Thanks to our exclusive double zero-leakage block valve system, we can ensure the immobility of the load even during prolonged installation periods.

With our « Vertical Mode, » lifting and lowering loads perfectly vertically, with a single movement, becomes a reality at your command. The era of complex maneuvers is over.

Each individual machine undergoes a rigorous final inspection process, which also includes a check of residual oil contamination, ensuring compli-ance with the stringent ISO 4406 standards.

During maintenance and installation operations on machinery or their components, it is sometimes necessary to keep the load suspended for hours and ensure its complete « immobility. » Despite the apparent obviousness of this requirement, the block valves commonly installed on the boom cylinders exhibit minimal leaks, equivalent to a few drops per minute. Even the slightest leakage can affect the stability of the suspended load and therefore the outcome of the ongoing intervention. In light of these considerations, Manitex Valla has developed a unique and innovative solution: EHV is a double zero leakage block valve system, specifically designed for Pick&Carry cranes, in collaboration with Valvole Italia, a leader in this field.

The effectiveness of this solution has been demonstrated through rigorous testing, ensuring complete load stability at any height. The valve designed for this system is distinguished by its internal redundancy in load-holding functionality. Compared to traditional solutions that use a single overcenter with mechanical seal between ground components, this configuration employs two overcenters mounted on a flanged block on the cylinder, arranged in series on the load support line.

This approach significantly enhances load stability over time and provides superior performance, even in unforeseen situations of oil contamination. Additionally, the valve is equipped with a damped opening system that, in synergy with the machine’s control system, ensures precise positioning and smooth movement, even at low speeds, making it ideal for precision work.

The implementation of a specific control setting is currently underway, available on the entire V-R and V-RC series from this month. This setting emerged from the needs expressed by some customers—a missing feature in the market that no manufacturer had ever proposed. However, it will undoubtedly facilitate crane operation, enhance maneuvering safety, and, in the worst cases, prevent damage to structures and facilities. This setting is called the « Vertical Mode » and can be executed through the radio control. By performing a single and straightforward maneuver with the control joystick, it guarantees a perfectly vertical lifting or lowering maneuver without any variation in radius.

While the use of the winch and the relative block, used with the boom positioned and stationary and at a certain height already guarantees this perfectly vertical lifting trajectory, this innovative control mode will be particularly appreciated in « Hook » and « Forklift » modes, allowing for precise vertical lifting without the need to separately control the tilt and telescope of the crane arm. The decision to lift or lower is made simply through a maneuver from the radiocontrol, leaving the interpolation of the two maneuvers to the onboard software and mechatronics.