{"id":4037,"date":"2026-07-17T08:50:32","date_gmt":"2026-07-17T00:50:32","guid":{"rendered":"https:\/\/www.longgangpump.com\/?p=4037"},"modified":"2026-07-16T10:22:39","modified_gmt":"2026-07-16T02:22:39","slug":"mastery-of-the-pump-priming-process-for-flawless-refinery-start-ups","status":"publish","type":"post","link":"https:\/\/www.longgangpump.com\/ru\/news\/mastery-of-the-pump-priming-process-for-flawless-refinery-start-ups\/","title":{"rendered":"Mastery of the Pump Priming Process for Flawless Refinery Start-ups"},"content":{"rendered":"

\"the<\/p>\n

The commissioning phase of a refinery represents one of the most critical windows in the lifecycle of petrochemical infrastructure. During this period, the reliability of rotating equipment determines the long-term operational stability and safety of the entire facility. Among the various technical requirements, the pump priming process stands as a fundamental prerequisite for successful machine initiation. Failure to ensure a completely liquid-filled environment within the pump casing prior to the rotation of the impeller can lead to immediate mechanical damage, ranging from seal degradation to catastrophic shaft seizure. This guide explores the intricate relationship between proper priming and industrial reliability, highlighting how precision engineering and rigorous operational protocols facilitate flawless start-ups in high-pressure and high-temperature environments.<\/p>\n

What is the Vital Function of a Centrifugal Pump in Modern Petrochemical Hubs?<\/b><\/strong><\/h2>\n

\"LTD(BB5)-Double<\/p>\n

Beyond Simple Fluid Transport<\/strong><\/h3>\n

In modern refining complexes, pumps are far more than simple conduits for fluid; they function as the circulatory heart of the plant. A high-performance pump must maintain precise flow rates and discharge pressures to satisfy the requirements of heat exchangers, reactors, and distillation columns. The core function of centrifugal pump systems is to convert mechanical energy from a driver into kinetic and pressure energy in the fluid. This conversion is highly dependent on the hydraulic integrity of the system, which is compromised if air or vapor is present within the impeller stages.<\/p>\n

Analyzing the Function of Centrifugal Pump in High-Temperature Feed Streams<\/b><\/strong><\/h3>\n

High-temperature feed oil circulation represents one of the most demanding centrifugal pump applications in industry. In the Yulong Island Refining and Chemical Integration Project, specialized units like the LTD series with a BB5 lined BB3 structure are employed to transport hot oil. The primary function of centrifugal pump designs in these scenarios is to handle thermal expansion while maintaining a tight hydraulic seal. These double-shell multi-stage pumps, such as the LTD series from Longgang Pump<\/b><\/u><\/strong><\/a>, are engineered to withstand extreme thermal gradients, ensuring that the feed stream remains consistent and the refinery process stays within safe pressure parameters.<\/p>\n

Why Hydraulic Efficiency Starts with a Full Casing<\/b><\/strong><\/h3>\n

Hydraulic efficiency is a direct result of the pressure differential created by the rotating impeller. If the casing contains air, the low density of the gas prevents the generation of sufficient centrifugal force to move the liquid and create the necessary vacuum at the suction eye. Consequently, the pump fails to prime, and the energy from the motor is dissipated as heat within the trapped air pockets. Ensuring that the pump is fully submerged or primed is the only way to achieve the rated performance levels and avoid the energy losses associated with vapor lock or cavitation.<\/p>\n

How to Execute Flawless Centrifugal Pump Applications in Industry?<\/b><\/strong><\/h2>\n

Specialized Priming for Vertical Suspended Pumps<\/b><\/strong><\/h3>\n

\"LDTV(VS1)-Vertical<\/p>\n

Vertical pumps, such as the LDTV (VS1)<\/b><\/u><\/strong><\/a>\u00a0or LDT (VS6) series, require specific priming considerations due to their submerged nature. In these centrifugal pump applications in industry, the pump priming process often relies on the natural submergence of the first-stage impeller. However, for media prone to vaporization, a balance pipeline is connected from the balance chamber to the outlet of the first-stage impeller. This configuration ensures that the chamber maintains at least the head pressure of the first stage, effectively preventing the formation of gas pockets that could compromise the submerged sliding bearings or the mechanical seal.<\/p>\n

Optimizing Start-ups for High-Pressure Self-Balancing Systems<\/b><\/strong><\/h3>\n

High-pressure boiler feed water systems, such as the one implemented at the Qingdao Refinery, utilize self-balancing multi-stage pumps. The pump priming process for these units is integrated with the high-pressure self-balancing mechanism to ensure that the drum-disk-drum combined action is active as soon as the pump reaches operational speed. By ensuring the pump is completely filled with water, the axial forces are fully balanced during the initial ramp-up, protecting the thrust bearings from the massive loads typical of high-energy feed systems.<\/p>\n

Dealing with Easy-to-Vaporize Media<\/b><\/strong><\/h3>\n

To enhance suction performance under strict cavitation conditions, advanced centrifugal pump applications in industry often incorporate an inducer wheel structure. Located at the impeller inlet, the inducer wheel adds a small amount of head to the fluid before it enters the main impeller, significantly improving the Net Positive Suction Head Required. This design is particularly critical for the LDT (VS6) pumps used in ethylene product transfer at the Sinopec Tianjin Branch, where maintaining a liquid state throughout the priming and startup sequence is essential for equipment safety.<\/p>\n

