Jiangsu Haifa Machinery Manufacturing Co., Ltd.

When selecting chemical pump designs for large-scale chemical plants—such as those in refining, aromatics, PX, PTA, polyester, chemical fiber integration, caprolactam,, engineering plastics, oil, heat transfer fluid circulation, refrigerant systems, coal chemicals, methanol-to-olefins, coal-to-aromatics, solar thermal power generation, molten salt energy storage, and high-temperature experiments—we often encounter a common issue: customers aren't simply asking, "Can this pump handle high-temperature media?" Instead, they are more about whether the pump can operate stably over the long term in high-temperature, flammable, explosive, toxic, highly corrosive, or highly permeable media, whether it can reduce leakage risks, and whether maintenance costs can be controlled. High-temperature magnetic drive pumps are precisely the type of sealless pump gaining increasing attention from users under such operating conditions.

From a technical perspective at Haifa, a high-temperature magnetic drive pump is not simply a standard magnetic pump with thickened or enlarged components. It involves multiple details, including the temperature resistance of magnetic steel, isolation shell materials, sliding bearing cooling, internal circulation channels, net positive suction head (NPSH), thermal expansion compensation, jacketed insulation, and dry-run prevention monitoring. Particularly in continuous large-scale units such as refineries, petrochemical plants, coal chemicals, PTA, polyester, fine chemicals, and new energy materials, if a pump experiences leakage, cavitation, demagnetization, or bearing wear, the impact often extends beyond a single pump to the stable operation of an entire production line.

I. What are the main demanding applications for high-temperature magnetic drive pumps?  In our view, the most suitable applications for high-temperature magnetic drive pumps can be summarized one phrase: high-temperature media that must not leak. Examples include benzene, toluene, xylene, PX, acetic acid, phenols, ketones, thermal oil, heat transfer fluids, certain organic solvents, and high-temperature corrosive liquids. These media are often flammable, volatile, toxic, odorous, highly permeable, or subject to strict environmental requirements If conventional mechanical seal pumps are used, the seal faces, O-rings, flushing systems, and cooling systems must withstand significant pressure, increasing on-site maintenance workload.

The advantage of magnetic drive pumps in eliminating traditional dynamic seal structures by using magnetic coupling to transmit torque, thereby sealing the media inside the pump body and isolation shell. This design offers clear value for units where leaks, drips, or emissions are unacceptable. Especially in high-temperature thermal oil systems, aromatics units, PTA units, polyester units, coal chemical solvent recovery systems, pharmaceutical intermediates, and fine reaction systems, high-temperature magnetic drive pumps serve as one of the sealless delivery solutions.

However, we also remind users that not all high-temperature media are suitable for direct selection of magnetic drive pumps If the media has high solid content, is prone to crystallization or polymerization, has significant viscosity changes, or poses a high risk of vaporization due to insufficient inlet conditions, the pump type must be reassessed. Magnetic drive pumps are sensitive to dry running, and sliding bearings are vulnerable to particle wear. Therefore, selection should not only consider flow rate and head but also account for media composition, temperature, viscosity, saturated vapor pressure, inlet pressure, NPSHa, solid content, and operating mode.

II. Which large-scale domestic units have a greater need for high-temperature drive pumps?  From the domestic market perspective high-temperature magnetic drive pumps primarily used in large-scale refining and chemical integration, aromatics PX, PTA, polyester, caprolactam, nylon, coal chemicals, fine chemicals, and thermal oil systems.

In refining and aromatics units, common media include light hydrocarbons, aromatic solvents, benzene, toluene, xylene, high-temperature tower bottom liquids, and heat transfer oils. These media are typically flammable and explosive, with some being volatile and toxic. For these pump positions, reducing leakage means reducing safety risks.

In PTA and polyester units, media such as acetic acid, PX, mother liquor, heat transfer fluids, and solvent recovery systems demand high corrosion resistance, temperature tolerance, and continuous operation capability. PTA units are large-scale continuous production facilities with high shutdown costs. Therefore, pumps must not only meet parameters but also consider long-term stability, spare part interchangeability, and on-site maintenance convenience.

In new material units such as caprolactam, nylon, bisphenol A, PC, MMA, and phenol-acetone, many intermediates or solvents have irritating odors, toxicity, or strong permeability. Once a conventional seal pump leaks, the pressure from on-site odors, environmental protection, and safety management increases. For such media, high-temperature magnetic drive pumps, canned motor pumps, and high-grade mechanical seal API610 pumps need to be compared based operating conditions.

In coal chemical and methanol-to-olefins units, media such as methanol,atics, phenols, sulfur-containing organics, and some high-temperature solvents also require sealless delivery. Special attention must be paid to whether the media is clean. If the media contains coke fines, particles, crystallized substances, or is prone to scaling, magnetic drive pumps may not be the best choice. In such cases, API610 BB-type, OH2-type, or other- and corrosion-resistant structures appropriate seal flushing plans may be suitable.

