Airtac PTL Exhaust Throttle Type Speed Control Valve PTL401A-MS
SUS304 stainless variant (-S)The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL401A-MS 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 PTL401A-MS
The PTL401A-MS is the compact stainless member of AirTAC's push-lock speed controller family. It throttles air flowing from the 1/8in PT thread port out to the Dia 4 tube while letting the return air pass through unrestricted, which is the meter-out (A) arrangement. AirTAC treats meter-out as the default choice: on a double-acting cylinder the throttled exhaust builds a back-pressure cushion, so the stroke stays smooth instead of stick-slipping. The cap is marked A so the setting direction is obvious on a crowded manifold.
Instead of a knob, the mini PTL uses a push-lock cap - press to release, pull to re-tune, and the cap resists being backed off by vibration or a stray hand. For this code the brass throttling column of the standard part is replaced with SUS304 stainless, with the body in aluminium alloy or stainless depending on the part, trimming the copper content for wash-down and sensitive-process environments. The 1/8in PT male thread seals with sealant tape into the cylinder port or fitting. Soft nylon or polyurethane tubing only - the Dia 4 bore is not designed for rigid PA tube.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL401A-MS Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL401A-MS |
|---|---|
| Type | Push-lock speed controller, threaded elbow |
| Series | PTL |
| Adjustment | Push-lock adjusting cap (POM) |
| Orientation | Fixed tube direction |
| Body material | Stainless steel 304 (-S variant) |
| 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. 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 PTL Exhaust Throttle Type Speed Control Valve PTL401A-MS
| 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. |
| -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 PTL Exhaust Throttle Type Speed Control Valve PTL401A-MS Is Used
Reagent dispenser cylinders
The Dia 4 bore and 1/8in port suit the small aspirating or dispensing cylinders on laboratory reagent stations, where the SUS304 throttling column limits copper contact with the sample path and the push-lock cap keeps the dispense stroke speed fixed after calibration.
SMT pick-and-place heads
On an SMT placement machine the vacuum gripper head must descend gently onto a bare PCB. Meter-out throttling of the descent cushion the stroke, and the mini stainless body fits the tight head assembly where a standard PSL will not.
Plating-line micro pushers
A compact cylinder that indexes small racks on an electroplating line sees corrosive mist all day. The stainless-trimmed push-lock body and PT thread hold speed setting on the transfer stroke while the plated work keeps its finish intact.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL401A-MS the Right Part?
Check the actuator first. Meter-out (A) suits a solenoid valve driving a double-acting cylinder; if yours is single-acting, a meter-in B code holds the stroke better, and meter-in on a double-acting cylinder tends to crawl under varying load. Push-lock versus knob is a choice about adjustment stability: the push-lock cap survives vibration and accidental contact, while a knobbed PSL is faster to twist during commissioning. On space, this is the smallest part AirTAC makes in the mini push-lock line - Dia 4 is the bottom of the mini ladder, and the only step up is the PTL601A-MS with its Dia 6 bore, which passes noticeably more free-flow air per stroke. Once panel space allows, the standard-line PTL601A at the same 1/8in thread opens up the full Dia 6 to 12 range. Mount the controller directly at the cylinder port so the throttled air volume stays small and the response stays crisp.
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 PTL401A-MS FAQ
It is a push-lock speed controller in the mini SUS304 series, with meter-out (A) flow control, a Dia 4 tube connection and a 1/8in PT male thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), proof pressure is 1.5 MPa, it tolerates vacuum down to -750 mmHg (10 Torr), and the operating temperature range is -20 to +70 C. AirTAC publishes flow as a characteristic curve only, so capacity should be judged by the Dia 4 bore, not by a quoted figure.
Pull the cap up to unlock, turn it to throttle the thread-to-tube direction, then push it back down so the setting locks against vibration. AirTAC specifies a tightening torque of 0.08 N.m for the 1/8in push-lock cap - do not overtighten it. Use soft nylon or polyurethane tubing on the Dia 4 barb; rigid PA tube will not seal correctly on this bore.
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 PTL Exhaust Throttle Type Speed Control Valve PTL401A-MS
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.