BB2 series API 610 heavy duty centrifugal process pumps

Our standard single-stage API 610 BB2 type pumps are center line-mounted, radially split, and feature a double-suction design with bearings located between the suction and discharge ends.

These pumps and their motors are flexibly coupled and mounted on a shared base plate.

The radial casing pull-out design allows for the removal of the rotor assembly without the need to disturb the driver, coupling hubs, or casing nozzle connections

Model：API610 BB2
Standard：API610 
◉ Parameters：
Capacities：Q～2270 m3/h
Heads：H～740 m
Temperatures：T-50 ℃ ～450 ℃
Pressure：P～10 MPa
◉ Feature
Single or two-stage, radially split, supported at both ends, horizontal, centerline installation, rigid shaft design for heavy workstations. The first stage impeller can adopt double suction impeller to reduce pump NPSHr, pump body double volute structure, radial force balance; API standard sealing cavity, suitable for various sealing flushing schemes. The pump inlet and outlet are vertically upwards.
◉ Application:
Clean or polluted, low temperature or high temperature, chemically neutral or corrosive liquids, refinery, petrochemical, chemical, coal chemical, power station, thermal power plant, offshore platform, pipeline and pressurization, etc.

• Medium :

  Sour water、Chemical raw materials、Petrochemical

• Flows :

  to 7,500m3/h (33,000 GPM)

• Heads :

  to 500m (1,633 ft)

• Temperatures :

  to 450℃(840℉)

• Pressures :

  to 150 bar (2,175 PSIG)

• Speed :

  /

• API Type Code :

  API610 11th BB2

API610 BB1 Axially Split Double Sution Centrifugal Pump

API 610 BB2 series heavy duty centrifugal process pumps

Product attributes:

Maximum head :>150m

Maximum fiow:>400L/min

Driving type:Motor

Working impeller number:Muitistage Pump

Working impeller inlet way:Single Suction Pump

Pump shaft positon:Horizontal Pump

Installation height:Suction Centrifugal

Impeller structure:Closed

Transportation package:Wooden Case

Specification:API 610 standard 

Origin:Dalian,Liaoning,China

Size: DN800

Capacities: ~ 10000m3/h
Heads: ~ 200m    
Temperature : ~ 160ºC  
Pressures: ~ 50 bar

Design:

1. TheBB1 series is  single stage ,double suction,axial split,volute casing pumps
   Suitable for pumping clean or slightly polluted liquids. Apply in the industries of water feeding and water treatment ,irrigation and sewage treatment,power station ,zone heat supply ,pulp and paper ,pipeline and offshore platform.
   Oil Lubrication,  Where oil lubricated bearings are fitted the oil rings function equally well irrespective of the direction of ritation so reverse running is not detrimental to the securty of the unit.
   The oil rings rotate with the shaft and contiuously deliver oil into the bearing cap whence it flows back through the bearing into the oil reservoir.
   The combination of generous bearing dimensions and dependable lubrication assists the SM series of pumps in achieving a long. trouble free service life.
   Seedy inspection and  dismantling of the complete rotating element is assured by the axially split casing design.

Material:

Cast steel , LTCS
Chrome steel CA15/CA6NM
Austenitic Stainless steel
Duplex steel
Super Duplex steel
Hastelloy
Titanium C2, C3
Titanium alloy C5,C12
904L
Alloy 20
*It depends the customer's request.

	S-5	S-6	C-6	S-8	A-7	A-8	D-1	D-2
Casing	Cast steel	Cast steel	CA15/CA6NM	Cast steel	AUST SS	316 AUS	DUPLEX	SUPER DUPLEX
Impeller	Cast steel	12%CR	CA15/CA6NM	316 AUS	AUST SS	316 AUS	DUPLEX	SUPER DUPLEX
Shaft	AISI4140	AISI4140	SS420	316N	AUST SS	316N	2205	2507
Wear rings	12%CR	12%CR	12%CR	316 Hard faced	AUST SSHard faced	316 Hard faced	Duplex Hard faced	SUPER Duplex Hard faced
Bearing Frame	Cast steel	Cast steel	Cast steel	Cast steel	Cast steel	Cast steel	Cast steel	Cast steel

Product profiles:

• BB2 series heavy-duty chemical process pumps are horizontal, radially split, supported at both ends, and centerline mounted centrifugal pumps.
• They are designed to meet demanding working conditions and can be divided into single-stage, two-stage, and three-stage structures.
• They are highly efficient, energy-saving, highly reliable, high temperature resistant, and high pressure resistant.
• They are widely used in oil refining, petrochemicals, and other industries to transport high-temperature, high-pressure, or corrosive liquids.

