The safety of your personnel and components is our first priority.
Our specialised hydraulic lifting equipment is designed for the highest level of reliability and all equipment is rigorously tested and serviced by our quality control and maintenance program. VSL field services are also based upon a total commitment to safety.The VSL Strand System
The VSL Strand System is designed for lifting or lowering suspended loads and for the pulling or sliding of loads. The main components of the system are the motive unit, the tensile member with the anchorage for the load, the pump and its controls. The unique self-gripping concept of the motive unit anchorages provides a maximum level of inherent safety.Motive Unit
The motive unit consists of a hydraulic centre hole jack and the upper and lower anchorages. The upper anchorage is attached to the jack piston.During lifting the jack is extended, causing the individual strands of the tensile member to be gripped by the upper anchorage and thus to be moved upwards. At the start of the piston’s downward movement the strands are immediately gripped by the lower anchorage, while at the same time the upper anchorage opens. The load is thus moved in a step-by-step process. For lowering operations, VSL motive units are equipped with an auxiliary device which automatically controls the opening and closing of the anchorages.
Lifting and lowering operations can therefore be carried out with the same degree of safety and speed.
Tensile Member
The tensile member consists of 7-wire pre-stressing steel strands with 15mm nominal diameter. The tensile member is anchored to the load by a specially designed end anchorage.Hydraulic Pumps
The oil flow for the motive units is provided by electro-hydraulic pumps with either single or multiple outlets.The characteristics of these pumps guarantee synchronised jack movements, even if loads are different. Built-in pressure gauges or remote pressure control devices allow pressures to be monitored at all times. The size of pump can be chosen to suit the load to be moved. Movement speeds vary according to the project and can be in an excess of 20 m/hour, if required.
