Airtac PSL Throttle Speed Control Fitting PSL602A-S
SUS304 stainless variant (-S)The AirTAC Airtac PSL Throttle Speed Control Fitting PSL602A-S 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 PSL602A-S
The PSL602A-S is a stainless-steel AirTAC speed controller that slows an actuator by throttling the air leaving the cylinder while letting supply air pass through freely. Because the -A code makes it a meter-out type, the restriction sits on the exhaust path: the cylinder holds a back-pressure cushion through the whole stroke, which is exactly why AirTAC ranks meter-out as the first choice and why it keeps a double-acting cylinder smooth instead of stick-slipping under a changing load. The handle carries an A marking so anyone on the shop floor can confirm the control direction before turning it.
This -S variant swaps the brass throttling column for SUS304 and fits a stainless spring gasket, giving you copper-free internals for wash-down areas, plating shops and electronics work where copper contamination is unacceptable. Adjustment is a knob with an aluminium locking cap, so once the stroke speed is set the cap can be snugged down to stop vibration walking it off. It threads a 1/4in PT port and grips Dia 6 soft nylon or polyurethane tubing, with the tube direction fixed in the body. Ratings are the standard PSL profile: 0-1.0 MPa working, 1.5 MPa proof, -20 to +70 C, and it also handles vacuum down to -750 mmHg (10 Torr).
Airtac PSL Throttle Speed Control Fitting PSL602A-S Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL602A-S |
|---|---|
| Type | Speed controller, threaded elbow |
| Series | PSL |
| Adjustment | Knob with aluminium-alloy locking cap |
| 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 PSL Throttle Speed Control Fitting PSL602A-S
| 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. |
| -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 PSL Throttle Speed Control Fitting PSL602A-S Is Used
Plating-line transfer arm
A copper-free SUS304 throttling column suits plating and chemical-dip stations where brass parts corrode or contaminate the bath chemistry, while the meter-out control eases the transfer arm down into the rack.
Electronics fixture clamp
On PCB test and assembly fixtures, copper particles can spoil solderability; the stainless internals and 1/4in PT port let the clamp close gently onto finished boards without shedding copper dust.
Bottling line conveyor stop
A Dia 6 stopper cylinder timed by a meter-out controller holds back bottles on a wash-down conveyor line, where the stainless build survives frequent hose-down better than a brass-bodied part.
Is the Airtac PSL Throttle Speed Control Fitting PSL602A-S the Right Part?
Match the control method to the actuator before anything else. Meter-out (-A) is the default for a double-acting cylinder driven by a solenoid valve; meter-in (-B) belongs on single-acting cylinders and tends to give jerky motion on double-acting ones. If you want a hand that resists being knocked out of adjustment but turns up quickly, the knob-and-locking-cap PSL is the right shape; push-lock PTL caps trade that for a lighter detent. Remember the PSL body has a FIXED tube direction - if your plumbing needs the swivel, move up to the PSS family instead.
Sizing on this code: Dia 6 is the smallest tube AirTAC offers on a 1/4in thread, so the only step up within this thread is Dia 8 (PSL802A-S); to go smaller you drop to a 1/8in thread with the PSL601A-S. A bigger bore carries more air, so a heavier cylinder needs it, but the practical rule stays the same: mount the controller directly at the cylinder port so the volume being throttled stays small and the speed response stays 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 PSL Throttle Speed Control Fitting PSL602A-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2); negative pressure -750 mmHg (10 Torr); proof pressure 1.5 MPa; operating temperature -20 to +70 C. This SKU is the -S variant: Dia 6 mm tube on a 1/4in PT thread, meter-out (-A) control, with a SUS304 throttling column and stainless spring gasket. It runs on soft nylon or polyurethane tubing; the -S change affects materials only, not the pressure, temperature or dimension tables of the standard PSL602A.
Fit it directly at the cylinder port. Meter-out throttling works best when the restricted volume is small, so mounting at the port (rather than back at the valve) gives the fastest, most repeatable speed setting. Do not use it as a shut-off: a speed controller leaks slightly by design when closed fully. For isolating the line, use a dedicated shut-off valve - AirTAC's PHV finger valve is the shut-off part in this range.
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