This is my review on The Oilgear Company, one the best hydraulic companies in the United States with offices around the world. What is going on? Check out video below!
Hydraulic needle valves can be a low, medium, or high pressure needle valves, they all work under the same principles of restricting flow to the desire amount depending on your requirements. Many manufacturers may build their own system on how a needle valve might work internally. Here is one example on how a needle valve would work.