The oil content of peony seed is 20%~28%.The extraction methods are traditional pressing method and subcritical low temperature extraction method.
　　The oil yield of the pressing method is low,the content of impurities is high,and the high temperature is formed in the extrusion process,which destroys the unsaturated fatty acids and trace active substances with medicinal value in the oil.The low-temperature extraction of the subcritical peony seed oil equipment uses butane solvent,room temperature and 0.4MPa pressure to extract the peony seed oil,and the technological process is as follows:
　　Peony seed→impurity removal→hulling→tempering→rolling→low temperature subcritical extraction→peony seed crude oil→refining→peony seed essential oil

The peony seed                                           The peony pod