Airtac PTL Exhaust Throttle Type Speed Control Valve PTL6M5B-M
The AirTAC Airtac PTL Exhaust Throttle Type Speed Control Valve PTL6M5B-M 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 PTL6M5B-M
The PTL6M5B-M is the mini push-lock speed controller from AirTAC: Dia 6 tubing on one side, an M5 thread on the other, in the compact -M body size that only exists in Dia 4 and Dia 6 with M5 or 1/8 threads. It throttles air in one direction and passes it freely in the other, so you set the speed of an actuator while the return stroke stays unrestricted. This code carries the B suffix, which is meter-in: flow from the tube side back to the thread port is throttled, while flow from the thread port into the tube runs free. In practice that suits a single-acting cylinder, where controlling the supply of air gives a smooth, controlled stroke; AirTAC's own guidance notes meter-out is the first priority for double-acting cylinders driven by a solenoid valve.
Instead of a knob there is a POM push-lock cap: press it, the adjustment releases, release it and the setting is held. That cap is also why AirTAC publishes one of the very few torque figures in this catalogue, 0.05 N.m for the M5 push-lock cap. The throttling body is brass with a brass or aluminium-alloy throttling column inside, and the standard finish is grey. Air enters through the M5 thread, which seals on its tapered PT form, and tubing must be soft nylon or polyurethane.
Airtac PTL Exhaust Throttle Type Speed Control Valve PTL6M5B-M Technical Specifications
| Model | Airtac PTL Exhaust Throttle Type Speed Control Valve PTL6M5B-M |
|---|---|
| Type | Push-lock speed controller, threaded elbow |
| Series | PTL |
| Adjustment | Push-lock adjusting cap (POM) |
| Orientation | Fixed tube direction |
| 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. 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 PTL6M5B-M
| 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. |
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 PTL6M5B-M Is Used
Spring-return clamping jig
A single-acting clamp that closes onto a machined face needs its approach slowed. Meter-in control on the Dia 6 supply line at the clamp port gives a gentle close, and the push-lock cap stops the setting drifting on a vibrating fixture.
Mini marking or stamping head
On small marking rams fed from an M5 port, the mini body clears tight tooling where a full-size controller will not fit, and meter-in throttling keeps the strike consistent from cycle to cycle.
Bench-top dispensing probe
A lab or electronics bench probe driven by a small single-acting cylinder benefits from free flow into the tube and throttled exhaust back through the M5 thread, giving a repeatable dip-and-return motion without electronics.
Is the Airtac PTL Exhaust Throttle Type Speed Control Valve PTL6M5B-M the Right Part?
Choose meter-in (B) when your actuator is single-acting, such as a spring-return clamp or ram; meter-in on a double-acting cylinder under varying load tends to stick-slip. Choose the push-lock PTL over a knurled PSL where the setting must survive vibration or a passing operator, and over the screwdriver-set types where you want tool-free adjustment. Sizing: one step down is the PTL4M5B-M with Dia 4 tube, which suits lighter single-acting pilot devices; there is no larger tube at M5. Dia 8 exists on this prefix only with a 1/8 thread, so stepping up in bore also steps up the port. Fit the controller directly at the cylinder port so the small volume between throttle and piston keeps the response 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 PTL6M5B-M FAQ
It is a mini push-lock speed controller for Dia 6 tube with an M5 thread, meter-in (B) control. Working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum to -750 mmHg (10 Torr), proof pressure 1.5 MPa, operating temperature -20 to +70 C. Tubing must be soft nylon or polyurethane, the standard colour is grey, and the M5 push-lock cap torque is 0.05 N.m.
Press the POM push-lock cap to free the adjustment, turn it to set the speed, and release the cap to lock. The push-lock design resists being knocked out of adjustment far better than a plain knob, which is why it is preferred on vibrating machines. If you need to isolate a circuit, this is the wrong part: a speed controller leaks slightly when fully closed, and only the PHV finger valve is a true shut-off.
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