Airtac PSL Throttle Speed Control Fitting PSL6M5B
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL6M5B is a genuine speed controller, threaded elbow with knob with aluminium-alloy locking cap and fixed tube direction, used to set the speed of a pneumatic cylinder by throttling its air.
- TypeSpeed controller, threaded elbow
- SeriesPSL
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- AdjustmentKnob with aluminium-alloy locking cap
- 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 PSL Throttle Speed Control Fitting PSL6M5B
The PSL6M5B is an AirTAC in-line speed controller with a Dia 6mm one-touch tube outlet and an M5 male thread. It throttles air in one direction and lets it pass freely in the other, so you can set how fast an actuator runs without plumbing a separate needle valve. The B suffix marks it as meter-in: flow from the M5 thread port into the tube runs free, while air travelling the reverse way is throttled. AirTAC positions meter-in as the choice for single-acting, spring-return cylinders, where the return spring does the exhausting and only the fill speed needs setting.
Adjustment is by a knurled knob under an aluminium locking cap: lift, turn to set, press down to lock. The body is PBT plastic with a brass throttling column, and the grey finish is the standard colour. One detail worth knowing before you buy: the tube outlet on a PSL is fixed and does not swivel like the PSS universal type, so plan the tubing route before tightening the M5 thread.
Airtac PSL Throttle Speed Control Fitting PSL6M5B Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL6M5B |
|---|---|
| Type | Speed controller, threaded elbow |
| Series | PSL |
| Adjustment | Knob with aluminium-alloy locking cap |
| 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 PSL Throttle Speed Control Fitting PSL6M5B
| PSL | 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 PSL Throttle Speed Control Fitting PSL6M5B Is Used
Spring-return probe on a test bench
A single-acting test probe on a benchtop fixture should descend gently onto a PCB rather than drop under its own weight. The PSL6M5B throttles the fill into the small Dia 6 line while the spring handles the return, giving a repeatable contact speed.
Compact gripper on an M5 manifold
Small pick-and-place grippers are often plumbed straight into M5 ports on a valve manifold. Meter-in control on each Dia 6 feed line lets a single-acting gripper close at a set pace onto delicate housings without extra fittings in the cramped manifold space.
Label-head lift on a small packaging machine
A spring-return labelling head that must press onto cartons at a controlled pace benefits from meter-in flow. With only a Dia 6 tube run and an M5 thread port, the PSL6M5B fits where larger 1/8 inch bodied controllers simply will not mount.
Is the Airtac PSL Throttle Speed Control Fitting PSL6M5B the Right Part?
Match the controller to your actuator first. Meter-in (this B code) suits single-acting cylinders and other loads where a spring or gravity returns the piston; for a double-acting cylinder driven by a solenoid valve, AirTAC recommends meter-out instead, because throttling the exhaust builds a back-pressure cushion and the stroke stays smooth under varying load. Prefer the knob over push-lock when settings are retuned often; if the panel gets knocked, a PTL push-lock holds its adjustment better.
On size: this is the largest tube that exists on an M5 thread in the PSL ladder - only the PSL4M5B in Dia 4 sits below it. If your cylinder needs Dia 8 tubing, M5 is no longer available and you step to a 1/8 inch thread with the PSL801B. Whichever you pick, fit the controller directly at the cylinder port so the small volume between controller and piston gives the fastest, most stable response.
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 PSL Throttle Speed Control Fitting PSL6M5B FAQ
It is a meter-in (B) speed controller for Dia 6mm soft nylon or polyurethane tubing with an M5 male PT thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it tolerates negative pressure down to -750 mmHg (10 Torr), proof pressure is 1.5 MPa, and the working temperature range is -20 to +70 C. The body is PBT plastic with a brass throttling column and an aluminium locking cap; grey is the standard colour.
No. Like every speed controller in this family, it is a throttle, not a shut-off valve, and it is designed to leak slightly when fully closed. Use a separate shut-off or the AirTAC PHV finger valve if the circuit has to be isolated. Also note that the M5 version tops out at Dia 6 tubing - there is no Dia 8 or larger option on an M5 thread.
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