Features：

• Between bearings, centerline mounted, minimize displacement by heat expansion and cold contraction.
• Double volute, dynamically balanced, self-venting design.
• Top suction and top discharge, full access case cover for both ends.
• Shaft designed working in tensile stress preventing rotors play.
• API 682 seal chamber accommodates multiple seal types and pipe plan.
• Radially split casing with spacer coupling, replacement to impeller, seal or bearing without dismounting pump casing.

Applications：

• High pressure application.
• Sour water.
• Propane.
• Light hydrocarbons.
• Hot and corrosive naphthenic crude oil.
• Hot sandy crude oil.
• Vacuum bottoms.
• Refining.
• Petrochemical.
• Gas processing.
• Synfuels.
• Offshore.

Core structural characteristics of BB2 pump
The full name of BB2 is "Between Bearing, Radial Split, Single Casing, Multi Stage", which means two end support, radial splitting, single shell, multi-stage pump. You can understand it as a 'horizontal multi-stage centrifugal pump'.
The core of its design is to achieve high head by connecting multiple impellers in series within a radially divided casing, while maintaining the advantage of easy maintenance of a horizontal open type pump.
Structural characteristics and composition
1. Single shell and radial subdivision • Single shell: The pump has only one pressure bearing shell, which is the horizontally split pump body. The upper and lower pump bodies are fastened with bolts.
• Maintenance convenience: This is the biggest advantage of BB2. During maintenance, simply lift the upper pump casing to fully expose all internal rotor components (impeller, guide vanes, shaft sleeves, seals, etc.) without disassembling the inlet and outlet pipelines and couplings, making maintenance very convenient.
2. Multi stage impeller arrangement • Series arrangement: All impellers are installed in the same direction, increasing pressure step by step to achieve high head.
Symmetrical arrangement: The impeller can also be arranged in a back-to-back symmetrical manner (with the first stage in the middle and diverging towards both ends), greatly balancing axial forces, reducing reliance on large balancing devices (such as balancing drums), and improving efficiency.
3. Two end support • The pump shaft is supported by independent bearing boxes located at both ends of the pump body, ensuring stable operation and suitable for higher speeds and power.
4. Balance system • Depending on the arrangement of the impeller, it may be equipped with balance drums or smaller balance disks, mainly used to balance the remaining axial forces. When arranged symmetrically, the axial force is basically self balanced.
5. Sealing system • Equipped with single or double end mechanical seals that comply with API 682 standards.
🏭  The main application industries and working conditions of BB2 pump
The BB2 pump is designed specifically for clean or slightly particulate liquid operating conditions that require medium to high head, continuous and stable operation, and high maintenance convenience.
Why is BB2 pump commonly used in typical working conditions and sections of the application industry?
Petrochemical • Boiler feedwater pump (medium pressure boiler)
Circulating water pump (such as solvent circulation, MEA/DEA decarbonization solution circulation)
High head requirement for hot water circulation pump: to meet the high pressure required by the process flow.
Convenient maintenance: The scheduled maintenance time for the chemical plant is tight, and it can be repaired by opening the cover, saving a lot of time.
Refinery • Crude Oil Transfer Pump
Product delivery pump (diesel, kerosene)
The washing tower circulating pump is reliable and easy to maintain: it meets the long-term operation requirements of the refinery and can be quickly repaired in case of faults.
Industrial Water Supply and Energy • Factory High Pressure Water Supply
Regional heating secondary network circulation pump
Efficiency and cost balance of high-pressure pumps (small and medium-sized) in reverse osmosis systems: In multi-stage pumps, BB2 is one of the best balance points between performance and initial investment cost.
Steel and Manufacturing • High pressure descaling pump (some models)
The process water booster pump is sturdy and durable: with a solid structure, it can adapt to industrial environments.

