Single screw pumps are named as PC pumps otherwise progressive cavity pumps, and worm Pumps. Generally, these types of pumps are not considered within the family of the screw-pump. Because the rotor in these pumps are not like a usual screw but somewhat a twisted round shaft. A progressive cavity pump includes one shaft with somewhat twisted within the form of a screw, & is enclosed within a pumping hall that is generally rubber lined.Single screw pump has wide application, it can transfer all flowing medium and non-running material with different pump speed with different material. As an experienced China screw pumps manufacturer, Hoffwell Pump will provice a good slution with good quality pump. Please feel free to contact me to get a good quotation.