![\"Vertical](\"https:\/\/www.longgangpump.com\/wp-content\/uploads\/2026\/09\/Vertical-suspended-pump-arrangement-for-low-temperature-and-vapor-prone-process-liquids.jpg\")
<\/p>\nA high-temperature hot oil transfer pump must control heat, pressure, shaft movement, seal environment, and maintenance access at the same time. In refining and chemical integration projects, hot oil circulation can expose a centrifugal pump to thermal expansion, volatile hydrocarbons, heavy casing loads, and long continuous operation. The right selection starts with the duty point, then matches casing structure, seal arrangement, materials, bearings, and auxiliary cooling.<\/p>\n
Longgang Pump’s BB5, BB3, and BB2 pump families answer different parts of that problem. The choice is not about the largest pump. It is about the structure that best fits the liquid, temperature, pressure, inspection plan, and consequence of downtime.<\/p>\n
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Hot oil service looks simple because the liquid is already in a closed process loop. In practice, temperature changes can move clearances, change alignment, reduce lubricant life, stress gaskets, and make mechanical seals more sensitive. If the pump is underspecified, the failure often appears as vibration, leakage, bearing temperature rise, loss of efficiency, or repeated seal replacement.<\/p>\n
Refinery pumps also work inside tightly connected systems. A circulation pump may be tied to reactor heat balance, fractionation stability, heat exchanger performance, or startup and shutdown procedures. That is why the pump should be selected as part of a process system instead of as an isolated rotating machine.<\/p>\n
The LTD(BB5) double shell multi-stage centrifugal pump<\/b><\/u><\/strong><\/a>\u00a0is a horizontal, center-supported, double-casing, segmented multistage pump. Its stated range is about 5 to 1200 m3\/h in flow, up to about 3000 m in head, up to about 30 MPa in working pressure, and about -80 C to +450 C in temperature. Its external pressure shell uses forging technology, while the inner core is designed for removal without moving inlet and outlet pipelines.<\/p>\n That structure is valuable when hot oil service combines high pressure, high temperature, and major downtime consequences. The barrel-style outer casing is not a substitute for correct sealing and material selection, but it changes the pressure containment and maintenance strategy. The BB5 design also offers single-suction or double-suction first-stage impeller options according to the duty.<\/p>\n The LCD(BB3) horizontal split multi-stage centrifugal pump<\/b><\/u><\/strong><\/a>\u00a0is a horizontal, multistage, single-casing pump with an axial split structure and symmetric impeller arrangement. Its listed range includes flows of about 10 to 1500 m3\/h, head up to about 1600 m, working pressure up to about 25 MPa, and temperatures from about -60 C to +200 C.<\/p>\n BB3 design is especially relevant where engineers need multistage pressure with easier access to the rotor and internal components. The inlet and outlet flanges are arranged on the pump casing, allowing inspection and maintenance without moving the connected piping. Symmetrical impeller arrangement and upper-lower symmetrical volutes help reduce residual axial and radial forces.<\/p>\n Not every hot oil duty requires a multistage barrel pump. Longgang Pump’s LBD(BB2) radially split process pump is designed for high-temperature, high-pressure, and corrosive media. Its centerline mounting and dual-end support help prevent the pump center and driver center from shifting relative to one another as the casing expands.<\/p>\n For lower head but still severe hot process duties, BB2 may be reviewed alongside BB3 and BB5. The final choice should compare pressure-temperature envelope, hydraulic head, NPSH, seal plan, flange rating, rotor loads, and service access.<\/p>\n A high-temperature hot oil transfer pump usually needs more than a standard seal selection. The seal faces, elastomers or secondary seals, flush flow, cooling method, barrier or buffer system, and metallurgy must survive the process temperature and the startup cycle. A seal that works at ambient temperature may lose reliability when heat soak reaches the chamber, gland, piping, and support system.<\/p>\n For Longgang Pump’s BB3, BB5, OH, and VS families, the seal chamber and sealing system should be specified against API 682-related requirements where applicable. In hot hydrocarbon service, the seal plan should be chosen based on\u00a0the actual medium, vapor pressure, temperature, pressure, leakage tolerance, and plant standard.<\/p>\n Material selection must reflect temperature strength, corrosion, erosion, gasket compatibility, thermal cycling, and the behavior of any suspended fines. The casing, inner casing, impellers, shaft, sleeves, balance parts, wear rings, fasteners, and seal-contact parts all deserve attention. A high-temperature service can fail through thermal distortion even when the basic corrosion resistance seems acceptable.<\/p>\n Longgang Pump offers special-alloy material solutions for difficult corrosive media, while the BB5 and BB3 designs provide different pressure-bearing structures, bearing options, impeller arrangements, and flange classes. These should be matched to the actual refinery hot oil stream rather than treated as evidence that one material grade covers every service.<\/p>\nBB3 Horizontal Split Construction for Multistage Access<\/b><\/strong><\/h3>\n
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<\/p>\nBB2 Centerline Mounting for Hot Process Liquids<\/b><\/strong><\/h3>\n
Mechanical Seal Selection for Hot Hydrocarbon Service<\/b><\/strong><\/h2>\n
Material Selection for Hot Oil and Refinery Fluids<\/b><\/strong><\/h2>\n
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<\/p>\nWhat the Yulong Refining Project Shows<\/b><\/strong><\/h2>\n