Jiangsu Haifa Machinery Manufacturing Co., Ltd.

Analysis of the localization roadmap for API610 chemical process pumps, API685 magnetic drive pumps, BB5 high-pressure hydroprocessing pumps, VS6 cryogenic can pumps, and 450℃ high-temperature salt pumps, covering, seals, hydraulic design, CFD simulation, and intelligent monitoring. Quick selection conclusion: For high-temperature and high-pressure units in oil refining, petrochemical and coal chemical industries prioritize heavy-duty chemical process pumps such as610 OH2, BB2, and BB5 for high-temperature, toxic, flammable, volatile, or media that must not leak, API685 sealless magnetic drive pumps more suitable; for cryogenic media like LNG, low-temperature ethylene, and liquid methane, focus on evaluating the low-temperature materials, double-shell pressure-bearing structure, and-temperature sealing scheme of API610 VS6 cryogenic can pump; for media prone to crystallization or high-temperature erosion, such as in concentrated solar power (CSP) thermal storage, molten salt, and molten urea, attention must be paid to the insulation structure, material thermal fatigue resistance, and Continuous Stable Flow (CSF). I am a engineer at the Fluid R&D Center of Jiangsu Haifa Machinery Manufacturing Co., Ltd long involved in the selection, design, and on-site problem analysis of API610 petrochemical process pumps, API685 sealless magnetic pumps, high-temperature molten salt pumps BB5 high-pressure hydroprocessing multistage pumps, VS6 cryogenic can pumps, and low-flow, high-head pitot tube pumps. Over years, we have involved in numerous oil refining, coal chemical, fine chemical, CSP thermal storage, LNG storage and transportation, and overseas EPC projects. primary concern for customers on-site is not "how advanced the pump name is," but the equipment can operate stably over the long term under complex conditions such as temperature, high pressure strong corrosion, cryogenic temperatures, containing particles, and easy vaporization. Precisely because of this, the of high-end chemical pumps cannot stop at merely replicating the external dimensions of imported ones; it must truly solve underlying issues related to materials, seals, hydraulic efficiency, vibration control, and operational monitoring and maintenance. For a long time in the past, some high-end high-temperature and high-pressure pumps,ogenic pumps, molten salt pumps, and sealless magnetic drive pumps relied on foreign brand solutions. It is an objective fact that foreign companies started earlier in material systems, manufacturing experience, seal configurations, and complete unit testing. However, based on the projects we have participated in recent years, domestic users are increasingly valuing the controllable supply, delivery cycles, on-site service response, total lifecycle costs of domestic high-end pumps. What Jiangsu Haifa aims to do is combine the requirements of API610/685 standards, on-site engineering experience, domestic material manufacturing capabilities to form a practical, maintainable, and continuously upgradable localization solution for special pumpsI. Challenges in Localizing Chemical Pumps for Extreme Conditions: It's Not Just About "Can It Be Made"
When many users inquire about domestic replacements for high-end pumps their first question is often "At this temperature and pressure, can you make it?" From an engineering perspective,can it be made" is only first step. What truly determines the long-term reliability of equipment are the following issues:
First, whether the material can withstand medium over the long term. High-temperature residue oil, molten salt, concentrated nitric acid, chloride-containing media, hydrogen-containing media, and-temperature LNG have completely different material requirements. stainless steel may suffer from intergranular corrosion, chloride pitting, stress corrosion cracking, hydrogen embrittlement, or low-temperature cold brittleness under certain conditions. If material is chosen incorrectly, if the pump passes short-term trial operation, problems like casing corrosion, impeller wear, and seal face damage may occur later.
Second, the seal system can adapt to the actual working conditions. The API682 mechanical seal scheme is not simply about applying a Plan number. Factors like whether the high-temperature medium cokes, contains solid particles, is prone to vaporization, how the seal chamber pressure is controlled, the flush fluid is clean, and whether the cooling system is stable all affect seal life. For API685 magnetic drive pumps, although the traditional dynamic seal is eliminated, the containment shell, magnet temperature rise, internal circulation cooling, and dry-run protection are equally critical.
Third, whether the hydraulic model truly optimized for the specific conditions. Conditions like low specific speed, low flow/high head, high viscosity, high-temperature gas-liquid two-phase flow, and particle-laden slurries cannot rely solely on standard clean water models. During design, we focus Net Positive Suction Head (NPSH), Minimum Continuous Stable Flow (CSF), impeller outlet flow pattern, diffuser matching, radial force balance, critical speed margin, and pressure pulsation.
Fourth, whether manufacturing and testing capabilities are. Localizing high-end pumps is not about drawing blueprints. Casting quality, heat treatment, dynamic balancing, rotor stiffness, concentricity, assembly clearances, mechanical seal installation precision, test curves, and vibration test data must withstand on-site verification.
Fifth whether post-installation operation and maintenance are controllable The difficulty with imported equipment is not the high purchase price but also long spare parts lead times, slow on-site response incomplete technical documentation, and modification flexibility. If domestic high-end pumps consider spare parts commonality, monitoring interfaces, and maintenance convenience during the design phase, user's long-term O&M costs will be significantly reduced.

