Airtac PSL Throttle Speed Control Fitting PSL602BD-S
SUS304 stainless variant (-S)The AirTAC Airtac PSL Throttle Speed Control Fitting PSL602BD-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 PSL602BD-S
The PSL602BD-S is a SUS304 stainless speed controller that sets the speed of an actuator by throttling air in one direction while letting it pass freely in the other. This code carries the B suffix, so it is the meter-in version: air from the 1/4in thread port to the Dia 6 tube runs free, and the return flow from tube to port is controlled. The adjusting cap carries a B marking. AirTAC positions meter-in for single-acting cylinders, where the exhaust side is open and metering the supply is the natural way to soften the stroke. The body is the classic PSL screw-in shape: the 1/4in PT thread goes into the cylinder port and the Dia 6 one-touch tube points in a single fixed direction. It shares the same ratings and dimension tables as the standard PSL602B; the difference is inside, where the brass throttling column is replaced by SUS304 and the spring gasket is stainless too.
Adjustment is by hand knob with an aluminium locking cap - screw it down after setting and vibration cannot drift your speed. The D suffix denotes the black colourway. Because the column, spring gasket and the aluminium-alloy or SUS304 throttling body are built for corrosive and copper-sensitive areas, this part suits wash-down food machinery, plating lines and electronics processes where a brass column would pit or contaminate. Use soft nylon or polyurethane tubing between -20 and +70 C at up to 1.0 MPa.
Airtac PSL Throttle Speed Control Fitting PSL602BD-S Technical Specifications
| Model | Airtac PSL Throttle Speed Control Fitting PSL602BD-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 PSL602BD-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 PSL602BD-S Is Used
Single-acting tray-sealing clamp
A spring-return clamp that lowers a heat-sealing head onto filled trays in a wash-down packaging line. Meter-in control softens the closing stroke so the seal lands gently, and the SUS304 internals survive daily caustic wash-down that would pit a brass column.
Plating-line lifting ram
A single-acting ram that lifts racks out of an electroplating bath at a controlled rate. Copper-free and stainless construction avoids copper contamination in the process chemistry, and the Dia 6 tube keeps the valve compact at the tank edge.
Single-acting die marker
A single-acting stamping and marking cylinder on an electronics assembly bench, where the strike must be slowed to a repeatable cadence. The knob with locking cap holds the setting through shift after shift of machine vibration.
Is the Airtac PSL Throttle Speed Control Fitting PSL602BD-S the Right Part?
Meter-in (B) is the right pick when your actuator is single-acting - a spring-return clamp or a single-port ram - because the free stroke direction is the unpowered return. If you are driving a double-acting cylinder from a solenoid valve, AirTAC's own guidance is to choose meter-out (A) instead: throttling the exhaust builds a back-pressure cushion that keeps the stroke smooth, while meter-in can stick-slip under a changing load. Knob types like this PSL are faster to set by hand than the PTL push-lock range, though push-lock resists accidental adjustment better; if your pipe runs need the tube to swivel, step across to the PSS series.
Sizing: on the 1/4in PSL ladder Dia 6 is the smallest bore AirTAC makes - there is no Dia 4 at this thread. If your flow demand is light, dropping to PSL601B (Dia 6, 1/8in thread) saves port space; stepping up to PSL802B (Dia 8) or PSL1002B (Dia 10) increases tube capacity for longer runs or bigger actuators. Fit the controller directly at the cylinder port so the throttled air volume stays small and 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 PSL602BD-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, usable in vacuum down to -750 mmHg (10 Torr), operating temperature -20 to +70 C. This SKU is the Dia 6 tube x 1/4in PT-thread version, meter-in (B) control, black (D) finish. The throttling column is SUS304 instead of brass and the spring gasket is stainless; every pressure, vacuum and temperature figure is identical to the standard PSL602B.
Usually not. AirTAC states that meter-out is the first priority: on a double-acting cylinder driven by a solenoid valve, throttling the exhaust (the A type) leaves a back-pressure cushion that keeps the stroke smooth, while meter-in tends to stick-slip under a changing load. The B control on this part is intended for single-acting cylinders, where the supply side is the only side worth metering.
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 PSL Throttle Speed Control Fitting PSL602BD-S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.