Centrifugal Pumps for Oilfield LACT Applications

A LACT unit automatically measures, samples and transfers oil from a lease location into the oilfield into a pipeline, from where it is transferred to a terminal or end-user. Think of the LACT unit as a “cash register” between a company that is selling the oil and a company that is buying the oil.

A key to keeping LACT units—which can be stationary or skid-mounted—operating efficiently and reliably is the pump that transfers the oil from the owner’s transport or storage vessel into the buyer’s. Griswold’s 811 Series ANSI Centrifugal Pumps meet the challenges that can be associated with LACT operations because they are capable of completely transferring oil from a tanker to a client’s storage tank, as well as transloading product from a tanker to a railcar, all while performing reliably in any variety of extreme operating conditions.

Griswold’s 811 Series ANSI pumps satisfy the diverse needs of a LACT operation because they have been engineered for flexibility, efficiency and durability. They have two times the wear area between the case and impeller when compared to closed-impeller designs. The 811’s open-impeller design also minimizes concentrated wear by balancing the hydraulic thrust load and reducing stuffing-box pressure, which maximizes performance while simplifying maintenance, extending pump life and reducing repair costs.

The casing of an 811 Series pump can be constructed of ductile iron, CDM4Cu, Alloy 20 or stainless steel, while a no-bake casing process ensures smooth, precise, superior finishes. The pumps are available in a full range of sizes with flow rates up to 4,000 gpm (15,142 L/min) with the ability to operate in temperatures up to 500ºF (260ºC). Standard features include self-tightening impellers, the ability to externally adjust the pump’s clearance so that peak efficiency is maintained, and power frames that make the pumps an estimated 33% stronger than competitive models.