Lower control system regulating the flow rate of lifting jack oil

摘要: A lower control system serves to regulat the flow rate of lifting jack oil, and is installed between a reverse valve an inner oil chamber, regulates from chamber outer chamber. The comprises body, steel ball, spring, throttle body. body has tapered portion, formed at its front end, least one throttling slot way lateral way, respectively on portion circumferential wall thereof. When not loaded, can lift ball so that swiftly flows by through ways complete flow. gently ways, leading reduction slower descending jack.