How Advanced Engineering Simplifies the Pump Priming Process?<\/b><\/strong><\/h2>\n

Innovations in BB5 Double-Shell Multi-Stage Designs<\/b><\/strong><\/h3>\n

The LTD (BB5) series represents the pinnacle of refinery pump technology. These double-casing pumps feature an externally pressurized shell made from high-strength forgings. One of the most significant engineering advantages is the inner core removal feature. This allows the entire rotor assembly to be inspected or maintained without disconnecting the inlet or outlet piping. When it comes to the pump priming process, this design ensures that the internal clearances are perfectly aligned, reducing the risk of internal rubbing during the critical seconds of a first-time start-up.<\/p>\n

Self-Balancing Structures and Their Impact on Startup Stability<\/b><\/strong><\/h3>\n

A landmark achievement in domestic pump technology is the CO2 booster pump developed for the Qilu Petrochemical CCUS Project. This project involved transporting dense-phase carbon dioxide at pressures of 10.0 MPa. The function of centrifugal pump units in this application is made possible by a self-balancing structural form and an embedded honeycomb ring structure. These innovations solve the issues of poor stability and low lubricity inherent in liquid CO2, ensuring that the pump priming process and subsequent operation remain efficient and reliable even at international leading performance levels.<\/p>\n

Digital Simulation in Ensuring Priming Success<\/b><\/strong><\/h3>\n

Modern manufacturing at Longgang Pump leverages three-dimensional design and Computational Fluid Dynamics simulation to mitigate performance risks. By simulating internal flow patterns and pressure fields, potential areas of air entrapment can be identified before the pump is even cast. This digital validation ensures that the venting and priming ports are optimally located, guaranteeing that the pump priming process will be effective across all operating conditions. Furthermore, 3D laser printing technology allows for rapid experimental validation of these hydraulic models, ensuring that the function of centrifugal pump systems meets the specific gravity and viscosity requirements of the refinery’s most challenging media.<\/p>\n

Conclusion<\/b><\/strong><\/h2>\n

Mastering the pump priming process is not merely a task for the maintenance crew; it is a critical engineering requirement that bridges the gap between a successful installation and a high-performing asset. From the high-temperature feed oil pumps at Yulong Island to the groundbreaking CO2 booster systems at Qilu Petrochemical, the reliability of centrifugal pump applications in industry depends on the initial presence of fluid within the casing. By selecting advanced equipment like the LTD (BB5) or LDT (VS6) series from Longgang Pump, refinery operators gain access to mature solutions designed for stability, efficiency, and long-term durability.<\/p>\n

For customized pump selection and comprehensive operational training, please contact us<\/b><\/u><\/strong><\/a>.<\/p>\n

FAQ<\/b><\/strong><\/h2>\n

Q: <\/b><\/strong>Does the pump priming process vary between horizontal and vertical Longgang Pump models?<\/b><\/strong><\/h3>\n

A: The pump priming process for horizontal pumps typically involves venting air from the top of the casing through specialized vent valves, whereas vertical suspended pumps like the LDTV (VS1) often rely on their insertion depth and natural submergence. For vertical models handling vaporizing media, Longgang Pump utilizes balance pipelines to ensure the seal chamber remains pressurized and liquid-filled.<\/p>\n

Q: <\/b><\/strong>What is the primary function of centrifugal pump systems during a refinery emergency shutdown?<\/b><\/strong><\/h3>\n

A: The primary function of centrifugal pump systems during an emergency is to maintain a safe flow of cooling or quench fluids to prevent thermal runaway in reactors. Ensuring these pumps remain primed and ready for immediate restart is a critical component of refinery safety protocols.<\/p>\n

Q: <\/b><\/strong>Why does Longgang Pump recommend double-shell BB5 structures for high-pressure feed oil?<\/b><\/strong><\/h3>\n

A: Longgang Pump recommends the BB5 structure because the double-shell design provides an extra layer of safety for high-pressure, high-temperature fluids. Furthermore, the inner core can be removed for maintenance without disturbing the main piping, making it easier to verify the internal condition and ensure a successful pump priming process after repairs.<\/p>","protected":false},"excerpt":{"rendered":"

The commissioning phase of a refinery represents one of the most critical windows in the lifecycle of petrochemical infrastructure. During this period, the reliability of rotating equipment determines the long-term operational stability and safety of the entire facility. Among the various technical requirements, the pump priming process stands as a fundamental prerequisite for successful machine […]<\/p>\n","protected":false},"author":2,"featured_media":4038,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4037","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/posts\/4037","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/comments?post=4037"}],"version-history":[{"count":2,"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/posts\/4037\/revisions"}],"predecessor-version":[{"id":4046,"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/posts\/4037\/revisions\/4046"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/media\/4038"}],"wp:attachment":[{"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/media?parent=4037"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/categories?post=4037"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.longgangpump.com\/ru\/wp-json\/wp\/v2\/tags?post=4037"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}