By adding a diaphragm chamber to the reciprocating positive displacement pump, a large-sized diaphragm separates the pump's fluid end from the power end. This design achieves high flow rates, high working pressures, and minimal pulsation, enabling leak-free transportation of flammable, explosive, toxic, and hazardous liquids. The product complies with Chinese National Standard GB/T9234-2018, Mechanical Industry Standard JB/T8697-2014, and international API674 standard.