How to Choose a High-Temperature Hot Oil Transfer Pump for Refining Projects
A 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, […]
Corrosion-Resistant Centrifugal Pumps for Green Coal Chemical Projects: Structure, Seals, and Materials
A corrosion-resistant centrifugal pump for green coal chemical projects must be chosen based on chemistry first. Coal gasification, coal liquefaction, methanol, dimethyl ether, coal-to-olefins, scrubbing, desulfurization, and wastewater duties can involve acids, alkalis, salts, trace solids, high temperatures, and pressure variations. Structure, mechanical seals, and materials must be specified together so the pump can resist corrosion […]
Auswahl von Umwälzpumpen für Maleinsäureanhydrid-Anlagen: Aufbau, Dichtungen und Werkstoffe
A molten salt circulation pump for a maleic anhydride unit should be selected from the salt temperature, flow, head, viscosity, density, heat-transfer arrangement, sealing method, and material compatibility. In the project data available for this duty, the heat transfer salt operates at approximately 260 to 300°C, with a design flow of about 8 to 12 […]
Auswahl von Ethylen-Speisepumpen: Aufbau, Gleitringdichtungen und Werkstoffe für den Einsatz bei niedrigen Temperaturen
An ethylene feed pump should be selected around vaporization risk, low temperature, suction performance, sealing, and material compatibility, not flow and head alone. For ethylene service, a vertical suspended bag pump can be a strong fit because its double-casing construction, low-temperature capability, and suction-focused first-stage design address the conditions that make light hydrocarbons difficult to […]
Wie man eine Kreiselpumpe für den Einsatz in korrosiven Chemikalien spezifiziert
A centrifugal pump for corrosive chemical service must be specified based on the fluid, temperature, pressure, flow, materials, sealing arrangement, and operating environment. Selecting by flow and head alone can create problems with corrosion, cavitation, mechanical seal life, or maintenance access. Longgang Pump produces BB, OH, and VS chemical centrifugal pumps for petrochemical, coal chemical, environmental-protection, and water-treatment […]
Auswahl von mehrstufigen Hochdruckpumpen für anspruchsvolle Anwendungen
A high pressure multistage pump should be selected from the required head, flow range, fluid condition, temperature, pressure class, and maintenance strategy. The main structural decision is often whether a segmented BB4 arrangement or a double-shell BB5 arrangement better suits the duty. Material compatibility, axial-force balance, bearing protection, and seal support then determine whether the […]
Kavitationsvermeidung bei Kreiselpumpen durch NPSH- und Laufraddesign für raue Industriebedingungen
Centrifugal pump cavitation prevention starts before commissioning. The reliable approach is to assess the actual NPSH margin, liquid vapor pressure, inlet geometry, rotor support, mechanical seal arrangement, and wetted materials as one selection problem. That matters in petrochemical, coal chemical, and low-temperature services because a pump can meet its flow and head duty while still […]
Auswahl von Kreiselpumpen gemäß API 610 für petrochemische Kohle-, Chemie- und Wasseraufbereitungssysteme
API 610 centrifugal pump selection should begin with the project duty, not a preferred model. The appropriate structure, mechanical seal system, and wetted materials change with the liquid, temperature, pressure, vapor pressure, solids content, layout, and maintenance requirements. Longgang Pump‘s BB, OH, and VS families provide different engineering answers for refinery, coal-chemical, water-treatment, utility, and […]
Auswahlmöglichkeiten für Ansaugsysteme von Kreiselpumpen bei Unterdruck und niedrigem NPSH-Wert
A centrifugal pump priming system is needed when the pump cannot remain fully flooded before start-up. Negative suction, long suction piping, high points in the line, volatile media, and low-NPSH conditions can all leave air or vapor in the casing. The right arrangement keeps liquid at the impeller eye, helps the pump establish flow quickly, […]
Ansaugprüfung von Kreiselpumpen für Hochtemperatur-Chemikalienanwendungen
Centrifugal pump priming removes air and vapor from the casing and suction line so the impeller starts with a continuous liquid column. In high-temperature chemical service, that simple step protects flow stability, mechanical seals, bearings, and the hydraulic surfaces that keep a process pump predictable. When priming is weak, the pump may spin without moving […]