https://www.gazzeraitaly.com/en/guides/ Technical guides on hydraulic power packs and power units by the Gazzera engineering team. en-GB Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/how-to-choose-a-hydraulic-power-pack/ https://www.gazzeraitaly.com/en/guides/how-to-choose-a-hydraulic-power-pack/ Choosing a hydraulic power pack requires 6 inputs: required force (which sets the pressure), movement speed (the flow), duty cycle (the motor type), available voltage, oil volume (the reservoir) and control functions (the valves). With these 6 inputs, configuration is almost automatic. Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/12v-vs-24v/ https://www.gazzeraitaly.com/en/guides/12v-vs-24v/ At equal power, a 24V power pack draws half the current of a 12V one: thinner cables, lower voltage drop, less-stressed contactors and longer motor life. 12V remains mandatory where the on-board system is 12V without a converter, that is, on most trailers and light vehicles. Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/ac-vs-dc/ https://www.gazzeraitaly.com/en/guides/ac-vs-dc/ As a rule of thumb, mains power and long cycles call for an AC motor in continuous S1 duty; battery power and short cycles call for a DC motor in intermittent S3 duty. Borderline cases are decided by the actual duty cycle, not the catalogue. Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/reservoir-sizing/ https://www.gazzeraitaly.com/en/guides/reservoir-sizing/ The reservoir must hold at least the oil volume displaced by the cylinders plus a safety reserve, and must be verified for heating on intensive cycles. Undersizing is the most frequent mistake we see, and one of the costliest to fix on a finished machine. Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/power-pack-vs-power-unit/ https://www.gazzeraitaly.com/en/guides/power-pack-vs-power-unit/ As a rule of thumb, up to about 5.5 kW and 20 l/min (the limits of our Group 1 AC line) the compact power pack is the most cost-effective solution; beyond that, or with multiple simultaneous actuators, heavy continuous duty and heat exchangers, a custom-engineered hydraulic power unit takes over. Gazzera builds both, so we draw the line based on the application, not the catalogue. Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/how-a-gear-pump-works/ https://www.gazzeraitaly.com/en/guides/how-a-gear-pump-works/ A hydraulic gear pump works like this: two meshing gears rotate inside a housing; oil fills the spaces between teeth on the suction side, is carried along the walls and pushed out on the delivery side. The pump generates flow, not pressure: pressure arises from the resistance the circuit offers to that flow. Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/hydraulic-power-pack-cost/ https://www.gazzeraitaly.com/en/guides/hydraulic-power-pack-cost/ The price of a compact hydraulic power pack depends on motor, pump, reservoir, valves and customisation: a standard compact configuration typically starts at a few hundred euros, while custom multi-function configurations with solenoid valves can exceed a thousand euros. Made-to-measure power units are a different matter. Here, transparently, are the variables that matter. Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/12v-wiring/ https://www.gazzeraitaly.com/en/guides/12v-wiring/ The basic wiring of a 12V power pack has three branches: the power branch (from battery to start solenoid/contactor and on to motor, with generously sized cables and a fuse near the battery), the control branch (pushbutton or pendant energising the contactor) and the solenoid-valve branch. 90% of problems come from undersized cables and sloppy grounds. Fri, 16 Oct 2026 08:00:00 GMT https://www.gazzeraitaly.com/en/guides/which-hydraulic-oil/ https://www.gazzeraitaly.com/en/guides/which-hydraulic-oil/ Most compact hydraulic power packs run on mineral hydraulic oil with anti-wear additives (HLP type) in ISO VG 32 or 46 viscosity: VG 32 for cold climates or DC units with frequent starts, VG 46 for hot climates and prolonged duty. For widely varying temperatures, high-viscosity-index HV fluids exist. Fri, 16 Oct 2026 08:00:00 GMT