Elevators which run on hydraulics rely on several components: cylinders, pistons, fluid reservoirs, rotary pumps, valves and hydraulic fluid. Trident Hydraulics supply a varied range of power packs for lifts which have proven efficiency and quality. By harnessing hydraulic mechanisms, the lift is able to handle much greater weights – both that of the lift carriage itself and the load – than those which rely on a rope mechanism.

The control mechanisms in lifts that are operated with hydraulics allow for passengers to operate the lift via a switch system inside the car. This ensures safety and efficiency when the lift is operating.

Fluid is forced from the tank by a pump, which then leads to the cylinder. The valve is opened, releasing the fluid, returning to the reservoir. When the valve is closed, the pressurized fluid is stored up, collecting in the cylinder until eventually it impacts the piston causing the elevator car to lift up.

Control panels are essential to send signals to stop the car when the elevator has reached its destination, preventing it from moving past the floor level or moving beyond where controlled to. The speed of which the elevator car travels is also controlled through the hydraulic system, enabling a smooth, measured ride.


The benefits of a compact hydraulic power pack are numerous. They can be adopted for a variety of uses, including lifting platforms, elevating tables, machine tools and mobile applications. The power packs consist of a pump, an electric motor, a tank and a manifold. SMA 03 Compact Power Packs are available from Trident Hydraulics.


Designed specifically for applications which have small envelope dimensions and those which require low noise levels, under oil power packs are ideal for lifting platforms. Despite the compact nature of the under oil power pack, the power ratio to size is incredibly high.


The SMA 04 has five basic circuits in the manifold, and is used in lifting platforms, ramps, machine tools and mobile applications. Depending on the application, there is also the possibility of making up additional circuits in vertical or horizontal stacking assemblies.