How Do Hydraulic Hand Pumps Work?
Hydraulic hand pumps work by manually converting mechanical energy (your hand or arm movement) into hydraulic energy, using pressurised fluid, to perform work that includes lifting, clamping, or pressing. Hydraulic hand pumps operate on the principle of Pascal’s Law, which states that pressure applied to a confined fluid is transmitted equally in all directions. By applying force to a piston, the pump increases the pressure of hydraulic fluid, which is then directed to a hydraulic system, such as a cylinder, to perform work. Hydraulic hand pumps are often used in environments where there is no access to electricity or compressed air, making them a convenient and portable solution for a variety of tasks.
How Do High Pressure Hydraulic Hand Pumps Work?
- Manual Lever and Piston Design: The operator actuates a handle connected to a piston inside the pump. Each stroke draws hydraulic fluid from a reservoir and forces it into the system, incrementally increasing the pressure.
- Small Effective Piston Area: The pump’s piston is engineered with a small surface area. According to the formula P=F/A (pressure equals force divided by area), a smaller piston area allows the same manual force to generate much higher pressures. This design is essential for reaching high-pressure thresholds.
- Multi-Stage Pumping: In some pump types, multi-stage designs are used. Each stage progressively compresses the fluid, with smaller pistons in later stages boosting the pressure to very high levels. This staged compression enables the achievement of high pressures with manageable manual effort.
- Check Valves and Seals: Integrated check valves ensure one-way flow, preventing backflow and maintaining pressure after each stroke. High-quality seals and materials are used to prevent leaks and withstand the mechanical stress of high-pressure operation
- Safety and Pressure Relief: Relief valves are incorporated to prevent over-pressurisation, protecting both the user and the equipment from over-pressurisation.
Single & 2-Speed Hydraulic Hand Pumps
For many applications, a single-speed hand pump may be sufficient, but for projects requiring greater flow, larger hydraulic cylinders or multiple cylinders, a single-speed pump can be slower and require greater manual effort.
The alternative is a 2-speed hydraulic pump (also known as 2-stage), which can deliver higher flow rates at lower working pressures. This can greatly reduce the number of handle strokes required.
Single-Speed Hydraulic Hand Pumps: These pumps provide a consistent flow of fluid with each down stroke of the handle. They are simple to use and maintain, making them a great choice for basic applications that do not require a rapid flow of hydraulic fluid.
2-Speed Hydraulic Hand Pumps: These pumps offer two stages of fluid delivery: a high-flow, low-pressure stage to quickly move the hydraulic cylinder into position, and a low-flow, high-pressure stage for precise control. This reduces operator fatigue and increases efficiency, especially when working with long-stroke hydraulic cylinders.
When using a hand pump with double-acting cylinders, a double-acting hand pump will be required.
BOSS Hydraulics Hand Pumps
BOSS Hydraulic hand pumps are available in both single and 2-speed options, with both single and double acting models, and are designed to withstand a maximum working pressure of 10,000 psi / 700 bar. See the handy pump selection guide below to help you choose the right hand pump for your application and… let your BOSS do the hard work.
CLICK HERE to view our handy pump selection guide
CLICK HERE to find out more about the BOSS Hydraulics High-Pressure Hand Pump range