Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD
The AirTAC Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD is a genuine universal speed controller with knob with aluminium-alloy locking cap and 360 degree adjustable tube direction, used to set the speed of a pneumatic cylinder by throttling its air.
- TypeUniversal speed controller
- SeriesPSS
- 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD
The PSS801BD is a universal speed controller: it throttles air in one direction and passes it freely in the other, so an actuator's stroke speed is set exactly where the work needs it. This code carries the B mark, AirTAC's meter-in setting. Flow from the 1/8in thread port into the Dia 8 tube runs unrestricted, while the reverse path is throttled. AirTAC's own guidance pairs meter-in with single-acting, spring-return cylinders, where there is no exhaust air cushion to manage.
Adjustment is a knob with an aluminium locking cap, so a set speed survives vibration and casual contact. What separates PSS from the fixed-body PSL is the swivel: both tube unions rotate a full 360 degrees, letting the Dia 8 soft nylon or polyurethane line approach from any angle on a crowded manifold. The D suffix orders black instead of the standard grey. The body and throttling column are brass with NBR seals.
Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD Technical Specifications
| Model | Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD |
|---|---|
| Type | Universal speed controller |
| Series | PSS |
| Adjustment | Knob with aluminium-alloy locking cap |
| Orientation | 360 degree adjustable 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD
| PSS | Universal speed controller. |
|---|---|
| 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD Is Used
Spring-return swing clamp on a welding fixture
Meter-in control meters the air filling the clamp cylinder, so the arm closes gently onto sheet metal before the spring side takes over on retract.
Single-acting kick cylinder on a drill-jig ejector
The Dia 8 bore feeds a compact ejector that pops a finished bushing out of its jig; the throttled return keeps the part from being launched across the bench.
Bench-top bottle-capping press
A single-acting ram presses caps onto glass bottles; meter-in lets the operator dial in a slow, even press so torque stays consistent batch to batch.
Is the Airtac PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD the Right Part?
Pick the B (meter-in) setting when your actuator is single-acting or spring-return. For a solenoid-driven double-acting cylinder, the A sibling is the better default: throttling the exhaust leaves a back-pressure cushion and the stroke stays smooth under changing load, while meter-in on the same cylinder tends to stick-slip. Sizing: on the 1/8in thread this prefix starts at Dia 6 and tops out here at Dia 8, so this is the largest bore you can hang off a 1/8in port. The next bore up, Dia 10, moves to the 1/4in thread, and Dia 12 sits on the 3/8in and 1/2in rungs. If your port is already 1/4in, the same Dia 8 combination exists there and saves an adapter. Mount the controller directly at the cylinder port so the throttled 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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, usable under vacuum to -750 mmHg (10 Torr), and a temperature range of -20 to +70 C. This SKU is the Dia 8 tube size on a 1/8in PT male thread, meter-in (B) control method, in black (D suffix). It runs on soft nylon or polyurethane tubing.
You can, but AirTAC advises against it. Meter-in on a double-acting cylinder tends to stick-slip as the load changes, because there is no back-pressure cushion on the exhaust side. For double-acting duty, order the same part with an A suffix for meter-out control and throttle the exhaust instead.
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 PSS Exhaust Throttle Type Universal Speed Control Valve PSS801BD
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.