|---|
| Type | Push-lock speed controller, threaded elbow |
| Series | PTL |
| Adjustment | Push-lock adjusting cap (POM) |
| 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 PTL Exhaust Throttle Type Speed Control Valve PTL802A
| PTL | Push-lock 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 PTL Exhaust Throttle Type Speed Control Valve PTL802A Is Used
Palletising pusher timing
A Dia 8 exhaust circuit on a palletiser pusher that must present cartons onto the layer pattern at a fixed beat. Meter-out control keeps the push velocity constant regardless of how many boxes are stacked against it.
Packaging sealing jaws
A horizontal form-fill-seal machine where the crimp jaws close gently onto film. The push-lock cap survives the machine's vibration and daily wash-downs of set-drifting knobs on neighbouring stations.
Indexing lift table descent
A lift-and-locate unit on an assembly line lowering parts onto pins. Throttling the outlet port gives a controlled descent speed, while the free inbound flow lets the raise stroke stay at full plant pressure.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802A the Right Part?
Step down to the PTL602A if your run is Dia 6 tube - a smaller bore suits light loads on short cylinders and gives finer low-speed control, but it will choke a bigger actuator. Step up to the PTL1002A for Dia 10 lines feeding heavy slides or long-stroke cylinders, where the larger bore keeps free-flow losses down. If it is the thread rather than the tube you want to change, the Dia 8 tube also exists on the PTL801A with a 1/8in port. Whichever size you land on, mount the controller directly at the cylinder port so only the short stub between controller and cylinder is throttled - the actuator then responds to a small, fast-changing air volume and speed setting tracks cleanly.
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 PTL Exhaust Throttle Type Speed Control Valve PTL802A FAQ
The PTL802A takes Dia 8 one-touch tube on a 1/4in PT thread and works at 0-1.0 MPa (0-10 kgf/cm2), with negative pressure to -750 mmHg (10 Torr) and a proof pressure of 1.5 MPa. Temperature range is -20 to +70 C, and it is intended for soft nylon or polyurethane tubing. Its A suffix means meter-out: flow from the thread port to the tube is controlled, the reverse direction runs free.
The push-lock cap is pushed to release the adjustment, set, and released to lock - so it resists being knocked out of setting by vibration or an operator's sleeve, at the cost of being slightly slower to tweak than a bare knob. AirTAC publishes a cap torque for the PTL family, and for this 1/4in size it is 0.16 N.m. Note that like any speed controller, the PTL802A leaks slightly when fully closed - it is not a shut-off valve; use a PHV finger valve where you need positive isolation.
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