DYG-50 hydraulic jacks can be used for heavy machinery, bridge engineering, water conservancy, port construction and other industries in the use of lifting equipment. The speed and pump hydraulic jack has a close relationship, then the relationship between them is how to realize it specific, detailed below, and Xiaobian look at it together. First we need to understand two parameters: one which cavity volume hydraulic jacks (that is, the need for lifting hydraulic jack oil), the second is a high-pressure pump flow and low flow (the premise is that we are using a variable column piston pump), then we can load according to the needs of oil and hydraulic jacks to calculate the flow rate of the hydraulic jack lifting speed and the rate of decline. Relationship between the two: Under normal circumstances, hydraulic jacks jacking faster than the rate of decline after unloading slower, because the work load when hydraulic jacks at work mainly in the high-pressure, low pressure just at the beginning of work, then pressure on intervention, while unloading return to work when it is high and low, so the rate of decline than jacking speed. More product information about hydraulic jacks, please log www.jstzhl.com inspection.