reciprocatingpumpar

Reciprocatingpumpar, commonly referred to as reciprocating pumps, are positive-displacement pumps that move fluid by the back-and-forth motion of a piston, plunger, or diaphragm within a cylinder. Each stroke displaces a fixed volume, producing a pulsating flow and enabling high discharge pressures, especially at low to moderate speeds. They are used for viscous fluids, metering, and applications requiring accurate flow control. A typical reciprocating pump consists of a cylinder with a movable element (piston or plunger) connected to a drive mechanism, plus inlet and outlet valves. The pump can be configured as single-acting, discharging on one stroke, or double-acting, discharging on both strokes. Diaphragm pumps use a flexible membrane instead of a rigid piston, suitable for corrosive or delicate fluids.

Operation involves alternating suction and discharge cycles. On the suction stroke, the inlet valve opens and draws fluid into the cylinder; on the discharge stroke, the discharge valve opens and pushes fluid to the system. Valves and packing require regular maintenance to prevent leakage and ensure efficiency. The flow is pulsating, often mitigated by dampeners or multiple cylinders.

Applications include boiler feedwater, hydraulic systems, chemical processing, oil and gas, water treatment, and high-pressure cleaning. Compared with centrifugal pumps, reciprocating models provide higher pressures and better metering accuracy at low flows but tend to be more mechanically complex and require more maintenance.