Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-M
The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-M 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 PTL601AD-M
The PTL601AD-M is a compact pneumatic speed controller that throttles air in one direction and passes it freely in the other, so an actuator can be slowed without losing force. This code is the A variant, meter-out: flow from the 1/8" PT thread port to the Dia 6 tube is controlled, while the return path runs unrestricted. AirTAC rates meter-out as the first-choice method, because throttling the exhaust of a double-acting cylinder builds a back-pressure cushion that keeps the stroke smooth even under a varying load. The handle carries the letter A so the controlled direction is visible on the machine.
The -M marks the mini series, sized for Dia 4 and Dia 6 tubing on M5 or 1/8" threads, so this is one of the smallest push-lock controllers in the range. Instead of an open knob it uses a push-lock cap: press the cap to release it, set the flow, then press again to lock the setting in place. The D suffix means the body is the black colour option rather than standard grey.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-M Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-M |
|---|---|
| Type | Push-lock speed controller, threaded elbow |
| Series | PTL |
| Adjustment | Push-lock adjusting cap (POM) |
| Orientation | Fixed tube direction |
| Size class | Mini series (-M) |
| 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 PTL601AD-M
| 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. |
| -M | Mini series. |
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 PTL601AD-M Is Used
Miniature gripper on a benchtop pick-and-place
A compact parallel gripper fed by Dia 6 tubing slams shut and marks the workpiece. Meter-out throttling at the cylinder port cushions the close, and the push-lock cap keeps the setting safe from an operator brushing past.
Syringe stopper press on a lab filling line
A small single-action press must seat rubber stoppers gently into glass vials. The 1/8" PT thread mounts straight into the manifold port, and the lockable cap holds the delicate speed once validated.
Reject pusher on a compact checkweigher
Dia 6 cylinders kick off-spec packages from a narrow conveyor. The mini body fits the tight frame, and meter-out control times each reject stroke to the passing product without re-tuning after every shift.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-M the Right Part?
Choose meter-out (A) for a double-acting cylinder driven by a solenoid valve; the exhaust-side throttle gives a damped, stick-slip-free stroke. Meter-in (B) is better matched to single-acting cylinders. If a cleaner or plating line will not accept brass, look at the SUS304 -MS version instead, which keeps identical ratings and dimensions.
For sizing, this sits mid-ladder on a 1/8" thread: one step down is the Dia 4 mini, which only exists in this mini series and suits very short, low-volume runs where response must be immediate; one step up is the Dia 8 PTL, which carries more flow for longer or faster strokes but is physically larger. Whatever you pick, install the controller directly at the cylinder port so the throttled air volume stays as small as possible - that is what makes fine speed adjustment possible. If you would rather adjust by hand quickly and often, the knobbled PSL trades the tamper resistance of this push-lock cap for faster setting.
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 PTL601AD-M FAQ
Tube size Dia 6 mm, thread 1/8" PT, control method meter-out (A), black body, push-lock adjustment, mini series. Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa, operating temperature -20 to +70 C. Use soft nylon or polyurethane tubing. The push-lock cap on a 1/8" thread should be torqued to 0.08 N.m when a fitting is secured through it.
Functionally it is the same PSL shape with the same A/B metering logic, but the adjustment is recessed under a cap: press to unlock, turn to set, press to lock. That stops vibration or incidental contact from changing a validated speed setting. A knob-type PSL is faster to adjust by hand but offers no such protection, so push-lock suits machines where the setting is rarely touched.
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