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| Email: | info@sanchangpump.net |
| Hotline： | +86 181 4266 2779 |
| +86 193 1300 1794 | |
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+86 181 4266 2779 |
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+86 181 4266 2779 |
| Address： | No.517,Xiangfu Road |
| Yuhua District, | |
| Changsha City | |
| Hunan Province, P.R.C |
API 610 BB4 Horizontal Multistage Centrifugal Pump
Classification:
Multistage Centrifugal Pump
Petrochemical
Urban Water Supply
API 610 Pump
Key words:
Double-inlet Pump
Sectional Parallel Pump
Water Pump
Head Range: 100~ 2500 m (adjustable by changing impeller stages)
Rotational Speed: 1480 r/min / 2980 r/min
Fluid Temperature: ≤380℃
Hotline:
- Product Description
- Performance Parameters
- Installation Drawings
- Installation and Operation
- Faults and Solutions
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- Commodity name: API 610 BB4 Horizontal Multistage Centrifugal Pump
Flow Range: 50 ~ 2,000 m³/h <br/> Head Range: 100~ 2500 m (adjustable by changing impeller stages) <br/> Rotational Speed: 1480 r/min / 2980 r/min <br/> Fluid Temperature: ≤380℃ <br/>
I. Product Overview
The BB4 pump is a horizontal, radially split, single-casing, multistage between-bearing centrifugal pump manufactured in strict accordance with API 610 (ISO 13709) latest standard. Featuring a ring-section (sectional) casing structure and dual-bearing support on both shaft ends, the BB4 design delivers exceptional mechanical rigidity, ultra-high pressure resistance, and stable rotor operation for long-cycle continuous industrial service.
Different from single-stage OH series pumps and double-barrel BB5 pumps, BB4 is a cost-effective high-pressure multistage solution optimized for medium-to-extreme head working conditions. It is widely adopted for high-pressure fluid transportation in petroleum refining, petrochemical, power generation, and water injection projects, trusted for zero-failure continuous operation under harsh process environments.
II. Product Features
- Fully compliant with the latest API 610 industrial heavy-duty standards for high-pressure process systems
- Ultra-high head and high-pressure resistance, stable performance for 24/7 long-cycle continuous operation
- Diversified material solutions for high temperature, corrosion and slight abrasion working media
- Advanced thrust balance system and dual-bearing structure for low vibration and high mechanical stability
- Standardized modular design, high versatility of spare parts and low life-cycle maintenance cost
- Optimal cost-effective high-pressure multistage pump, ideal for replacing expensive BB5 barrel pumps in medium high-pressure scenarios
III. Model Description
Example: D130-88X13 API 610 BB4 Horizontal Multistage Centrifugal Pump
D -- multistage centrifugal pump
130 -- Design rated flow: 130 m³/h
88-- Single‑stage design head:88 m
13-- Total impeller stages: 13 stages
IV. Structural Description
- Standard BB4 Between-bearing Multistage Structure
Horizontal radially split ring-section casing design with symmetric dual-bearing support at both shaft ends. This structural layout minimizes shaft deflection and vibration, ensuring excellent dynamic stability under ultra-high pressure and variable load conditions. - Multi-stage Superimposed Pressurization
Multiple impellers are arranged in series to realize step-by-step pressurization, achieving ultra-high lift with stable hydraulic performance. Optional back-to-back impeller arrangement effectively balances residual axial thrust and improves operation stability. - Professional Axial Thrust Balance System
Equipped with high-precision balance drum or balance disc device, which automatically offsets most axial hydraulic thrust generated by multistage pressurization. It reduces bearing load and greatly extends the service life of bearings and mechanical seals. - High-pressure Resistant Casing Design
Integral sectional casing with thick-wall structure and standard API corrosion allowance. Reinforced through-bolt connection ensures tight sealing and no deformation under extreme high-pressure working conditions. - Full API Mechanical Seal Compatibility
Supports all standard API seal flush plans (11, 13, 21, 23, 32, 52, 53, 62). Multiple seal configurations including single seal, tandem seal and double seal are available for high-temperature, flammable, toxic and corrosive media to achieve zero leakage operation. - Heavy-duty Lubrication & Bearing System
High-strength precision rolling bearings with optional grease lubrication or forced oil lubrication. It supports long-term high-speed and high-load operation with low noise and low wear. - Standardized & Maintainable Structure
Modular stage structure with highly interchangeable spare parts. Reasonable disassembly procedure simplifies daily maintenance without integral pipeline removal, reducing equipment downtime and operation costs. - Full API 610 Compliance
Complete with vent ports, drain ports, wear protection rings, anti-rotation devices, and standardized cooling & flushing auxiliary pipelines, fully meeting the strict requirements of petrochemical and power heavy-duty working conditions.
