Hydraulics – Series vs. Parallel

Hydraulics – series vs parallel

As with anything, there are good, better, and best ways to do anything. We chose to do things the best way. That’s why we use the best components specifically engineered for processing firewood. Even the splitting cylinder is a welded design to withstand the rigors of constant high pressure work. Our valves are in series, giving you considerably higher performance – our processing speed run circles around the competition. Ask yourself, do I want an engineered product or something less?The biggest hydraulic advantages that separates us from ALL the competition is – We don’t WASTE horsepower and our performance NEVER Lags!

Here’s why-

  • Wood Beaver hydraulic systems operate in Series, all of our competition operate in Parallel. Parallel hydraulic systems flow share between functions. It is the cheapest way to set up a machine, and the worst way. What makes this bad? Hydraulic oil will always follow the path of least resistance, meaning, when operating one or more functions simultaneously (i.e. a discharge conveyor and a saw), the function that requires the least amount of pressure will get the most flow until it is pressure saturated to the point that the other function gets some flow, but because they share flow, neither one can run at full speed. The more functions you try to operate at the same time, the more flow sharing occurs and the more obvious the fall in speed becomes. The more you try to do, the slower the machine operates!To try to overcome this, manufacturers install flow regulators to prioritize flow to some functions.This means the bypass flow happens at that functions operating pressure and that builds HEAT. So not only are you wasting horsepower (since it’s not doing work) you are also adding heat in the system (1 HP of waste = 2545 BTU/HR of heat load) and this usually equates to needing an oil cooler.
  • Wood Beaver hydraulics operate in Series, the first and most noticeable advantage being our speeds don’t change  whether you are operating one(1) function at a time or five (5) functions simultaneously, we’re not Flow Sharing. No time lost!
  • The next advantage is we have no need for flow regulators to ‘prioritize’ (restrict or slow down) flow so that some functions are guaranteed to get ‘some’ flow. Every function gets the full flow it needs to operate at full speed at all times.In some systems, you are wasting 10 horsepower (or more) by building heat instead of performance. This is why we can use smaller engines and pumps and achieve higher performance levels.
  • Operating in Series lets us control the Saw Bar down pressure, going thru the logs as fast and efficiently as possible. When you cut softer wood, the saw bar will travel at a faster rate, while cutting harder wood it will automatically adjust the rate – which saves chains and bars which is SAVING MONEY! The Competition use a flow control on their Saw bar, basically “guessing”how much pressure to push the saw bar thru the log, and “average” wood density. On hard wood using too much force, prematurely wearing out your chain and bar, or on soft wood, moving too slowly, wasting time.
  • So, what does this boil down to? Efficiency. This is not a drag race – it is about endurance. Inefficient hydraulics need more flow and more flow needs more horsepower – and that extra power and flow is making heat, not firewood. Because in series hydraulics are more efficient they require less horsepower to do the same job. Smaller engines, with more efficient hydraulics saves you fuel and time. Why would you want to run 10 to 20 more horsepower than you need?
  • When you see the system in operation, there really is no competition to a Wood Beaver. It’s all in the math… Higher efficiency + lower heat production + higher production speed = saving money + time + fuel = Wood Beaver Forestry.