Centrifugal chemical process pumps serve as key equipment in the chemical industry, where those chemical pumps are routinely employed to manage aggressive, toxic, and high-risk fluids. Applications include chemical transfer, acid recirculation, solvent recovery, and wastewater processing. Their chemical compatibility and reliability render them indispensable across chemical processing plants, petroleum refineries, and pharmaceutical production units.
In chemical processing, centrifugal chemical process pumps are a preferred choice for transporting corrosive liquids with high efficiency. Their robust design ensures consistent flow rates even when handling corrosive or hazardous media. Below are the key features of our chemical centrifugal pumps in chemical applications:
■ Closed impellers lead to high efficiency.
■ Pumps with closed impeller are designed to transfer clean or fluid contains particles,easy crystallize,precipitate working conditions.
■ Rear door,no need to disassemble the suction and discharge pipeline during maintenance.
■ Special self-locking impeller nut,to eliminate the risk of release.
■ Thickened heavy duty shaft，lengthen bearing space to improve the operation stability.
■ Compound bearing protector.
Centrifugal chemical process pumps mainly consist of three main sections: the wetted part, power end, and shaft sealing system. Below are the breakdowns of each part of such chemical centrifugal pumps:
■ The Pump body adopts axial suction, radial discharge and foot support Type, which is directly fixed on the base.It is a chemical centrifugal pump of horizontal,single stage,end suction,cantilever design.It is also called single stage end suction back pull type chemical process pump.
■ Straight cone suction chamber, uniform speed field, small hydraulic loss, suction chamber with guide plate, reduce liquid flow circumferential spin, reduce head loss, improve efficiency
■ Large pump adopts double volute design, reduce radial force,abrasion resistant, pump vibration is small, smooth operation.
■ Optimized impeller design, there are open, semi-open, closed impeller optional, wide applicability of conveying medium
■ Impeller back blade design, reduce the axial force, keep the solid phase away from the machine sealing cavity, improve the service life of the machine sealing.
The pump structure is as follows
1.Pump casing 2.Impeller 3.Pump cover 4.Mechanical seal 5.Seal end gland 6.Wear sleeve 7.Front bearing gland8.Front bearing
| 9. Bearing housing 10. Shaft 11. Air vent cover 12. Back bearing 13. Back bearing gland 14. Pump coupling 15. Bracket 16.Pipe plug | 17. Oil-analysis standard 18. Skeleton oil seal 19. Skeleton oil seal 20. O ring of seal end gland 21. Pump cover washer/O ring 22. O ring of impeller 23. O ring of impeller nut 24. Impeller nut |
Chemical process centrifugal pumps are normally made from different materials to withstand corrosive, abrasive, and even hazardous fluids. Common metallic materials for those corrosion resistant centrifugal pumps including austenitic stainless steels (304/316), duplex/super duplex steels (2205/2507), nickel alloys (Hastelloy C276, Alloy 20), and titanium for highly corrosive services. Non-metallic materials like PP, PVDF, FEP linings are adoptd to handle aggressive acids and solvents at temperatures, but PFA lining pumps are able to handle high temperature acids or alkali solutions.
| No. | Description | Material |
| Anti-corrosion alloy | Cast steel | Stainless steel |
China standard | ASTM standard | China standard | ASTM standard | China standard | ASTM standard |
| 1 | Pump casing | 20# Alloy Titanium Nickel 904L Ti/Pd Alloy Monel
| Hastelloy Monel Ⅱ-B Ⅱ-C Ni-Resist1 Ni-Resist2 Ni-Resist3 | 25# 35# | WCA WCB | ZG1Cr13 ZG2Cr13 ZG00Cr18Ni10 ZG0Cr18Ni9 ZG0Cr18Ni12Mo2Ti ZG0Cr17Ni4CuNb ZG1Cr18Ni9 ZG1Cr18Ni9Ti ZG00Cr17Ni14Mo2 0Cr26Ni5Mo2 0Cr17Mn13Mo2N 00Cr18Ni5Mo3Si2 | CA-15 CA-15M CF-3(SS304L) CF-8(SS304) CF-8M(SS316) CF-3M(SS316L) CN-7M(SS320) CD-4MCu 2205
|
| 2 | Sealing ring |
| 3 | Impeller |
| 4 | Pump cover |
| 5 | Impeller nut |
| 6 | Cartridge seal |
| 7 | Shaft | Carbon steel SS420 2205 SS304 SS316 |
| 8 | Bearing Housing | Cast iron |
Material of construction:
Pump casing: Cast iron/ Carbon steel /Stainless steel SS304/ SS316/ SS316L /Duplex stainless steel 2205 2507 CD4MCu 904L / Titanium / Nickel / Hastelloy /Monel...
Impeller: Cast iron/ Carbon steel /Stainless steel SS304/ SS316/ SS316L /Duplex stainless steel 2205 2507 CD4MCu 904L / Titanium / Nickel / Hastelloy /Monel...
Centrifugal chemical process pumps typically feature a horizontal, end-suction design with back pull-out capability for easy maintenance. However, due to the high customizable features, we have quite different configuration for our chemical centrifugal pumps as below:
| Item | Factory standard | Optional configurations |
| Motor |  | Reputed China brands | ABB, Siemens, Nanyany, Jiamusi or designated brands |
| Bearing |  | Reputed China brand | SKF, NSF, FAG or designated brands |
| Mechanical seal |  | Zigong brand | Burgmann, Sihuan Riji, Chengdu Yitong |
| Flanges&counter flanges |  | China standard | European std, German std, American std, Japanese std |
| Couplings |  | Pin type | Flexible diaphragm coupling |
Our Chemical process pumps are widely used for transferring corrosive, toxic, or high-purity fluids in industries like petrochemical, pharmaceutical, and wastewater treatment. Those corrosive resistant chemical centrifugal pumps are able to handle acids, alkalis, solvents, and abrasive slurries in processes including dosing, circulation, filtration, and reactor feeding.
■ Alkali and inorganic salts
■ Strong Alkali/Strong Caustic Soda
■ Metallurgy
■ Iron and steel industry
■ Acid industry
■ Petrochemical
■ Fertilizer
■ Fermentation
■ Environment protection
