Airtac PTL Exhaust Throttle Type Speed Control Valve PTL602AD-S
SUS304 stainless variant (-S)The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL602AD-S 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 PTL602AD-S
The PTL602AD-S is a meter-out speed controller in AirTAC's push-lock family, built as the SUS304 stainless-trim version of the PTL602AD. It throttles air flowing from the 1/4in PT thread port out to the Dia 6 push-in tube, while air travelling the opposite way passes through unrestricted. That meter-out behaviour is AirTAC's default recommendation: on a solenoid-valve circuit driving a double-acting cylinder, throttling the exhaust leaves a back-pressure cushion so the stroke stays smooth instead of stick-slipping under a shifting load. The handle carries the A marking so circuit builders can confirm the controlled direction on the machine.
Instead of a knob, this version uses a push-lock adjusting cap: press it in to release, set the orifice, press again to lock. The cap resists being backed off by machine vibration or a brushed elbow, which is why it suits gates and clamps that run for months without retuning. The D suffix in the code is the black colour option. The -S build swaps the brass throttling column for SUS304 stainless, giving copper-free construction and better corrosion resistance in wash-down, marine and plating environments - with ratings and dimensions identical to the standard part.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL602AD-S Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL602AD-S |
|---|---|
| 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) |
| 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 PTL602AD-S
| 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. |
| -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 PTL602AD-S Is Used
Wash-down gate on a food tray line
The SUS304 throttling column and copper-free build handle daily hose-down and caustic rinse on a dairy or poultry tray-sealing gate, while the push-lock cap keeps the gentle-close setting locked despite repeated steam and vibration.
Electronics pick-and-place Z-axis
On an SMT feeder or PCB handling arm, copper-free stainless construction avoids contamination near sensitive assembly, and meter-out control lets a light Dia 6 circuit lower the head onto components without bounce.
Plating-line indexing pusher
A rack-transfer pusher on an electroplating line cycles in acid mist around the tanks; the stainless trim resists the atmosphere and the A suffix guarantees the push stroke is the throttled, speed-controlled direction.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL602AD-S the Right Part?
Meter-out (this A code) is the first choice for double-acting cylinders fed from a solenoid valve; choose a B meter-in code only for single-acting actuators. Push-lock suits positions where an operator or vibration could disturb a plain knob; if you need frequent hand adjustment during commissioning, the knob-type PSL family is faster to turn. This is the fixed-body PTL shape - thread into the port, tube out in one direction. If the tubing has to swivel as the actuator moves, step across to the PTS universal body instead, and if you need tube-to-tube inline control with no port thread, the PTA straight type covers Dia 6 too.
Sizing: on a 1/4in PT thread, Dia 6 is the smallest tube PTL offers - there is no smaller sibling on this thread, and the next step up is PTL802A (Dia 8). Dropping to the 1/8in thread keeps Dia 6 available in a more compact port. Whatever you choose, fit the controller directly at the cylinder port so the throttled air volume stays small and response stays crisp. Note the published push-lock cap torque for 1/4in is 0.16 N.m, and remember a speed controller is not a shut-off valve - it weeps slightly fully closed; use an AirTAC PHV finger valve where you need positive isolation.
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 PTL602AD-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa, ambient and media temperature -20 to +70 C. This SKU is a push-lock speed controller for Dia 6 tube on a 1/4in PT thread, meter-out (A) control, black (D) push-lock cap, with SUS304 stainless throttling column in place of brass. It runs on soft nylon or polyurethane tubing. Flow is published by AirTAC as a characteristic curve only, not a Cv value.
AirTAC publishes a cap torque of 0.16 N.m for the 1/4in push-lock size - snug by hand with a small tool, not wrench-tight, so the POM cap is not crushed. And no: a push-lock speed controller is not a shut-off valve. It is designed to leak slightly when fully closed, so it must not be relied on to isolate a circuit. For positive isolation use the AirTAC PHV finger valve, which is a true quarter-turn shut-off.
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