BB2 vs. BB3/BB5: Core Differences and Selection
The key to understanding BB2 is to clarify its boundary with higher-level double shell pumps.

Comparison Dimension BB2 (Radial Split Single Shell) BB3/BB5 (Double Shell Pump)
Shell and pressure bearing single shell, horizontally split. The pressure bearing capacity is limited by the sealing of the split flange and is usually used for pressure ratings of Class 600 and below. Double layered shell. The outer cylinder is forged as a whole, without large diameter split flanges, and can withstand extreme high pressure of Class 900 and above.
Once the middle opening gasket fails, it will cause direct leakage of the medium. Double insurance: The medium leaked from the inner pump core is contained in the outer cylinder and led out through the alarm hole to prevent dangerous media from directly leaking into the environment.
High voltage application scenarios, but not extreme; The medium has relatively low hazard; Pay attention to maintenance speed and cost. Ultra high pressure, high temperature, and high-risk media; Prioritize safety and zero leakage.
The Golden Rule of Selection:

Pressure rating ≤ Class 600, medium is not extremely dangerous, and quick maintenance is preferred ->BB2 is preferred.

Pressure rating ≥ Class 600, or medium is high temperature, high-risk, volatile ->BB3 or BB5 must be selected.

Summary: API 610 BB2 pump is the "main force" and "economically applicable heavy equipment" under high head conditions. It perfectly balances performance, reliability, and maintenance convenience within the upper limit of its pressure capacity. For most non extreme chemical, refining, and industrial processes, BB2 is a globally validated and cost-effective multi-stage pump solution. But when the working condition reaches the safety red line, it must be upgraded to a double shell pump (BB3/BB5)

Sulzer's BB2 pump is a core mainstay in its API 610 product line and is widely used in petroleum, petrochemical, and demanding industrial applications. It actually includes two famous product series: BBS/CD series (single-stage) and BBT/BBT-D series (two-level)-
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three
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five
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🔧  Structural features and technological advantages
BB2 pump is a radial split, two end support structure-
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Compared to cantilever pumps, this design can more effectively handle high-pressure, high-temperature, and high flow conditions. The following are its main structural features:
• Centerline support: The pump body support point is located on the centerline to ensure symmetrical thermal expansion during high-temperature operation, and the pump and drive mechanism are well aligned to avoid misalignment and jamming-
one
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three
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Double suction impeller: The impeller absorbs water from both sides at the same time, which can significantly reduce the cavitation allowance (NPSH3) and effectively prevent cavitation from occurring. The BBT-D series adopts this design-
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three
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five
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High rigidity shaft design: The first critical speed of the rotor is much higher than the operating speed, ensuring that the pump can operate smoothly and reliably under various working conditions-
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High durability design: The shell is designed to withstand twice the API 610 pipe opening load and can withstand pipeline stress. For abrasive media, SUME anti-wear coating can also be optionally selected-
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• Coke crushing option: For operating conditions containing solid particles such as delayed coking units, mature coke crushing devices can be optionally equipped-
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three
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📊  Core parameter range
Sulzer BB2 pumps cover a wide range of performance through different product series, with specific technical parameters as follows:


Product Series
series
Maximum flow rate (m ³/h)
Maximum head (m)
Maximum pressure (bar)
Maximum temperature (° C)
Main application scenarios
BBS / CD -
one
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two
-
five
single-stage
7,000
eight hundred
fifty
four hundred and twenty-five
Refinery tower bottom feed, reverse osmosis seawater desalination high-pressure pump, solar thermal power generation thermal oil circulation
BBT / BBT-D -
three
-
four
-
five
two levels
2,300
seven hundred and sixty
one hundred
four hundred and twenty-five
Coking furnace filling, boiler feedwater pressurization, high-pressure refining process
🏭  Core application industry
The design features of BB2 pump make it very suitable for the following demanding industries:
1. Petroleum refining: widely used in high temperature, high pressure, and low NPSH requirements such as atmospheric/vacuum tower bottom feed, fractionator bottom, coking furnace filling, etc-
one
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three
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six
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2. Petrochemical industry: Used for the process flow of large-scale petrochemical joint units, such as providing 13 BB2 pumps for the 2.6 million tons/year aromatic hydrocarbon unit of Guangdong Petrochemical Refining and Chemical Integration Project in China-
nine
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3. Offshore oil and gas production: used as a seawater lift booster pump on FPSO (Floating Production Storage and Offloading Unit) to serve water injection and seawater treatment systems-
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4. Energy and electricity: used for boiler feedwater boosting and circulating high-temperature heat transfer oil in solar thermal power plants-
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5. Seawater desalination: As a high-pressure feed pump in the reverse osmosis seawater desalination device, it transports seawater to the reverse osmosis membrane-
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Overall, the Sulzer BB2 pump, with its reliable API 610 structural design, wide hydraulic performance, and multiple optional configurations, is capable of handling complex and critical industrial scenarios ranging from refineries to FPSOs-
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Are you working on specific project selection or would you like to know the differences between it and BB3 or other series of pumps? Tell me your specific needs, and I can provide more targeted comparative information.

