Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD-S
SUS304 stainless variant (-S)The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD-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 PTL1004BD-S
The PTL1004BD-S is a meter-in speed controller in the SUS304 stainless variant, sized for Dia 10 soft nylon or polyurethane tubing on a 1/2in PT thread. With the B code, air flowing from the thread port into the tube runs free, while the return path from tube back to thread is throttled. That controlled return is what meters air INTO the actuator, so this code is the natural pick for single-acting cylinders, where pushing the piston against a spring too hard causes juddering starts. On a double-acting cylinder, AirTAC recommends meter-out instead, because meter-in under a shifting load tends to stick-slip.
Adjustment is by push-lock cap: press to release, slide to the setting, release to lock. Because there is no protruding knob, the cap is far less likely to be knocked out of position inside a guard or alongside conveyor structure. The -S suffix swaps the brass throttling column for SUS304 and pairs it with an aluminium alloy or SUS304 throttling body and stainless spring gasket, which is why this part suits copper-free cells in electronics assembly, plating shops and wash-down food lines. The D suffix means the body is black rather than the standard grey.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD-S Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD-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 PTL1004BD-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 PTL1004BD-S Is Used
Wash-down packaging clamps
A single-acting spring-return clamp closing a lid press on a dairy or meat packaging line is rinsed down daily. The SUS304 column resists the wash chemistry and the meter-in action eases the clamp onto the pack instead of slamming it.
Plating line transfer pushers
On an electroplating transfer rail, copper-alloy parts shed contamination into acid baths. A copper-free stainless trim plus Dia 10 bore gives the push cylinder a smooth, timed advance between dip stations.
SMD magazine indexing
An SMT line's PCB magazine lift cylinder needs a gentle set-down so boards do not bounce in the rack. Meter-in throttling on the return port gives a controlled descent, and the push-lock cap survives vibration beside the conveyor.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL1004BD-S the Right Part?
Match the control letter to the actuator before anything else: B meter-in here suits a single-acting cylinder or any circuit where you want the supply side restricted. If your actuator is double-acting, the same body exists as PTL1004A-S in meter-out form, which is AirTAC's stated first choice. On size, this Dia 10 sits between PTL804B (Dia 8, 1/2in) and PTL1204B (Dia 12, 1/2in) - both exist on the PTL 1/2in ladder. Stepping down eases the controlled flow for a smaller-bore actuator; stepping up suits heavier cylinders where the larger tube bore carries the volume a big piston needs. Capacity itself scales with bore, so let the tube size lead.
Mount the controller directly at the cylinder port so the throttled air volume stays small and the setting responds crisply. When you set the push-lock cap, use the published torque ceiling - 0.32 N.m for the 1/2in size - and do not overtighten, since the cap locks by clamping, not by force. Note this is a flow controller, not a shut-off: for isolating a circuit you need the PHV finger valve.
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-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. It takes Dia 10 soft nylon or polyurethane tubing on a 1/2in PT thread, is a meter-in (B) push-lock speed controller, and the -S suffix puts the throttling column in SUS304 with an aluminium alloy or SUS304 body. The D suffix gives a black body instead of grey.
AirTAC publishes a torque ceiling of 0.32 N.m for the push-lock cap at the 1/2in size; the cap clamps to hold its setting, so tightening harder gains nothing and risks damage. The stainless distinction is specific: -S replaces the brass throttling column with SUS304, giving copper-free construction and better resistance to wash-down, marine and plating environments. Ratings, dimensions and the adjustment mechanism are identical to the standard part - only the trim material changes.
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