Introduction︰

YH seriss of Diaphragm vaccus pump is a new type with excellent funcions and high quality after improvement on the basis of learning merits and eliminating shortcoming of similar products at home and abroad,this pump can be widely used in experiments of vacuum filtration,rotary evaporator,refrigeration,dryness,vacuum concentration and molecular distillation,the line products are elaborately designed,having low noise,running smoothly,and the max vacuum value reaching 700Kpa,In addition.these pumps have storng pump power and anticorrosive housing as well as remain reliable and safe.