Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD
The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD 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 PTL1004BD
The PTL1004BD is a push-lock speed controller in AirTAC's PTL family: the body shape and fixed tube direction of a PSL, but with a push-lock cap instead of a knurled knob. Push it to unlock and slide it to set, release to lock, and the setting stays where you left it even on machines that shake. This code is Dia 10 tube into a 1/2in PT thread, finished in black (the D suffix), and carries the B control method.
B means meter-in: air flowing from the 1/2in thread port out through the 10mm tube runs free at full bore, while flow in the reverse direction is throttled by the brass needle column, and the handle is marked B so panel builders can verify orientation at a glance. AirTAC's own catalogue names meter-out as the first priority for double-acting cylinders, so choose this meter-in code deliberately - it is the right answer on single-acting or spring-return actuators, where the returning air needs speed control and the supply side does not. Note the tube direction is fixed like a PSL; if you need the fitting to swivel, that is the PTS family. Air flows into soft nylon or polyurethane tubing only.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD |
|---|---|
| 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 PTL1004BD
| 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 PTL1004BD Is Used
Spring-return weld fixture clamps
On an automotive welding fixture, the clamp cylinder extends on plant air and retracts on a spring. Meter-in control in the supply direction sets how fast the clamp jaw travels, and the push-lock cap stops a passing operator's sleeve from disturbing the setting.
Carton kick-off pusher at a conveyor merge
A single-acting pusher that kicks cartons from an infeed lane onto a merging belt needs a repeatable push speed so cartons do not tumble. The Dia 10 bore matches the short 1/2in-port cylinder typical of merge-station pushers.
Pail lid-press head on a dairy capping line
A spring-return lid press lowering onto filled pails must come down gently or it skids the lid. The B meter-in control throttles the press descent, and wash-down areas favour the black PBT body that shrugs off splashed fluids.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD the Right Part?
Sizing at the 1/2in thread level: step down to PTL0804B (Dia 8) for lighter actuators and smaller captured volume, or up to PTL1204B (Dia 12) for large-bore cylinders - both exist in the PTL ladder at 1/2in. If the thread is the constraint rather than the bore, the same Dia 10 tube is available on a 1/4in thread as PTL1002B. Stepping the bore down reduces controlled air volume and lets the needle act on finer speed changes near closed; stepping up suits short, fast strokes of big cylinders.
Meter-in (B) fits single-acting and spring-return actuators; on a double-acting cylinder under varying load it tends to stick-slip, so default to the A version unless your circuit calls for it. Fit the controller directly at the cylinder port so the throttled volume stays small and the setting stays predictable. For releasing the tube, the push-lock cap on this 1/2in size has a published torque of 0.32 N.m - the only torque figure in this family. PT threads are Japanese taper: seal with tape or compound, not with an O-ring.
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 PTL1004BD FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, ambient and media temperature -20 to +70 C. This SKU is the push-lock PTL body with Dia 10 tube, 1/2in PT thread, meter-in (B) control and black (D) finish, for soft nylon or polyurethane tubing.
No. A speed controller is a throttling valve, and by design it leaks slightly when closed fully, so it must never be relied on to isolate a circuit. For a manual shut-off in the same valve family, use the AirTAC PHV finger valve, which is a true quarter-turn shut-off; the PTL1004BD should always have a separate isolation point upstream if the actuator needs to be locked out.
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