ROSS – CC4 Series Double Valve

The CC4 Series valve safety function is of safe cylinder control, safe cylinder stop, and/or load-holding. This function is accomplished by blocking further supply of pneumatic energy through the valve and blocking the exhaust of any pneumatic energy from the cylinder lines and

cylinder downstream of the valve whenever the valve is shut off or a fault occurs within the valve.

The CC4 Series double valve is a 4/3 safety directional valve, closed center, designed to control the direction of air flow into and out of a double-acting cylinder or other pneumatic actuator in order to drive the cylinder forward or backward to suit the requirements of the machine operation until signaled to shut off and trap pneumatic energy in the cylinder in order to stop cylinder motion (load holding). Thus, reducing the potential hazard of unexpected cylinder motion during employee access for production-related tasks and/or minor servicing. Turning off all solenoids on the 4/3 CC4 Series valve returns the valve to the center position in order to stop cylinder motion – this also allows jogging of the cylinder.

• Redundant control with position feedback – can achieve Category 4, PL e, when used with proper safety controls.
• ROSS poppet technology – fast, reliable, dirt-tolerant, face-sealing, low friction.
• Redundant poppets prevent air from being supplied and exhausted from each outlet port.
• Mid-position sensing using magnetic proximity sensors (PNP) for detection of closed center position providing feedback to the safety control system for external monitoring.
• Dynamic, cyclical, external with customer supplied safety control system. Monitoring should check state of both valve mid-position sensors with any and all changes in state of valve control signal.
• LED indicators on solenoids – aids troubleshooting
• Manual trapped pressure relief to remove stored energy when required