Jiangsu Haifa Machinery Manufacturing Co., Ltd.

The BB5 pump is a barrel-type multistage centrifugal pumping to the API 610 standard, with a flow rate ranging from 5 m³/h to  m³/h, head of up to 3400 m, a design pressure of 45, and an operating temperature of 450°C. It is used in oil refining,rochemical, coal chemical, fertilizer, power generation, and high-pressure delivery systems, characterized by high pressure, high speed, complex structure, and high assembly precision requirements. Compared with ordinary single-stage pumps, the maintenance of BB5 pumps involves not only the simple replacement of wearing parts but also multiple aspects such as rotor balancing, inter-stage seal clearance, axial thrust control, barrel sealing, bearing system, mechanical seal system, and overall performance restoration.

Our company possesses the capabilities for inspection, reverse engineering, repair, modification, and spare parts manufacturing of BB5 pumps. We can systematically analyze issues encountered on-site, such as increased vibration, abnormal bearing temperature, mechanical seal leakage, reduced flow and head, decreased efficiency, rotor wear, balance disc failure, and-stage leakage. Before repair, we conduct a comprehensive disassembly inspection of the pump casing, rotor, impeller, diffuser, inter-stage bushings, balancing mechanism, shaft sleeves, bearing housing, and seal chamber to determine the root cause of, rather than simply replacing parts.

In terms of core component, our company can perform dynamic balancing verification on the BB5 pump rotor assembly and repair or remanufacture worn journals, shaft sleeves, wear rings, inter-stage seal rings, discs, and balance drums. For flow-passing components damaged by corrosion, erosion, or cavitation, we canlect materials or optimize surface treatment solutions based on the medium conditions to enhance wear resistance, corrosion resistance, and erosion resistance. Additionally, we can perform reverse engineering based on the original pump dimensions to localized replacement of non-standard parts, reducing the long lead times and high associated with imported parts.

In terms of assembly and quality, the focus of BB5 pump repair is to ensure concentricity, rotor axial clearance, inter-stage gaps, bearing clearances, and seal installation dimensions. During assembly, we strictly control critical fit dimensions to ensure rotor operation and minimize the risk of vibration and friction under high-pressure conditions. For the mechanical seal system, we can configure API flushing plans based on on-site operating conditions, such as 11, Plan 21, Plan 23, 52, and Plan 53, to improve seal operational reliability.

Overall, our company's maintenance capabilities for BB5 pumps extend beyond disassembly and repair to include fault diagnosis, spare parts reverse engineering, material optimization, rotor repair (including dynamic balancing testing at 6000 r/min), seal modification, and overall performance restoration. Through systematic maintenance, we help users reduce downtime, equipment operating cycles, and enhance the safety and stability of critical high-pressure pumps.

Jiangsu Haifa Machinery Manufacturing Co., Ltd. was restructured from Jiangsu Ligong Group Co., Ltd., the Jingjiang Stainless Steel Pump and Valve Factory of the Iron and Steel Research Institute of the Ministry of Metallurgical Industry, established in 1958. The company primarily manufactures API 610 chemical process pumps - OH1, OH2, OH3, OH pumps, BB1, BB2, BB3,4, BB5 double-casing multistage pumps, VS1 VS4, VS5, VS6 barrel pumps, HES chemical process pumps, chemical pumps, petrochemical pumps, sixth-generation ultra-low carbon stainless steel high-quality leak-proof molten urea pumps, hydrolyzer feed pumps, high-temperature asphalt pumps, pitot tube pumps, rotary jet pumps, low-flow high-head pumps, multistage vortex pumps high-temperature molten salt pumps, high-temperature nitric acid pumps, vertical sump pumps, magnetic drive pumps, low-temperature liquid hydrogen and methanol pumps, high-pressure liquid hydrogen pumps,-temperature pumps, high-temperature nitric acid magnetic pumps, magnetic drive pumps for conveying solid-containing media, industrial pumps, canned motor pumps, slurry pumps, titanium tetrachloride pumps self-priming pumps,FE-lined pumps, PTFE-lined pumps, leak-proof pumps, desulfurization and denitrification pumps, pumps, pumps, geothermal pumps, oil pumps, axial flow pumps, printing and dyeing pumps, dyeing and finishing pumps, titanium alloy pumps, C-276 material, Hastelloy 316L material 347 material, forced circulation pumps, fourth-generation nuclear pumps, nuclear island pumps, filter press dedicated pumps, refrigerant pumps, long-shaft vertical sump pumps, CQC first-class energy efficiency chemical pumps, high-pressure descaling industrial pumps, and Chinese chemical pumps. Website: www.jslgpump.com. Contact number: 13905263417. E-mail: jslgpump@gmail.com E-mail: jsareva@163.com.