Overview
The Unist 02-02 pneumatic flow control valve is a precision instrument designed for controlling airflow in pneumatic systems and MQL (minimum quantity lubrication) delivery systems. This valve combines a needle valve with an integral check valve, enabling one-way metered flow control while maintaining full unrestricted flow in the opposite direction. The 02-02 configuration supports standard port sizes and is widely used in precision machining, manufacturing automation, and compressed air circuits where controlled speed regulation is essential.
Key Features
- One-way flow control with integrated check valve for independent direction control
- Adjustable needle valve for fine-tuned airflow regulation
- Meter-out design minimizes stick-slip phenomena in pneumatic actuators
- Compact valve body suitable for inline or manifold mounting
- Suitable for air and inert gas applications in standard industrial pneumatic systems
Technical Specifications
- Valve Type: Unidirectional flow control (needle + check valve)
- Port Configuration: 02-02 (verify exact port size with distributor)
- Operating Pressure Range: 1–10 bar (0.1–1.0 MPa)
- Flow Control Method: Adjustable needle orifice
- Check Valve Function: Integral; enables free flow in one direction
- Adjustment: Manual needle adjustment
- Application Medium: Compressed air, inert gases
- Body Material: Brass (standard for pneumatic control valves)
Typical Applications
Pneumatic Actuator Speed Control: Flow control valves find wide application in regulating the speed of pneumatic actuators, particularly cylinders. The Unist 02-02 is commonly deployed to manage extension and retraction speeds in double-acting cylinder circuits.
MQL and Lubrication Systems: Unist valves serve in minimum quantity lubrication systems where precise control of coolant and air mixture is critical for tool life and surface finish.
Compressed Air Networks: Used in plant air systems, automated assembly lines, and robotic equipment where consistent actuator performance is required.
Manufacturing and Machining: Applied in CNC machines, drilling, turning, and grinding operations where controlled cylinder speed prevents tool chatter and improves part tolerances.
Compatibility & Replacements
Compatible With
- Pneumatic cylinders (single-acting and double-acting)
- Pneumatic actuators and motors
- Directional control valves (2/2, 3/2, 4/2, 5/2 configurations)
- Standard industrial compressed air systems (1–10 bar)
- MQL delivery systems and air-atomized lubrication circuits
- Automated manufacturing equipment
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. Standard Unist 02-02 replacement valves with matching port sizes and operating pressure ranges are drop-in compatible with existing installations using the same configuration.
Works With
- Pneumatic manifold blocks and sandwich mounting configurations
- ISO 1219-1 compliant pneumatic circuits
- Meter-out speed control setups (industry standard for cylinder control)
- Hand adjustment via slotted stem or adjustment screw
- Manual or automated directional control systems
