Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-MS
SUS304 stainless variant (-S)The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-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 PTL601AD-MS
The PTL601AD-MS is a SUS304 push-lock speed controller for a Dia 6 soft nylon or polyurethane tube on a 1/8in PT port. It throttles air flowing from the thread port out to the tube and lets the return flow pass freely, and the A suffix confirms meter-out control marked on the body. Meter-out is AirTAC's default recommendation: with a solenoid valve driving a double-acting cylinder, throttling the exhaust builds a back-pressure cushion that keeps the stroke smooth instead of lunging and sticking. The push-lock cap replaces the usual knurled knob, so the setting cannot drift when the machine vibrates or a hand brushes past.
This -MS mini variant replaces the brass throttling column with SUS304 stainless steel, and the spring gasket is stainless too, giving a copper-free flow path for plating tanks, electronics assembly and other processes where brass contact is unwanted. It is finished in black (the D suffix) rather than the standard grey. Set-up is by pressing and twisting the cap, and the published cap tightening torque for the 1/8in size is 0.08 N.m. Ratings are unchanged from the standard line: 0-1.0 MPa working, 1.5 MPa proof, -20 to +70 C, -750 mmHg vacuum.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-MS Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-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 PTL601AD-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 PTL601AD-MS Is Used
Electroplating line transfer gate
A lifting gate over a nickel plating tank cycles in acid mist all shift. The SUS304 flow path and copper-free black body resist the environment, and the push-lock cap holds the descent speed setting despite constant wash-down handling.
PCB handling pick-and-place gantry
A small double-acting cylinder lowers a vacuum head onto a circuit board. Meter-out throttling cushions the down-stroke so boards are not jarred, and the brass-free internals suit the flux and cleaning chemistries on the line.
Vial capping press in a pharmaceutical filling suite
The capping ram must close gently onto glass vials. The Dia 6 bore matched to a compact head cylinder gives fine control of a short stroke, and the locking push-lock cap keeps the validated speed through repeated changeovers.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL601AD-MS the Right Part?
Pick meter-out (this A code) for a double-acting cylinder driven by a solenoid valve - the cushioned exhaust is what stops stick-slip under a changing load. Choose meter-in (the B code in the same size) only when the actuator is single-acting, for example a spring-return clamp. Among push-lock bodies, this fixed-thread PTL shape suits a controller screwed straight into the cylinder port; if you need the tube side to rotate, the PTS universal is the swivel version, and the PTA is the inline tube-to-tube option.
Sizing either way on the 1/8in push-lock ladder: the Dia 6 bore here is the smaller of the two 1/8in options, with the Dia 8 PTL801A as the step up when a bigger actuator needs more free-flow area. On the mini ladder one step down, Dia 4 exists only with an M5 thread, so the Dia 6 / 1/8in combination in this code is the practical crossover size. Mount the controller directly at the cylinder port so the throttled air volume stays as small as possible and 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 PTL601AD-MS FAQ
It is a SUS304 push-lock speed controller, meter-out (A), for Dia 6 mm soft nylon or polyurethane tubing on a 1/8in PT thread, finished black. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa, and the temperature range is -20 to +70 C. The published tightening torque for the 1/8in push-lock cap is 0.08 N.m.
Press the push-lock cap down and turn it to change the throttle, then release - the cap locks in position and resists vibration far better than a plain knob, which is why it suits machines with frequent wash-down or operator contact. The manufacturer specifies 0.08 N.m as the tightening torque for the 1/8in cap. Note that like any speed controller it is not a shut-off valve: fully closed it still passes a trace of air, so use a separate valve to isolate the circuit.
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