Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004AD
The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004AD 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 PTL1004AD
The PTL1004AD is a push-lock speed controller that throttles air in one direction and lets it run free in the other, so you set how fast an actuator moves instead of watching it slam into position. This is the A code, AirTAC's meter-out arrangement: flow from the 1/2in thread port to the Dia 10 tube is controlled, and the return path runs unrestricted. Meter-out is AirTAC's stated first priority because a solenoid valve driving a double-acting cylinder keeps back-pressure on the exhaust side, which cushions the stroke and prevents stick-slip as the load changes.
The black D-suffix body carries a POM push-lock cap instead of a screwdriver knob: press the cap to release the needle, turn to set, let go and the cap locks the setting in place, so machine vibration and incidental contact will not walk your adjustment off. Throttling internals are a brass body with a brass or aluminium-alloy column, and the 1/2in push-lock cap should be tightened to a maximum of 0.32 N.m when fitting. The tube direction is fixed on this shape; the swivelling version of the same valve is the PTS.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004AD Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004AD |
|---|---|
| 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 PTL1004AD
| 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 PTL1004AD Is Used
Palletiser clamp head
A palletiser's push clamp lowering onto a stack of shrink-wrapped cartons needs a firm but non-crushing approach speed. A Dia 10 line with 1/2in ports carries the volume a full-width clamp cylinder breathes, and meter-out exhaust control keeps the descent even even as the clamp meets the load.
CNC tool-change arm
On a CNC machining centre, the tool-change arm's rotary and extend cylinders must arrive at each station without shock or the cutter chips up. Meter-out throttling at the cylinder port cushions the last part of every stroke, and the push-lock cap holds the timing through thousands of cycles.
Case indexing pusher
An indexing pusher that nudges corrugated cases across a conveyor onto a transfer plate is timed against belt speed. The A code throttles the push stroke from the 1/2in supply port while the return runs free, so the pusher retracts fast and advances at exactly the pace the case sensor expects.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004AD the Right Part?
Decide by actuator type first. Driving a double-acting cylinder, a gripper or a slide table through a solenoid valve? Stay with this meter-out A code. Driving a single-acting cylinder (spring-return, one air line)? Take the meter-in B code instead, PTL1004BD, because throttling the supply gives the smoother result there. Meter-in control on a double-acting cylinder tends to hunt and judder under a varying load.
Size both ways from Dia 10. One step down on the 1/2in ladder is Dia 8, one step up is Dia 12 - the tube bore sets the physical air capacity AirTAC publishes as a curve, so stepping down trims flow headroom and stepping up adds it. If your port is actually 3/8in, Dia 10 also exists on that thread as PTL1003AD. Fit the controller directly at the cylinder port rather than back at the valve manifold: the throttled air volume stays small, and small volumes respond cleanly to fine adjustment.
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 PTL1004AD FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), usable under vacuum to -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 10 soft nylon or polyurethane tubing on a 1/2in PT thread, meter-out (A) control, black D-suffix body. It suits AirTAC's standard PT thread porting.
Push the POM cap down to free the needle, turn it to the stroke speed you want, then release - the cap springs back and locks the setting against vibration. When installing the valve into a 1/2in port, tighten the cap to at most 0.32 N.m, the published figure for this thread size; overtightening risks distorting the cap. Note the A marking on the handle: that side is the controlled (meter-out) direction. This valve is a flow control, not a shut-off - to isolate a circuit use a dedicated valve such as the PHV.
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