Within an Abrasive Slurry Delivery System, the diaphragm or peristaltic pump is a critical component responsible for the controlled, pulsation-free transfer of abrasive slurry mixtures. It ensures consistent flow rates and pressure to downstream application points, such as cutting or polishing heads, while protecting the pump mechanism from the damaging effects of abrasive particles. The pump is available in two principal designs: diaphragm pumps, which use a flexible diaphragm actuated by a reciprocating mechanism to isolate the abrasive fluid from drive components, and peristaltic pumps, which use rotating rollers to compress a flexible tube, creating a moving occlusion that pushes the fluid forward. Both designs are selected based on system requirements, including flow rate, operating pressure, particle size, and chemical compatibility. The pump is typically constructed with a stainless steel housing, PTFE or ETFE diaphragms, and reinforced rubber or silicone tubes for peristaltic models. Key parameters to consider when specifying this component include flow rate (0.1–50 L/min), operating pressure (0.1–0.8 MPa), maximum particle size (0.5–5 mm), metering accuracy (±0.5%), motor power (0.25–7.5 kW), supply voltage (220–480 V AC), operating temperature (-20 to 80 °C), ingress protection (IP54–IP65), diaphragm material (PTFE, EPDM, NBR), and weight (15–120 kg). These values are reference ranges and must be verified against the specific model and application. Relevant standards for verification include ISO 9906 for flow rate, IEC 60034 for motor power, IEC 60038 for voltage, and IEC 60529 for ingress protection. Always confirm model-specific values and compliance with the legal manufacturer or supplier before procurement.
A diaphragm pump uses a flexible diaphragm actuated by a reciprocating mechanism to create a pumping action, isolating the abrasive fluid from the drive components. A peristaltic pump uses rotating rollers to compress a flexible tube, creating a moving occlusion that pushes the fluid forward, with the tube acting as both the fluid path and the wear part.
