Positive Displacement Pumps
Source positive displacement pumps from India's verified manufacturers and exporters on Himalay. Browse the full range for industrial and export applications.
About Positive Displacement Pumps
Positive displacement (PD) pumps move a fixed volume of fluid per cycle by trapping it in a chamber and forcing it to the discharge, which makes flow largely independent of discharge pressure. They suit viscous, shear-sensitive, metering and high-pressure low-flow duties where centrifugal pumps lose efficiency, and they are widely specified across chemical dosing, lubrication, hydraulic power and oil-and-gas transfer service. Rotary variants include gear (external and internal), screw (twin and triple), lobe, vane and progressive-cavity pumps; reciprocating variants include piston, plunger and diaphragm pumps, with API 674 and API 675 commonly referenced for reciprocating and controlled-volume metering designs in process plants. Typical selection parameters are capacity, differential pressure, viscosity range, NPSH available and slip, and because flow is volumetric these pumps usually require relief or bypass protection against deadheading. Many configurations support self-priming and run-dry tolerance depending on family, which influences pump-room layout and control. Wetted materials generally span cast iron, ductile iron, carbon and stainless steel (CF8M / 316), duplex, bronze and engineered polymers, with hardened rotors, tungsten-carbide or silicon-carbide mechanical seals, and elastomer or PTFE diaphragms selected for the medium. Construction usually follows the relevant API or ISO design intent, with hydrostatic casing tests, performance and slip verification, and seal-flush plans documented per order. Through Himalay, partner manufacturers can supply material traceability with EN 10204 3.1 certificates where specified, witnessed performance and hydrostatic test reports, NACE MR0175 metallurgy for sour service, and PED-CE or SABER conformity routes for EU and GCC import; certification, inspection and CIF logistics are coordinated as part of the standard order flow.
