Jiangsu Haifa Machinery Manufacturing Co., Ltd.

I. Product Overview

The BA Series Chemical Process Pump is a high-efficiency, heavy-duty chemical process pump developed by Jiangsu Haifa Machinery Manufacturing Co., Ltd. in accordance with API 610 (American Petroleum Institute Standard) 11th Edition. Among them, the BB4 type features a radially split, multi-stage, between-bearings design, suitable for demanding conditions requiring high head and moderate flow rates.

The BB4 pump offers smooth operation, excellent cavitation performance, high sealing reliability, and easy maintenance. It is widely used in petrochemicals, coal chemicals, power plants, seawater desalination, and general industrial processes.

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II. Model Designation (Example)

BA BB4 150×100-4S

• BA: Chemical process pump series

• BB4: API 610 construction type (multi-stage, radially split, between-bearings)

• 150: Discharge diameter (mm)

• 100: Suction diameter (mm)

• 4: Number of impeller stages

• S: Material code (S = Stainless steel, D = Duplex steel, C = Cast iron, etc.)

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III. Product Features

1. Complies with International Standards

• Fully meets API 610 11th Edition (BB4 type) requirements, suitable for continuous heavy-duty service.

2. High Head, Multi-Stage Design

• Multi-stage impellers (2 to 10 stages) deliver high head at moderate flow rates, reducing the need for series-connected pumps.

3. Radially Split Construction

• Radially split casing allows easy access to rotating components without removing piping, reducing maintenance time and cost.

4. Between-Bearings Design

• Shaft supported by bearings at both ends ensures smooth operation, high speed and high head capability, low vibration, and long life.

5. Excellent Hydraulic Performance

• CFD-optimized impeller and diffuser hydraulic models provide high efficiency, wide high-efficiency range, and low NPSH requirement.

6. Flexible Material Options

• Wetted parts available in cast iron, carbon steel, 304/316L stainless steel, duplex stainless steel, Hastelloy, etc., suitable for acids, alkalis, hydrocarbons, and media containing solid particles.

7. Reliable Sealing System

• Single or double mechanical seals, API 682 standard flushing plans (Plan 11/21/31/52/53, etc.).

8. Heavy-Duty Bearings & Lubrication

• Standard oil bath lubrication, with optional oil mist or forced oil lubrication; bearing life >25,000 hours.

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IV. Technical Parameters (Typical Range)

Parameter	Range
Flow Rate	3 – 400 m³/h
Head	100 – 600 m (up to 800 m)
Medium Temperature	-40°C – +400°C (depending on material)
Max. Working Pressure	10 MPa (100 bar)
Rotational Speed	1450/2950 rpm (or motor-dependent)
Efficiency (Best Point)	Up to 78%
Min. NPSH Required	≤2.5 m (can be lower with special first-stage impeller design)
Flange Standard	HG/T 20592 / ANSI B16.5 optional

Note: Parameters above are based on clean water. Refer to selection calculation sheet for final data.

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V. Construction (Main Components)

Component	Description
Casing	Radially split, volute or diffuser type; suction/discharge flanges on sides or same side (depending on stage count)
Impeller	Multi-stage closed impeller, balancing grade G2.5
Shaft	High-strength alloy steel, stainless steel optional
Shaft Sleeve	Replaceable, protects shaft and seal
Bearing Housing	Between-bearings, rolling bearings (deep groove + angular contact) or sleeve bearings (for high speed)
Mechanical Seal Chamber	API 682 compliant, accommodates various flushing plans
Coupling	Diaphragm or pin type for smooth power transmission
Baseplate	Welded steel or cast iron baseplate with drip tray

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VI. Applications

• Petrochemicals: Hydrocarbons, solvents, acids/alkalis, high-temperature oil transfer

• Coal Chemicals: Methanol, ammonia synthesis, high-pressure condensate

• Power Plants: Boiler feedwater, condensate, desuperheater water

• Seawater Desalination: Reverse osmosis high-pressure feed pumps

• General Industry: High-temperature/high-pressure processes in fertilizers, pharmaceuticals, metallurgy, papermaking

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VII. Performance Curves (Illustrative)

(Performance curve chart can be inserted here, with flow rate Q on the horizontal axis, head H and efficiency η on the vertical axis.)

• Q-H Curve: Head decreases gently as flow increases (characteristic of multi-stage pumps)

• Q-η Curve: Wide high-efficiency range, efficiency at rated point ≥75%

• Q-NPSHr Curve: Low NPSH requirement; inducer optional for certain conditions

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VIII. Installation & Maintenance Highlights

1. Installation

• Pump-motor alignment accuracy ≤0.05mm

• Stress-free piping connection; avoid cavitation in suction line

• Prime and vent pump before first startup

2. Maintenance

• Check bearing temperature (≤75°C) and vibration

• Mechanical seal: no leakage or slight seepage (≤5 ml/h)

• Inspect bearings and seals every 4,000 operating hours or six months

3. Overhaul

• Remove casing cover bolts and extract rotating assembly as a unit

• Replace wear parts such as impellers, diffusers, shaft sleeves

• Perform rotor dynamic balancing after reassembly

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IX. Selection & Customization Services

Jiangsu Haifa Machinery Manufacturing Co., Ltd. offers:

• Free selection calculation (based on media, temperature, pressure, flow, NPSH requirements)

• Material upgrades (for corrosive, abrasive, high-temperature conditions)

• Sealing system customization (API 682 Plan 52/53/54, etc.)

• Explosion-proof & VFD configurations (ATEX/IECEx optional)

• Fast delivery of complete pumps and spare parts

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