This standard specifies the basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of diaphragm pumps. This standard is applicable to motorized hydraulic diaphragm pumps that transport media with a temperature of 5 to 120°C, a viscosity of 0.3 to 850 mm^(2)/s, a particle size of ≤8 mm, and a concentration of ≤75%. Its rated flow range is ≤630 m^(3)/h; its rated discharge pressure range is ≤25 MPa.