A valve unit comprising: - a first working port and a second working port, which are configured for connection to a first hydraulic distributor; - a third working port and a fourth working port, which are configured for connection to a second hydraulic distributor; - a fifth working port and a sixth working port, which are configured for connection to a respective fluid chamber of a first hydraulic actuator that can be driven by means of the first hydraulic distributor; and - a seventh working port and an eighth working port, which are configured for connection to a respective chamber of a second hydraulic actuator that can be driven by means of the second hydraulic distributor; wherein: - a first power line connects said first working port to said fifth working port; - a second power line connects said second working port to said sixth working port; - a third power line connects said third working port to said seventh working port; and - a fourth power line connects said fourth working port to said eighth working port, characterised in that the valve unit moreover includes: - a first flow regulating valve including an inlet port, which is connected to said first power line at a first circuit node and is in fluid communication with said fifth working port, and a first outlet port (RQ1A), connected to said fourth power line at a second circuit node; and - a second flow regulating valve including an inlet port, which is connected to said second power line at a third circuit node and is in fluid communication with said sixth working port, and a first outlet port (RQ2A), connected to said third power line at a fourth circuit node. - a first working port and a second working port, which are configured for connection to a first hydraulic distributor; - a third working port and a fourth working port, which are configured for connection to a second hydraulic distributor; - a fifth working port and a sixth working port, which are configured for connection to a respective fluid chamber of a first hydraulic actuator that can be driven by means of the first hydraulic distributor; and - a seventh working port and an eighth working port, which are configured for connection to a respective chamber of a second hydraulic actuator that can be driven by means of the second hydraulic distributor; - a first power line connects said first working port to said fifth working port; - a second power line connects said second working port to said sixth working port; - a third power line connects said third working port to said seventh working port; and - a fourth power line connects said fourth working port to said eighth working port, - a first flow regulating valve including an inlet port, which is connected to said first power line at a first circuit node and is in fluid communication with said fifth working port, and a first outlet port (RQ1A), connected to said fourth power line at a second circuit node; and - a second flow regulating valve including an inlet port, which is connected to said second power line at a third circuit node and is in fluid communication with said sixth working port, and a first outlet port (RQ2A), connected to said third power line at a fourth circuit node.