V. Applicable Operating Conditions
API 610 BB4 multistage pumps are specially designed for high-head, high-pressure industrial fluid delivery scenarios:
- Power Generation Industry: High-pressure boiler feed water, condensate boosting, plant auxiliary circulating water, and thermal system water supply
- Oil & Gas Field: Reservoir water injection, produced water reinjection, pipeline high-pressure boosting, and on-site process fluid delivery
- Petroleum & Refinery: Lean amine circulation, desalting water transfer, high-temperature process oil circulation, and refining medium boosting
- Chemical & Coal Chemical: High-pressure process water, corrosive chemical medium transportation, and industrial wastewater treatment
- General Heavy Industry: High-pressure water descaling, long-distance water transmission, mine high-lift drainage, and water treatment pressurization
Typical Operating Parameters
- Flow range: 10 ~ 2000 m³/h
- Head range: 100 ~ 2500 m
- Max working pressure: 25.0 MPa
- Medium temperature: -20℃ ~ +380℃
- Rotation speed: 1480 / 2980 / 3500 RPM
- 24/7 continuous heavy-duty operation support
VI. Wetted Parts Material Options:
Customizable material configurations are available to match different medium temperatures, corrosion degrees and abrasion conditions, fully adapting to diverse industrial working conditions:
- Clean Water & Boiler Feed Service
Casing: WCB Carbon Steel / Cast Iron
Stage casing & Diffuser: SS304 Stainless Steel
Impeller: SS304
Shaft: 4140 Alloy Steel with stainless steel protective sleeve - General Oil & Mild Corrosive Service
Casing: WCB Carbon Steel
Wetted trim: SS316L Stainless Steel
Impeller: SS316L
Shaft: 4140 alloy steel with SS316L anti-corrosion sleeve - Medium Corrosive & High-temperature Service
Casing: Carbon steel with stainless steel lining
Wetted parts: CF8M cast stainless steel / Duplex 2205
Shaft: Duplex stainless steel - Severe Corrosive & High-chloride Service
Wetted parts: Super Duplex 2507, CD4MCU, Hastelloy optional
Compliant with NACE MR0175 for sour oil & gas service
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- Flow range: 10 ~ 2000 m³/h
- Head range: 100 ~ 2500 m
- Max working pressure: 25.0 MPa
- Medium temperature: -20℃ ~ +380℃
- Rotation speed: 1480 / 2980 / 3500 RPM
- 24/7 continuous heavy-duty operation support
- Flow range: 10 ~ 2000 m³/h
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Key Points for Installation & Operation of Sectional Parallel Pump
Ⅰ. Installation Requirements
1. Foundation Leveling: Level the base firmly with shim plates; fasten anchor bolts tightly to avoid vibration and ensure no tilt.
2. Coupling Alignment: Align the coupling between pump and motor. Rotate rotor by hand smoothly without jamming or abnormal noise.
3. Double Suction Piping (Critical): The two suction pipelines on both sides shall feature identical pipe size, length and flow resistance to guarantee even incoming flow for valid self-balancing; no pipeline weight shall bear on pump flanges.
4. Discharge Piping: Install gate valve, check valve and flexible connector on each pump discharge port to prevent reverse water backflow and pump reverse rotation after shutdown.
5. Keep Original Balancing Structure: Do not block or modify the factory-built balancing pipe and balancing structure of the pump.
Ⅱ. Startup Operation
1. Pre-startup: Fully open both suction valves, fill pump casing with liquid and vent all trapped air; dry running is strictly forbidden.
2. Single Pump Startup: Start pump with discharge valve closed; gradually open the valve after stable running to reach rated working condition.
3. Parallel Multiple Pumps (Key): Never start all pumps simultaneously; start the next unit only after the former runs steadily to avoid water hammer and motor overload.
Ⅲ. Operation Specifications
1. Operating pressure and motor current of all parallel pumps shall stay roughly consistent with limited deviation.
2. Long-term low-flow or dead-head operation is prohibited, which may damage self-balancing structure and accelerate bearing wear.
3. Normal running requires no violent vibration or abnormal sound; bearing temperature shall not exceed 75℃, slight dripping from mechanical seal is acceptable.
