Description
GSU Series One-Way Pneumatic Speed Controller – Push-In Union
Precision Inline Pneumatic Flow Control
The GSU Series one-way pneumatic speed controllers provide precise, adjustable airflow regulation for pneumatic cylinders, actuators and industrial automation systems.
Featuring an integrated needle valve and non-return check valve bypass, these inline speed controllers restrict airflow in one direction while allowing free reverse flow. This enables controlled pneumatic cylinder movement without unnecessarily restricting the return airflow.
Available for 4 mm, 6 mm, 8 mm, 10 mm and 12 mm outside-diameter tubing, the GSU Series combines precision flow adjustment, compact construction and convenient one-touch push-in connections.
One-Way Flow Control Operation
The GSU Series incorporates an adjustable needle-type flow restrictor with an integrated non-return valve, providing directional airflow control within a compact inline fitting.
✓ Adjustable airflow restriction in one direction
✓ Integrated check valve for free reverse airflow
✓ Precision needle adjustment for cylinder speed control
✓ Knurled adjustment screw for fine airflow regulation
✓ Locknut maintains the selected flow setting
✓ Moulded pneumatic circuit symbol identifies valve function
✓ Inline installation with one-touch push-in connections
The adjustable restriction allows pneumatic cylinder extension or retraction speeds to be controlled according to the valve installation and airflow direction.
The integrated non-return valve permits reverse airflow to bypass the needle restriction, helping maintain efficient pneumatic operation.
Durable & Lightweight Construction
Manufactured with a lightweight PA66 engineering plastic body, the GSU Series is designed for reliable performance in industrial pneumatic applications.
NBR sealing rings provide effective pneumatic sealing, while stainless-steel locking claws and POM components ensure secure tubing retention and convenient installation.
The zinc-alloy release collet allows tubing to be disconnected without specialist tools.
The metal needle adjustment assembly incorporates a knurled control screw and locking nut, enabling precise flow regulation while helping prevent accidental changes to the selected setting.
Integrated mounting holes allow the controller to be secured directly to equipment, panels or machine frames.
Technical Specifications
Valve type: One-way pneumatic flow controller
Flow control: Adjustable needle restriction
Reverse flow: Integrated non-return bypass
Connections: Push-to-connect tube union
Tube sizes: 4, 6, 8, 10 and 12 mm OD
Compatible tubing: Nylon and Polyurethane
Operating pressure: 0 to 10 bar (0–150 PSI)
Maximum pressure: 15 bar (217 PSI)
Vacuum rating: –1 bar (–100 kPa)
Temperature range: –20°C to +70°C
Body material: PA66 engineering plastic
Sealing material: NBR
Locking claws: Stainless steel
Sleeve and lock ring: POM
Release collet: Zinc alloy
Adjustment: Knurled screw with locknut
Mounting: Integrated fixing holes
Available GSU Models
GSU04 – 4 mm Tube OD
Overall length: 40 mm
GSU06 – 6 mm Tube OD
Overall length: 47 mm
GSU08 – 8 mm Tube OD
Overall length: 52 mm
GSU10 – 10 mm Tube OD
Overall length: 62.5 mm
GSU12 – 12 mm Tube OD
Overall length: 74 mm
All models feature inline push-in connections, adjustable needle flow control and integrated mounting provisions.
Typical Applications
The GSU Series is suitable for pneumatic airflow regulation across a wide range of industrial applications.
✓ Pneumatic cylinder extension and retraction speed control
✓ Air-operated actuators and automation equipment
✓ Industrial machinery and production systems
✓ Pneumatic motion and positioning circuits
✓ Directional airflow and exhaust regulation
✓ Pneumatic test and control equipment
✓ Compact pneumatic control panels
✓ Automated assembly and handling systems
Installation & Adjustment
Install the GSU speed controller inline with compatible pneumatic tubing, ensuring the controlled airflow direction matches the pneumatic circuit symbol moulded into the valve body.
Insert the tubing fully into each push-in connector to achieve secure retention and effective sealing.
Adjust the knurled needle screw to obtain the required airflow and cylinder speed, then tighten the locking nut to maintain the selected setting.
The integrated mounting holes provide additional installation security where required.
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