IL220-N02-L: Safety Locking, Pressure Retention upon Air Loss! Pilot-Operated Pneumatic Lock Valve Empowers Safety Control Systems

In safety-critical applications where it is essential to maintain the current position of an actuator (such as a cylinder) and prevent unintended movement caused by load gravity or external forces during failures like loss of air supply or power, standard solenoid valves cannot meet the position-holding requirement. The IL220-N02-L is a pilot-operated pneumatic lock valve (also known as a pressure-holding valve or lock-up valve). It automatically locks the air circuit via its internal mechanical structure upon loss of electrical power, achieving safe position retention for the actuator. It is an ideal safety component for applications like vertical lifting and clamping.Core Product Advantages

• Safe Position LockingIn the event of power failure or pressure loss, the valve spool automatically switches to the locked state via spring force or pressure difference, sealing the air passages on both sides of the actuator (cylinder). This prevents load descent or shifting, ensuring safety.
• Pilot OperationUtilizes a pilot-operated design. A small-diameter control signal (pilot air) is sufficient to actuate the main valve spool, offering sensitive control and low power consumption.
• Double-Acting Safety ProtectionSuitable for double-acting cylinders. It can simultaneously lock the cylinder’s inlet and exhaust ports, reliably securing the piston rod at any position.
• Manual Override FunctionEquipped with a manual override device (typically a button or pull-ring), facilitating manual resetting or debugging during system failures, thereby enhancing safety.
• High ReliabilityFeatures a precision internal structure and excellent sealing performance with minimal leakage, ensuring reliable locking.

Typical Application Scenarios

• Vertical lifting mechanisms: Prevent platforms, robotic arms, etc., from descending under their own weight upon air loss.
• Safety clamping devices: Ensure workpieces remain securely clamped in jigs or molds even during pressure loss.
• Safety guarding equipment: Serves as a locking unit for safety doors or protective covers.
• Mid-stroke position holding: Applications requiring the cylinder to be locked at any point in its stroke.

Technical Parameters (Typical Values)

• Port Size: G1/4″ (Common)
• Operating Pressure Range: 0.1 ~ 1.0 MPa
• Pilot Control Pressure: Related to operating pressure
• Temperature Range: -5℃ ~ +60℃

SummaryThe IL220-N02-L lock valve acts as a “Safety Guardian” for pneumatic safety control circuits. Through its reliable locking function, it provides a fail-safe barrier for pneumatic systems, effectively preventing dangerous equipment movements caused by power source failure. It is a key component for enhancing equipment safety.Choosing the IL220-N02-L means choosing to inject reliable safety assurance into your critical applications!