Air Throttle Valve
AS Series Pneumatic Speed Controller is designed for precise cylinder speed adjustment. Featuring compact structure, quick installation, stable airflow control and long service life, it is widely used in automation equipment, pneumatic systems and industrial machinery.
- Product Introduction
The AS Series is an exhaust‑side flow control valve engineered to regulate cylinder speed by throttling outgoing air rather than incoming air. This meter‑out approach holds a controlled back‑pressure inside the cylinder chamber, which keeps piston motion even and predictable instead of jerky or load‑dependent.
Compared with conventional inlet (meter‑in) throttling, exhaust‑side regulation responds better to load changes, gravity‑assisted motion, and low‑speed travel - conditions where standard flow valves often cause hesitation, overshoot, or crawling.
Typical symptoms it addresses on unregulated or poorly‑tuned cylinders: Jerky or "stick‑slip" motion at low speed Overshoot when the load direction assists travel (e.g., vertical drop) Speed drift as load or friction varies during a cycle.
Built with a compact body, a fine‑pitch needle valve for sensitive adjustment, and a push‑in fitting for tool‑free tube connection, the AS Series is used across automation, assembly, packaging, and precision motion equipment where repeatable cycle timing matters.
Key Features
Meter‑Out (Exhaust‑Side) Flow Control
Regulates air leaving the cylinder instead of air entering it, so chamber pressure stays consistent through the stroke. This is the structural reason the AS Series outperforms inlet throttling on loaded or vertical axes - pressure is controlled on the side that resists motion, not the side driving it.
Low‑Speed Stability
Needle‑valve metering gives fine control at the low end of the flow range, where inlet‑throttled cylinders are most prone to crawling. This makes the AS Series suited to slow, controlled moves - index tables, soft‑landing actuators, and gravity‑return axes.
Repeatable Positioning
Because exhaust back‑pressure is consistent cycle to cycle, stroke timing and end‑of‑travel behavior repeat more closely - useful where positioning accuracy or synchronized multi‑axis timing is required.
Compact, Serviceable Installation
Mounts directly on the cylinder port with a push‑in fitting - no tools needed for tube connection or replacement, and the low profile suits space‑constrained equipment layouts.
Why Choose the AS Series
✅Exhaust‑side control for stable behavior under variable or assisting loads
✅Fine needle‑valve adjustment for genuinely smooth low‑speed travel
✅Repeatable cycle timing for positioning‑sensitive applications
✅Compact, tool‑free push‑in installation
✅Available across common metric and imperial thread/tube sizes for OEM integration
Technical Specifications
|
Air tubeφD |
Model |
Connection thread |
Fitting hex |
Fitting shape |
|||||
|
Specification |
A/A1 |
H |
S |
L |
φ |
Φ1 |
B |
||
|
Φ4 |
AS1201F-M3-04 |
M3 X 0.5 |
3.1 |
3.2 |
8 |
17.8 |
9.6 |
9.6 |
12 |
|
AS1201F-M5-04 |
M5 X 0.8 |
4 |
3.2 |
8 |
17.8 |
9.6 |
12 |
||
|
AS2201F-01-04S |
1/8" |
7.5 |
3.5 |
12 |
20 |
14.2 |
13 |
||
|
AS2201F-02-04S |
1/4'' |
10.5 |
4 |
17 |
25 |
10.8 |
18.4 |
14 |
|
|
Φ6 |
AS1201F-M3-06 |
M3 X 0.5 |
3.1 |
3.2 |
8 |
18 |
11.8 |
9.6 |
12 |
|
AS1201F-M5-06 |
M5 X 0.8 |
4 |
3.2 |
8 |
18 |
9.6 |
12 |
||
|
AS2201F-01-06S |
1/8'' |
7.5 |
3.5 |
12 |
21 |
14.2 |
13 |
||
|
AS2201F-02-06S |
1/4'' |
10.5 |
4 |
17 |
24.2 |
18.4 |
14 |
||
|
AS3201F-03-06S |
3/8'' |
11 |
4 |
19 |
28.8 |
13.3 |
22.5 |
18 |
|
|
Φ8 |
AS2201F-01-08S |
1/8'' |
7.5 |
3.5 |
12 |
24.5 |
15.8 |
14.2 |
13 |
|
AS2201F-02-08S |
1/4'' |
10.5 |
4 |
17 |
26 |
18.4 |
14 |
||
|
AS3201F-03-08S |
3/8'' |
11 |
4 |
19 |
32.6 |
22.5 |
18 |
||
|
Φ10 |
AS2201F-01-10S |
1/8'' |
7.5 |
3.5 |
12 |
29.6 |
19 |
14.5 |
12 |
|
AS2201F-02-10S |
1/4'' |
10.5 |
4 |
17 |
35.2 |
18.4 |
14 |
||
|
AS3201F-03-10S |
3/8'' |
11 |
4 |
19 |
31.6 |
22.5 |
18 |
||
|
AS4201F-04-10S |
1/2'' |
14.5 |
4 |
24 |
33.3 |
28 |
21.6 |
||
|
Φ12 |
AS3201F-03-12S |
3/8'' |
11 |
4 |
19 |
32.3 |
21.3 |
22.5 |
18 |
|
AS4201F-04-12S |
1/2'' |
14.5 |
4 |
24 |
34.6 |
28 |
21.6 |
||
*Trip ring available colors: gray, orange-red, black; plastic housing available colors: gray, black.
Applications
ndustrial automation equipment
Assembly and packaging machinery
Semiconductor and electronics production lines
Robotic and multi‑axis automation systems
Precision positioning equipment
FAQ
Q1:When should I use meter‑out instead of meter‑in control?
A1:Meter‑out is generally the better default for vertical cylinders, variable or assisting loads, and any application where low‑speed smoothness matters more than simplicity.
Q2:Can the AS Series replace an existing inlet flow control valve?
A2:In most cases yes - it mounts on the same port using the same tube sizes, but the exhaust side (not the supply side) needs to be metered for the meter‑out behavior to take effect.
Q3:Does the needle valve setting need to be re‑tuned after installation?
A3:Yes - initial commissioning typically requires adjusting the needle valve while observing the actual stroke, then locking the setting once the desired speed profile is reached.
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