The excavator pipe rupture valve is used wherever so required by the standards ISO 8643 and EN 474 for excavators with a lifting device (e.g. a load hook on the bucket). The actuators concerned are the lift cylinder, the stick cylinder and the adjusting cylinder. The valve should also be used on machines in which a pipe rupture on the actuators could produce dangerous situations (e.g. machines for materials handling and demolition).
The excavator pipe rupture valve, series CFS (Compact Flow Control and Safety Valve), prevents uncontrolled lowering of the actuator in the event of a pipe or hose rupture. In addition, the CFS valve holds the actuator in its position when the main valve is centred. The valve also includes a secondary pressure-relief function, which protects the actuator against overload. The inlet and actuator ports on the CFS are standard SAE flanged ports, and the valve can therefore be retrofitted to existing equipment without any difficulty.