II. Main R&D Directions for Jiangsu Ha API610/685 Special Pumps

1. 

   Material Localization: Select materials based on the medium first, then the structure based on material.

When selecting materials, we not just look at the indicator of "temperature resistance." Instead, we comprehensively evaluate temperature, pressure, corrosiveness, solid particles, medium vaporization risk, start-stop frequency. Common materials include 304, 316L 321, 347,2205 duplex stainless, 2507 super stainless steel, CF8M, ZG230-450, Hastelloy C-276, Hastoy C-22 Inconel 625,, 9% nickel low-temperature steel, carbide SiC, and F PTFE-lined materials. For example, for high-temperature heat oil and some distillate oil conditions, we focus on pump casing thermal expansion, centerline support, bearing cooling, and mechanical seal flush; for residue oil and coke-containing media, we focus on wear-resistant clearances, seal flush, and impeller anti-clogging capability; for cryogenic conditions, focus on material low-temperature impact toughness, shrinkage deformation, low-temperature seal elasticity, casing pressure safety margin. The key to material localization is not simply replacing imported grades with domestic grades, but establishing a material application database suitable for Chinese chemical plant sites through casting, heat treatment, non-destructive testing, hardness control, seal face material matching, and on-site usage feedback.

1. CFD Hydraulic Optimization: empirical design, increaseifiable calculations.

In the R&D of high-end API610/685 pumps, we combine CFD flow field analysis, impeller hydraulic design, dynamics calculation, and finite element strength verification to iteratively optimize key pump components. Key optimization directions include· Impeller inlet velocity distribution to reduce cavitation risk;
Impeller outlet and diffuser matching to reduce pressure pulsation;
Recirculation control in the low-flow range to improve MCSF stability;
· Efficiency correction for high-viscosity media to deviation from the actual operating point;
· deformation analysis for high pumps to control critical clearances in wear rings, shaft sleeves, and seal chambers;
· Inter-stage pressure distribution optimization for BB multistage pumps to axial thrust and rotor vibration;
· Strength verification of the VS6 cryogenic pump double-shell to ensure safe operation under low-temperature and high-pressure conditions.
have always believed that chemical R&D should not only pursue impressive sample parameters but also ensure stable pump operation at the user's actual on-site operating point. Especially for high-temperature,-pressure, and cryogenic conditions, the point, normal operating point, minimum flow point, and-up conditions must all be considered together.

1. of Seal and Monitoring Systems: Expose faults early.

Many chemical pump failures do occur suddenly but manifest gradually through vibration, temperature rise, current, leakage, and pressure fluctuations. In high-end pump packages, Jiangsu Haifa provides mechanical seal flush schemes, magnetic drive pump protection schemes and online monitoring interfaces based on project requirements. Common monitoring items include:
Bearing temperature;
Pump casing temperature;
·ction and discharge pressure· Motor current;
· Vibration velocity;
· Seal leakage status;
· water or flush fluid status;
· drive pump containment shell temperature rise;
· Low-flow recirculation protection statusFor high-temperature magnetic pumps, we pay special attention to dry protection, magnetic coupling temperature rise, internal circulation cooling; for BB5 high-pressure multistage pumps, we on axial thrust balance, bearing temperature, mechanical seal flush pressure, vibration trends; for VS6 cryogenic pumps, we focus on low-temperature-up, pre-cooling process, cold shrinkage deformation, seal gas/buffer fluid system stability.