Among European and American brands, the advantage of BB2 pump is not that one company dominates, but rather that each has its own strengths. Flowserve and Sulzer, as industry giants, have the widest product lines and profound application experience, while Ruhrpump occupies a place in specific markets with flexibility and cost-effectiveness.

To make a more intuitive comparison, I have compiled the core information of BB2 pumps from several mainstream European and American brands as follows:

🏆  Comparison of BB2 pumps from mainstream European and American brands
Brand Representative Series Flow (m ³/h) Head (m) Pressure (bar) Temperature (° C) Core Features and Advantages
Flowserve HDF has up to 4100 units with missing information. It has strong comprehensive strength and is a global leader with the most complete product line, meeting harsh working conditions such as high temperatures. The nozzle's load-bearing capacity exceeds the API 610 standard.
HED/HED-DS up to 2000 up to 650 up to 120 up to 450 high pressure working conditions expert: suitable for high-pressure scenarios such as boiler feedwater and amine liquid circulation. HED-DS's top-level dual suction design provides excellent anti cavitation performance.
Sulzer BBS/CD (single-stage) up to 7000 up to 800 up to 50 up to 425 hydraulic performance widest: the widest hydraulic performance coverage in the industry. Suitable for high flow demands such as refineries and reverse osmosis seawater desalination.
BBT/BBT-D (two-stage) up to 2300 up to 760 up to 100 up to 425 medium and high pressure conditions expert: suitable for coking furnace filling and boiler feedwater boosting. BBT-D double suction impeller has good anti cavitation performance.
Ruhrpump HVN (single-stage) 100-4200 40-350 up to 40 135-450 Cost effectiveness and customization: modular design, optional coke crushing device, jacket pump casing, etc. Suitable for refining, oilfield water injection, etc.
RON (two-stage) up to 2000 up to 1000 up to 125-50 to 450 high temperature and high pressure economical choice: Provides two-stage pumps that comply with API 610 standards, suitable for high-pressure scenarios such as refineries and petrochemicals, covering a wide range of parameters.
💡  How to choose based on your needs?
You can make choices based on the specific working conditions, budget, and brand preferences of your project:

If pursuing the widest coverage of working conditions and brand guarantee: Sulzer and Volkswagen are the first choices. Sulzer's BBS series has the widest range of hydraulic performance in the industry, making it ideal for projects with high flow rates or special hydraulic requirements. Volkswagen has extensive global application experience and design margins that exceed standards.

If the application scenario is extreme working conditions such as high temperature and high pressure: both brands have targeted designs. Focus can be placed on examining Volkswagen's HED/HED-DS series (specifically for high-pressure optimization) and Sulzer's BBT/BBT-D series (specifically for high-temperature refining process optimization).

If the project budget is limited and reliable API 610 products are needed, Ruhr pumps are worth considering. It is known for its modular design and high cost-effectiveness, providing flexible configuration options (such as coke crushing devices, jacket pump housings, etc.) to meet specific process requirements.

Are you selecting for specific projects in Middle Eastern oil fields, such as water injection, crude oil transportation, or refining processes, or would you like to know about the after-sales service network of a specific brand in the Middle East? Tell me your specific situation, and I can help you conduct a more detailed analysis.