Airtac PSL Throttle Speed Control Fitting PSL6-M5B
The AirTAC Airtac PSL Throttle Speed Control Fitting PSL6-M5B 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 PSL6-M5B
The PSL6-M5B is a threaded speed controller that throttles air in one direction and lets it run free in the other, so you can set an actuator speed without adding a separate check valve. This is the B, meter-in version: flow leaving the M5 thread port into the Dia 6 tube runs free, while air returning from the tube to the port is throttled. AirTAC specifies meter-in for single-acting cylinders, where the spring does the return work and only the supply side needs controlling.
Adjustment is a grey knob on top with an aluminium locking cap: finger-set the speed, then screw the cap down so vibration or a stray sleeve cannot move the setting. The M5 thread screws straight into small valve or cylinder ports and the Dia 6 push-in accepts soft nylon or polyurethane tubing. Note this body has a fixed tube direction - the PSS universal version is the one to pick if the fitting must swivel.
Working pressure is 0-1.0 MPa with proof pressure of 1.5 MPa, vacuum to -750 mmHg, and a temperature window of -20 to +70 C. Body and throttling column are brass with a PBT holder and NBR seals.
Airtac PSL Throttle Speed Control Fitting PSL6-M5B Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL6-M5B |
|---|---|
| Type | Speed controller, threaded elbow |
| Series | PSL |
| Adjustment | Knob with aluminium-alloy locking cap |
| 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 PSL Throttle Speed Control Fitting PSL6-M5B
| 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. |
| -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 PSL Throttle Speed Control Fitting PSL6-M5B Is Used
Spring-return clamping fixture
On a milling fixture where the clamp closes by air and retracts by spring, meter-in control on the supply side gives a repeatable clamp rate without fighting the return spring.
Small laboratory dosing head
An M5 port and Dia 6 line suit compact dosing or dispensing heads where gentle, adjustable approach speed protects delicate samples and glassware.
Watch-parts press, gentle lower
A light pneumatic press lowering a tool onto tiny watch components benefits from a throttled supply stroke and the locking cap holding the setting through the shift.
Is the Airtac PSL Throttle Speed Control Fitting PSL6-M5B the Right Part?
Choose B (meter-in) if your actuator is single-acting - a spring-return clamp, a return stroke driven by a spring, or a light cylinder where the load itself pushes the piston home. If you are driving a double-acting cylinder, step to the A meter-out code instead; throttling the exhaust keeps a back-pressure cushion and avoids stick-slip under varying load.
For size: one step down on tube is the PSL4-M5B (Dia 4, same M5 thread), and the next thread up at this bore is the PSL601B with a 1/8 PT port. Stepping down shrinks flow capacity to suit thinner tubing; stepping up to the 1/8 thread suits machines where a 1/8 tapped port is already on the drawing. Mount the controller at the cylinder port, not back at the valve, so the throttled air volume stays small and the speed responds crisply.
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 PSL6-M5B FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure to -750 mmHg (10 Torr), proof pressure 1.5 MPa, operating temperature -20 to +70 C. This SKU is a Dia 6 mm push-in for soft nylon or polyurethane tubing with an M5 PT thread port, meter-in (B) control, and a knob with aluminium locking cap. Standard colour is grey; add a D suffix for black.
Meter-in throttles the air feeding the actuator, which is AirTAC's stated method for single-acting cylinders where the spring returns the piston. On a double-acting cylinder prefer meter-out (the A suffix) to keep a back-pressure cushion and avoid stick-slip. Also note a speed controller is not a shut-off valve: when fully closed it still passes a slight leak by design. Use the PHV finger valve if you need a true isolating function.
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