Tank Battery Circulation Rotary Lobe Pumps

Define the Purpose of the Circulation Loop

Identify whether the pump returns liquid to a tank, transfers it between vessels, or feeds a separator. Mixing and separation have different objectives; specify the required process result as well as the flow, since pump capacity alone does not establish whole-tank mixing performance.

Loop arrangement

Source, return, and operating cycle. Provide tank levels, suction and return locations, connected equipment, and continuous or batch operation.

Changing mixture

Oil, water, gas, and solids. State whether a percentage refers to water or oil, and its measurement basis. Include changes between normal circulation and tank-bottom withdrawal.

Oil-Water Mixtures & Separation Objectives

For separator feed, describe the existing emulsion behavior and the required downstream result. Assess pump speed and configuration alongside fluid composition, temperature, pressure, and the complete flow path rather than selecting from a general low-speed range.

Where preserving separation behavior matters, define how proposed equipment will be evaluated using representative fluid and agreed acceptance criteria. A rotary lobe pump designation alone does not establish lower emulsification, improved separation, or reduced demulsifier use.

Site Requirements & Package Documentation

Provide the site’s area-classification, electrical, material, and documentation requirements, including H2S exposure where present. These requirements belong in the review of the complete proposed package, alongside the hydraulic duty.

Confirm required certificates, equipment scope, and supporting records against the actual offer before ordering. A motor designation alone does not establish suitability of the pump package or installation.

Wax, Sediment, Startup & Seal Support

Describe wax deposition, settled sand, minimum startup temperature, and time at rest. Assess restart load and pressure protection against the actual fluid and loop; include heating or flushing arrangements where they are part of the site process.

Review wetted metals, elastomers, wear components, and the seal arrangement against the full fluid and cleaning chemistry. Confirm support, leakage monitoring, and maintenance access for the selected configuration rather than prescribing a single seal or a general drain arrangement.