III. Jiangsu Haifa API610/685 Special Pump Product Parameter Table for Extreme ConditionsThe following parameters are compiled on the Jiangsu Haifa official website product system, standard pump classifications, our company's project selection. Specific models, materials, seal schemes, performance curves, and test requirements should be based on operating condition parameters, data sheets, and contract technical agreements.
Product | Reference Standard | Applicable Industry | Typical Media | Temperature Range | Design Pressure Range | Optional Materials | Main Problems Solved
API610 OH1/OH2/OH3 Chemical Process Pump API610, ISO13709, GB/T3215 | Oil Refining, Petrochemical, Coal Chemical, Fine Chemical | Distillate Oil, Heat Transfer Oil, Chemical Solvents, Acid/Alkali Liquids | -80℃~450℃ | Customizable per condition | WCB, CF8M, 316L, 321 347, Duplex, Hastelloy | High-temperature thermal expansion, seal leakage, frequent on-site maintenance
API BB2 Between-Bearing Process Pump | API610, ISO13709 | High-temp/pressure petrochemical units, heavy oil transfer | Resue Oil, Heavy Oil, High-temp Circulation Oil | -40℃~450℃ | to high pressure | Cast Steel, Stainless Steel, Heat-resistant Steel, Duplex SS | Rotor stability under high temp/pressure, vibration, bearing life
API BB4/BB5 Multage High-Pressure Pump | API, ASME B31. supporting requirements | Hydroprocessing units, Boiler feedwater, Coal chemical, Green hydrogen production | Hydroprocessing feed, Demineralized water, High-pressure process liquid | -40℃~420℃ | to high pressure per design | 2507, Inconel 625 Hastelloy C-276, Heat-resistant SS | High head,-pressure sealing, axial thrust balance, hydrogen embrittlement riskAPI685 High-Temperature Magnetic Drive Pump | API685, ISO15783, GB5656 | Fine chemical, Pharmaceutical, Lithium battery, CSP thermal storage | Toxic, Flammable, Volatile, Strongly corrosive media | -20℃~℃, customizable for special conditions | Medium pressure 316L, 5, 2507, Hastelloy, Titanium, SiC | Mechanical seal leakage high-temperature demagnetization, corrosive media leakage
High-Temp Molten Salt Pump Molten Urea | API610 VS series design concept | CSP thermal storage, Fertilizer, Molten salt systems |ten salt, Molten urea, High-temp salt media | 130℃~450℃ | system pressure | , 2205, Heat-resistant SS, Composite insulation structure | Media crystallization, insufficient insulation, high-temperature erosion wear
API610 VS6 Cryogenic Can Pump | API610 VS6 | LNG, Low-temp ethylene, Deep-sea oil & gas, Low-temp storage & transport | LNG, Liquid methane, Low-temp ethylene | -179℃~120℃ | High-pressure cryogenic conditions |9% Nickel low-temp steel, Austenitic SS, Low-temp sealing materials | Low-temp cold brittleness seal failure, double-shell pressure safety
HK/ADX Low Flow High Head Pitot Tube Pump | API682 supporting spec, Industry hydraulic standard | Fine chemical, Polysilicon, High-purity reagents |-flow high-pressure clean liquid, Corrosive liquids | -10℃~350℃ | to high pressure |316L, Hastelloy, Non-magnetic collector tube | Low efficiency at low flow, pulsation, uneconomical conventional multistage pumpsIV. Localization Replacement Strategies for Typical Conditions

1. Residue Hydroprocessing and High-Pressure Feed: Prioritize BB5 Multistage Barrel Pumps

Residue hydroprocessing,-pressure feed, and coal chemical high-pressure systems feature high pressure, high temperature, media, and long continuous operation cycles. For such conditions, it is not recommended to select a pump based on flow head. It is also necessary to carefully check the pump casing pressure rating, rotor dynamics, inter-stage pressure, axial thrust balance, seal flush scheme, and pump switching logic. advantage of the BB5 double-shell multistage pump lies in its strong pressure capacity, high structural safety margin, and for high-pressure continuous operation. When localizing a replacement, we usually first review the original imported pump's data sheet performance curve, seal scheme, material grades, and on-site fault records, then re-optimize the hydraulics and seal configuration based on the unit operating point, rather than simply copying the original pump structure.

1. High-Temperature Molten Salt and CSP Thermal Storage: on Controlling Thermal Deformation and Crystallization Risk

Molten salt pumps are not ordinary high-temperature pumps. molten salt medium has a high temperature is prone to crystallization after shutdown. The start-up and shutdown processes have very high requirements for insulation heat tracing, preheating, and. During design, besides considering the pump body materials, attention must also be paid to the installation method, immersion depth, insulation structure, bearing cooling, seal heat isolation, and minimum flow recirculation. In Jiangsu Haifa's high-temperature molten salt pump and molten urea pump solutions, on the medium's freezing point and process requirements, we configure insulation jackets, composite insulation structures, high-temperature resistant flow-wetted parts, and reasonable start-up/shutdown procedures to reduce low-temperature crystallization blockage and high-temperature erosion wear.

