Abstract
The relation between lift and spring elasticity and volumetric efficiency of the flat valve for use of suction and discharge of power sprayer was examined, and the condition of the movement of valve was observed with photographing and discussed.
The results were as follows:
1) Maximum limit of lift was in 0.25-0.3d (d: diameter of valve seat), and spring was the stronger, the efficieney was the better.
2) Spring elasticity was the stronger and r. p. m was the fewer, the practical lift of valve the fewer, and the lift did not always show the full rising and falling.
3) The valve rose and fell in the inclined carriage to the valve seat. This inclination was especially large at the valve without stem guide.