Ⅳ. Shutdown Procedure
1. Gradually close discharge valve before cutting off power to stop pump.
2. Drain all residual liquid inside pump for long-term shutdown to prevent freezing and rusting.
Ⅴ. Common Simple Troubleshooting
1. Excessive vibration & overheating: Uneven bilateral inflow, air ingress or poor coupling alignment.
2. Backflow & insufficient discharge pressure for parallel set: Damaged check valve or mismatched pump head parameter.
3. Failed self-balancing & rapid component abrasion: Unbalanced flow on double suction sides or blocked suction pipelines.
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Solutions: Clean suction strainer and optimize suction pipeline layout to eliminate air pockets; increase liquid submergence to avoid vortex; inspect and replace worn impellers, wear rings and diffusers; recalibrate operating parameters to match system design; replace aging inter-stage gaskets to eliminate internal leakage; adjust valve opening to reduce excessive pipeline resistance.
1 Excessive Vibration & Abnormal Noise
Main Causes: Shaft misalignment, rotor unbalance, bearing wear or lubrication failure, cavitation, loose casing through-bolts, impeller friction with stationary parts, and inconsistent thermal expansion after temperature rise.
Solutions: Recalibrate pump-motor coupling alignment; perform rotor dynamic balancing test; replace defective bearings and replenish qualified lubricating oil/grease; eliminate cavitation by improving NPSHa and suction conditions; retorque all casing tie rods and stage bolts according to API torque standards; check and adjust internal rotor clearance to eliminate friction; warm up the pump gradually for high-temperature medium operation.
2 Casing & Inter-stage Leakage
Main Causes: Aging and deformation of multi-stage gaskets, loose tie rod preload caused by thermal cycling, casing surface deformation, medium corrosion between ring sections, and improper reassembly precision after maintenance.
Solutions: Replace all stage gaskets and sealing accessories regularly; retorque tie rods after thermal stabilization to maintain uniform preload; repair or replace deformed casing components; adopt corrosion-resistant wetted materials for corrosive media; strictly control assembly clearance and flatness during reassembly to ensure stage sealing accuracy.
3 Mechanical Seal Leakage & Short Service Life
Main Causes: Improper API seal flush plan configuration, seal face overheating due to insufficient cooling, medium particle abrasion, shaft sleeve wear, incorrect seal installation, and high-frequency pressure impact.
Solutions: Match standard API flush plans (Plan 11/21/23/53) according to medium characteristics; inspect and unblock cooling and flushing pipelines; install filter devices for particle-containing media; replace worn shaft sleeves and failure seal assemblies; standardize seal installation compression and coaxiality; adopt high-pressure resistant tandem seals for ultra-high pressure working conditions.
4 Bearing Overheating & Early Failure
Main Causes: Excessive or insufficient lubricant, deteriorated lubricating oil, bearing fatigue wear, excessive axial thrust due to failure of balance disc/drum, and shaft deflection caused by long-term overload operation.
Solutions: Replace lubricant regularly and control filling volume strictly; inspect and repair the balance thrust system to reduce axial load; replace aging bearings in time; eliminate pump overload and off-design long-term operation; monitor bearing temperature and vibration in real time for early fault warning.
5 Pump Overload & High Motor Current
Main Causes: Excessive medium density or viscosity, rotor internal friction, incorrect assembly clearance, system back pressure lower than design value, and motor operation failure.
Solutions: Confirm medium parameters and adjust operating conditions; check and eliminate internal rotor friction points; re-calibrate assembly clearances of multistage components; adjust discharge valve to stabilize system back pressure; inspect motor electrical system and repair abnormal operating faults.
6 Preventive Maintenance Tips
Regular standardized maintenance effectively avoids common BB4 pump failures and extends service life. Regularly inspect sealing systems, lubrication status, bolt preload and rotor operating stability; conduct periodic hydraulic performance calibration and wear part inspection; implement gradual temperature rise and stable startup for high-pressure and high-temperature working conditions; reserve core spare parts to minimize downtime risk for industrial continuous production.
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Hunan Sanchang Pump Co., Ltd.
| Email: | info@sanchangpump.net |
| Hotline: | +86 181 4266 2779 |
| +86 193 1300 1794 | |
| Mobile/Wechat/WhatsApp: | +86 181 4266 2779 |
| Address: | No.517,Xiangfu Road, Yuhua |
| District, Changsha City | |
| Hunan Province, P.R.C |
