Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802BD
The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802BD 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 PTL802BD
The PTL802BD is a push-lock speed controller in the black colour option: it screws into a 1/4in PT port and takes Dia 8 soft nylon or polyurethane tubing from its one-touch socket. It throttles air in one direction to set actuator speed and lets air pass freely the other way. This is the B, meter-in, version - flow from the 1/4in thread port into the tube runs unthrottled, and the return flow is choked. The handle is marked B so circuit documentation and the machine itself stay in agreement. Meter-in is the match for single-acting cylinders, where the controlled fill rate gives a smooth, timed stroke without fighting a return spring.
Instead of a screwdriver-adjusted knob, this body carries a push-lock cap: press it to release the tube, and the adjustment stays where you leave it once set. AirTAC publishes a seating torque for this cap - 0.16 N.m at the 1/4in size - so the cap can be tightened by feel or with a small torque tool without damaging the POM adjusting cap or the brass throttling body underneath. The suffix D changes the colour to black only; every rating and dimension is identical to the grey standard part.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802BD Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802BD |
|---|---|
| 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 PTL802BD
| 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 PTL802BD Is Used
Carton-closing clamp
A single-acting spring-return clamp on a case-packing head eases its rubber pad down onto printed cartons at a set fill rate, so the box face is never scuffed by a fast slam.
Mould part ejection
A single-acting kicker cylinder ejects formed plastic parts off a shallow mould; the meter-in setting is trimmed until the push is firm but does not flip the part across the bench.
Test-rig loading arm
A bench fixture loads parts into a leak-test nest under controlled single-acting thrust; the push-lock cap keeps technicians from nudging the setting between changeovers.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802BD the Right Part?
Pick meter-in (this B code) for a single-acting, spring-return cylinder; for a double-acting cylinder driven by a solenoid valve, AirTAC's own guidance puts meter-out first because throttled exhaust builds a back-pressure cushion and the stroke avoids stick-slip under changing load - order the A version of the same body for that. Size-wise the 1/4in thread ladder runs Dia 6, Dia 8 and Dia 10, so the step down is PTL602BD/PTL602B for lighter lines and the step up is PTL102B for Dia 10 tubing. For the same Dia 8 tube on a different port, the 1/8in thread exists (PTL801B) and so does 3/8in (PTL803B). Fit the controller at the cylinder port, not back at the valve: the volume of air being throttled shrinks and speed response to adjustment gets far finer.
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 PTL802BD FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, negative pressure -750 mmHg (10 Torr), operating temperature -20 to +70 C. The connection is a 1/4in PT thread with a Dia 8 one-touch socket for soft nylon or polyurethane tubing, in the black colour option. Flow capacity is published as a characteristic curve rather than a single flow figure.
The trailing B in the code fixes the control direction: thread-to-tube flow is free and tube-to-thread flow is throttled, which is the recommended setup for single-acting cylinders. There is no field adjustment to flip it - meter-out for a double-acting cylinder is a different order code (PTL802BD's A counterpart). If you do change the code, remember the black D suffix only changes colour and carries no rating difference.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard parts are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Speed Controllers
Request a Quote for Airtac PTL Exhaust Throttle Type Speed Control Valve PTL802BD
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.