1. Toxic, Flammable,atile Media: API685 Magnetic Drive Pumps are More Suitable for Zeroakage Scenarios

For media that are highly toxic,, explosive, volatile, odorous, or subject to strict environmental requirements, even traditional mechanical seal pumps with double seals require long-term attention to leakage, flush fluid, and seal support systems. The API685 magnetic drive eliminates the dynamic seal and uses static seals to isolate the, making it suitable for conveying fine chemicals, pharmaceutical intermediates, lithium battery materials, and-purity media with extremely high leakage requirements. However, a magnetic drive pump cannot simply understood as "install and forget." For high-temperature magnetic drive pumps, it is essential to carefully check the magnet temperature resistance, containment shell eddy current heating, internal circulation cooling, bearing lubrication, dry-run protection, and control. During selection, we clarify whether the medium contains solids, is prone to crystallization, or is prone to vaporization, to avoid operating the magnetic drive pump unsuitable conditions.
4 LNG and Cryogenic Media: VS6 Can Pumps Require Attention to Low-Temperature Materials Pre-Cooling Process
Cryogenic media LNG, liquid methane, and low ethylene pose challenges to pumps mainly from low-temperature cold brittleness, seal contraction, start-up pre-cooling, gas-liquid two-phase risk. The VS6 cryogenic pump typically uses a double-shell structure suitable for low-temperature, high-pressure, and vertical installation scenarios. The difficulties in localization are mainly concentrated in three areas the impact toughness of low materials, the manufacturing precision of the double-shell pressure-bearing, and the stability of low-temperature seal and-cooling process. In our solution design, we low-temperature materials, casing strength, seal system, installation foundation, and pre-cooling as an integrated engineering problem, rather than just a standalone pump.

V. Why Jiangsu Haifa Insists on Integrated R&D of "Materials—Hydraulics—Seals—Monitoring"
The localization of-end special pumps is not about breakthroughs in single points, but about building systemic capabilities. Materials determine whether the pump can contact the medium long-term; hydraulics determine whether the pump can operate efficiently stably; seals determine the on-site environmental and safety boundaries; manufacturing determines whether the equipment can meet requirements; monitoring determines whether users can identify problems early. If only one link is improved, the may still have shortcomings on-site. For example, if the material is well chosen but the hydraulic design is unreasonable, pump will operate off-design for a long time; if efficiency is high but seal scheme is unsuitable, leakage will still occur; if the seal configuration is but there are no monitoring and maintenance standards, it will still be difficult to detect fault trends on in a timely manner. Jiangsu Haifa's R&D approach to combine API610/685 standard pump types, API682 seal schemes CFD hydraulic simulation, domestic material adaptation, performance testing, and on-site operation and maintenance experience to provide users with localization replacement solutions that are to actual working conditions.

VI. Coverage Directions for High-Temperature and High-Pressure Pump Product Selection for Domestic and International Projects
iangsu Haifa can provide selection and technical services around the following directions:
· API610 Chemical Process Pump;
· API610 OH2 Process Pump;
API610 BB2 High Temperature Process Pump;
· API610 BB5 High Multistage Pump;
· API685 Magnetic Drive Pump;
· High Temperature Magnetic Pump;
· Molten Salt Pump;
Molten Urea Pump;
· VS6 Cryogenic Can Pump;
· Low Flow High Head Pitot Tube Pump;
· Rotary Jet Pump;
· Hastelloy Chemical Pump;
· Inconel High Pump;
· Petrochemical Process Pump Manufacturer China;
· Chemical Pump Supplier for Russia Central Asia, Middle East and Southeast Asia.
Corresponding application scenarios include: Oil refining hydroprocessing units, Coal chemical units, Residue oil transfer, Distillate oil transfer, CSP thermal storage molten salt systems, LNG receiving terminals, Deep-sea oil and gas platforms, Fine chemicals, Pharmaceutical intermediates, Lithium battery materials, High-purity reagents,ysilicon, protection desulfurization and denitrification, etc.

VII. Frequently Asked Questions
Q1: For a 450℃ high-temperature salt condition, can directly select an ordinary magnetic drive pump?
It is not recommended to select an ordinary magnetic drive. The 450℃ molten salt condition not only has high temperature also involves issues like crystallization, erosion, thermal expansion, and magnetic coupling temperature rise. ordinary magnetic