Chemical Process Pump
Pumps & Valves
Chemical Process Pump
1. Product Overview
The chemical process pump is a centrifugal pump engineered for the severe services of the petroleum and chemical industries, normally built to API 610 (e.g., OH2 overhung type). It consists of a pump casing, impeller, shaft, heavy-duty bearing housing, cartridge mechanical seal and driver.
Typical applications include tower-bottom heavy oil transfer in refineries, high-temperature and high-pressure corrosive media in chemical plants, and highly corrosive acid service in polysilicon production.
Key features: robust construction, suitability for high temperature and pressure, convenient cartridge seal replacement, centerline mounting that maintains alignment under thermal growth, and long service intervals.
2. Working Principle
The motor drives the pump shaft and impeller through the coupling. The liquid gains energy from the centrifugal force of the impeller and is discharged after being decelerated and pressurized in the volute. Heavy-duty radial and thrust bearings absorb the residual axial and radial forces of the rotor, while the centerline support keeps the shaft alignment unaffected by thermal expansion at high temperatures.
3. System Classification
By API 610 Structure
| Type | Features | Application Scenarios |
|---|---|---|
| OH1/OH2 (Overhung) | Single-stage overhung, centerline support | Most common, medium-low flow |
| BB1/BB2 (Between bearings) | Single/double stage, two bearings, high rigidity | Large flow, high head |
| VS1-VS6 (Vertical) | Vertical installation | Tank farm transfer, LPG |
4. Detailed Technical Parameters
4.1 Common Materials
| Material | Applicable Temp | Applicable Media | Remarks |
|---|---|---|---|
| CS/ZG230-450 | ≤400℃ | Non-corrosive oils | Basic |
| 304 SS | ≤250℃ | Mildly corrosive organics | General anti-corrosion |
| 316L SS | ≤250℃ | Chloride, acetic acid media | Recommended |
| Duplex 2205 | ≤300℃ | Halogen, chloride, solid-containing | Pitting/wear resistant |
| Hastelloy C276 | ≤400℃ | Strong corrosion (conc. H2SO4, HCl) | Severe services |
4.2 Typical Specification Table (OH2 Type)
| Flow (m³/h) | Head | Design Pressure | Design Temp (℃) | Power | Port Size |
|---|---|---|---|---|---|
| 6～200 | 20～150 | 1.6～2.5MPa | -20～400 | 5.5～110kW | DN40～DN150 |
| 200～600 | 30～200 | 1.6～4.0MPa | -20～400 | 55～250kW | DN100～DN250 |
| 600～2000 | 30～250 | 2.0～6.3MPa | -20～400 | 110～800kW | DN150～DN400 |
4.3 Design Conditions & Performance Indicators
4.3 Design Conditions and Performance Indicators
| Parameter | Specification |
|---|---|
| NPSHr | Checked from curve, min 0.5m margin required |
| Vibration | Per API 610, ≤4.5mm/s at bearing |
| Noise | ≤85dB(A) (1m from pump) |
| Seal type | Cartridge single/double mech seal, with flush plan (Plan 11/21/23/52 etc.) |
| Support | Centerline support (eliminates thermal misalignment) |
4.4 Electrical Parameters
| Applicable Region | Voltage | Frequency |
|---|---|---|
| China/Russia/Central Asia | 380V / 6000V | 50Hz |
| Middle East/SE Asia/Africa | 400V / 415V / 6.6kV | 50Hz |
| South Korea | 380V / 6.6kV | 60Hz |
| Americas (if needed) | 440V / 480V / 4.16kV | 60Hz |
5. Core Component Selection
| Component | Common Brands | Features & Applications |
|---|---|---|
| Motor | ABB, Siemens | HV motor IP55, Ex d IIC T4 for haz. areas |
| Mech. Seal | John Crane, Burgmann | Cartridge type, with API 682 flush plan |
| Bearing | SKF, NSK, MRC | Heavy-duty roller/thrust, forced lube |
| Coupling | Koplex, Domestic disc | Disc type, compensates thermal misalignment |
| Auxiliary piping | Custom | Flush, drain, cooling water connections |
6. Typical Application Fields
Petroleum Refining: crude/vacuum tower-bottom, slurry and coker pumps · Basic Chemicals: concentrated sulfuric acid, caustic soda, high-temperature molten salt · Polysilicon/PV: high-temperature chlorosilicic acid and SiCl4 transfer · Coal Chemical: high-temperature/high-pressure black and ash water transfer
7. Design Standards & Certifications
| Standard | Description |
|---|---|
| API 610 (11th/12th Ed.) | Centrifugal pumps for petroleum, petrochemical, natural gas |
| GB/T 3216-2016 | Rotodynamic pumps performance acceptance tests |
| ISO 9001:2015 | Quality Management System |
| ASME B16.5 | Flange standard (optional for Americas) |
| CE / EAC / GOST-R | Available upon request |
8. Customizable Options
| Option | Details |
|---|---|
| Wetted parts material | CS/316L/Duplex 2205/Hastelloy C276/Titanium |
| Seal flush plan | Plan 11 (self-flush) / Plan 21 (cool flush) / Plan 52 (dual seal external flush) |
| Motor type | LV/HV (6kV/6.6kV) / VFD / Ex-proof |
| Coupling | Elastic pin / Disc / Hydraulic coupling |
| Monitoring | Vibration probe, axial displacement, bearing temp detection |
| Aux. systems | Seal flush filter system, forced lube oil console |
9. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| New Equipment | 12 Months | Casing, impeller, shaft, bearing housing, seal, motor |
| Refurbished Equipment | 6 Months | Casing, impeller, shaft, bearing housing, seal, motor |
| Idle Equipment (As-is) | 3 Months | Main functional parts |
Note: Seal friction parts are wear parts. Final terms subject to contract. All orders include installation guidance and remote debugging.
10. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Pump Body | Bare with steel straps or wooden box |
| Motor | Wooden box |
| Aux. piping/Baseplate | Bare or wooden box |
| Spare parts | Wooden or carton box |
Container Estimation: Medium (≤110kW) approx. 1～2 units/20'GP or 40'HQ; Large (>110kW) usually break-bulk or flat rack. Installation: On-site guidance; large units recommend technicians on-site (travel & accommodation borne by buyer).
11. Information Required for Quotation
Medium name, concentration, temperature, density and solids content; flow, head and NPSHa; design pressure/temperature; preferred flush plan (Plan 11/21/52); wetted-parts material; Ex-proof/HV requirements; local voltage/frequency; equipment status: new/refurbished/idle; terms: FOB/CIF/DDP; destination port/address.