Chapter 9 Design of Hydraulic Transmission systems 9.1.5 Performance check for a hydraulic system designed 1.Checking of the system pressure loss The pressure loss includes frictional loss along the pipelines,local loss in the pipelines and to a less produced by the valve components.The pressure loss of along or local can be calculated from the involved expressions shown in Chapter 2,while the local loss of the valve components can be obtained from the product samples. When the practical flow rate g of a valve component doesn't equal the nominal flow rate gn =4p(9)月 (9-4) 16 Homepage List Upwards Dowrwards Retumn Exit Chapter 9 Design of Hydraulic Transmission systems 16 9.1.5 Performance check for a hydraulic system designed 1. Checking of the system pressure loss The pressure loss includes frictional loss along the pipelines, local loss in the pipelines and to a less produced by the valve components. The pressure loss of along or local can be calculated from the involved expressions shown in Chapter 2, while the local loss of the valve components can be obtained from the product samples. When the practical flow rate q of a valve component doesn’t equal the nominal flow rate n q 2 n n ( ) q p p q  =  （9-4）