III. What key parameters do we focus on during selection?  Selection of high-temperature magnetic drive pumps cannot be solely on the question, "Can it withstand 400°?" We typically confirm the following issues first. First, what is the media temperature? Does it heat up after cold startup, or is it consistently at high temperature? Under high-temperature conditions, the materials of the pump body impeller, shaft sleeve, sliding bearing, isolation shell, magnetic steel, and O-rings must all match. Second, is the media prone to vaporization? high-temperature media, when inlet pressure is insufficient, may vaporize at the pump inlet or within the magnetic cavity, causing cavitation, dry running, and bearing failure. Especially for media like hot water, condensate, light hydrocarbons, and solvents, the effective NPSH must be calculated. Third, does the media contain particles, crystallize, or polymerize? The internal circulation channels of magnetic drive pumps are critical; if particles enter the sliding bearing area, wear occurs; if the media crystallizes upon cooling, it can block flow paths or cause startup difficulties. Fourth, jacketed insulation or heat tracing required? For media such as thermal oil, molten salt, asphalt, or easily crystallized substances, we generally consider pump body jackets, pump cover jackets, insulation layers, electric heat tracing, or steam tracing to prevent media solidification after shutdown. Fifth, is temperature, vibration, and dry-run protection needed? High-temperature magnetic drive pumps should ideally be equipped with temperature, vibration monitoring, monitoring, or dry protection, especially for continuous operation in large-scale units.IV. Jiangsu Haifa's supporting capabilities for API610 process pumps  Jiangsu Haifa Machinery Manufacturing Co., Ltd. has long been engaged in the design and manufacture of API610 chemical process pumps corrosion-resistant pumps, high-temperature pumps, magnetic drive pumps, canned motor pumps, molten salt pumps, and special alloy pumps. Our products focus not only on single pump parameters but also on continuous operation under unit conditions, material compatibility, sealing systems, cooling systems, and on-site maintenance. In terms of API610 chemical process pumps, our HES series OH1/OH2 chemical process pumps are suitable for refining, petrochemicals, coal chemicals, chemical fibers, power plants, environmental engineering, and seawater desalination This series covers a flow range of 2 to 2600 m³/h, head up to 300 m, temperature range of -80 to 450°C, and design pressure of 2.5 to 26 MPa.rosion-resistant materials such as stainless steel, duplex steel, Hastelloy, Monel, and titanium alloy can be selected based on media characteristics, with sealing and flushing cooling plans configured to meet operating conditions.

For small-flow, high-head, flammable, explosive, or highly corrosive clean media, we also offer API610 OH2-HES(X) small-flow process pumps. This covers a flow range of 0.8 to .5 m³/h head of 12 to 125 m, and temperature range of -80 to 450°C, suitable for small-flow, high-head delivery in industries such as chemicals, refining, pharmaceuticals, food, and paper.

For units with high temperature, high pressure, heavy-duty, and continuous operation requirements our API610 BB2 heavy-duty petrochemical process pumps cover a flow range of 50 to 4000 m³/h, head up to 650 m, temperature range of -80 to 450°C, and design pressure of 5 to 15 MPa. These are suitable for refining, petrochemicals, coal chemicals, crude oil transportation, natural gas processing, and high-temperature tower bottom pumps.

For higher pressure conditions, our API BB3 single-casing and double-c horizontal split multi-stage pumps are used in high-pressure applications such as petrochemicals, coal chemicals, pipeline transportation, power plants, seawater desalination, oilfield water injection, and boiler feedwater. The double-casing structure can adapt to high-temperature conditions of -80 to 450°C, with a maximum design pressure of 35 MPa and a maximum speed of 9000 r/min, suitable for units with higher demands for pressure, temperature, and long-term stability.

High-temperature magnetic drive pumps and API610 chemical process pumps are not mutually exclusive but are selected based on operating conditions. For clean, high-temperature, flammable, toxic, or non-leakable media, high-temperature magnetic drive pumps or canned motor pumps can be prioritized. For high-temperature, high-pressure large-flow, slightly particulate, or heavy-duty continuous operation scenarios, a comprehensive selection involving API610 pump types such as OH2, BB2, BB3 BB5, and VS series is required.

V. Our technical recommendations  If users are working on projects involving aromatics, PX, PTA, polyester, coal chemicals, fine chemicals, new energy materials, or thermal oil systems, we recommend clearly categorizing pump positions during preliminary design phase: which media must be sealless, which are more suitable for API610 mechanical seal pumps which require jacketed insulation, and which must prioritize NPSH calculations. The value of-temperature magnetic drive pumps lies not only in "having no mechanical seal" but also in helping units reduce leakage points, on-site maintenance pressure, and improve continuous operation safety under suitable media,, and inlet conditions.

During selection, we provide users with solutions closer to actual operating conditions based on media characteristics, unit grade, design pressure, design temperature, flow rate, head, NPSHa, materials, cooling methods, and monitoring requirements. For large-scale petrochemical units, pumps are not simple procurement items but critical equipment related to safe production, environmental emissions, energy consumption control, and long-term unit operation. Jiangsu Haifa will continue to focus on application areas such as API610 chemical process pumps, high-temperature magnetic drive pumps,alless pumps, petrochemical pumps, refinery pumps, PTA pumps, PX pumps, thermal oil pumps, and coal chemical pumps, providing domestic and international users with high-temperature, corrosion-resistant, sealless, and heavy-duty process pump solutionsHigh-temperature magnetic drive pumps, API610 chemical process pumps high-temperature magnetic drive pumps, sealless pumps, petrochemical pumps,TA unit pumps, PX aromatics pumps, thermal oil pumps, coal chemical pumps, high temperature magnetic drive, API610 chemical process, sealless pump manufacturer China.