V:Model--V15 V18 V23 V38 V50 V70 15:Displacement (refer to Specifications) A1:presurre Adj. Range (refer to specifications) R:Shaft Rotation (View from shaft end)  R:Colockwise  L : Anti-clockwise A:Control Types A,B,C,D,E,F,G,H  (refer to Control Types)