Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump, meticulously crafted to meet the EN 22858 / ISO 2858 standards. This versatile machine is your go-to solution across a spectrum of industrial and marine applications. Engineered for excellence, it effortlessly handles low viscosity clean or slightly tainted fluids, ensuring smooth operation without the interference of solid particles or fibrous materials. Ideal for transporting fresh water, seawater, and an array of fuels such as diesel, petrol, and kerosene, its applications are vast. From fuel transfer to chemical processing, from energy plants to mining operations, and from fire fighting to irrigation – this pump is your reliable partner in water supply, treatment, pressurization, grey water management, dewatering, and marine endeavors.
This substantial and robust centrifugal chemical process pump stands out with its impressive high flow and high pressure capabilities, setting new benchmarks in performance and reliability.
Discover the numerous advantages of the long coupled centrifugal chemical process pump design, offering an enhanced operational experience.
Experience the convenience of maintenance with the long coupled configuration. Its design allows effortless access to the pump head without dismantling the motor, making upkeep straightforward and efficient.
Built for durability, this process pump is engineered for continuous operation. Additional bearings in the pump head mitigate the load on the motor, ensuring enduring performance and reduced wear.
The innovative back pull out design allows the motor to be detached while keeping the pump connected to the pipeline, facilitating time-efficient servicing and maintenance.
With independent shafts for the pump and motor, only the pump shaft requires replacement in case of breakage, unlike other models where shaft failure necessitates a full motor replacement.
The long coupled design provides ample space between the pump and motor, safeguarding the motor from potential fluid ingress during seal failures, thus enhancing its longevity.
Product Summary
• Capable of handling a diverse range of clean, low viscosity, or slightly contaminated fluids with ease.
• Choose between closed or semi-open impeller designs for optimized performance.
• Quick and effortless maintenance facilitated by the back pull out design.
• Capable of withstanding a maximum fluid temperature of up to 175°C.
• Heavy duty shaft design prevents contact with pumped fluid, ensuring durability.
• Optional external seal cooling system available to enhance performance.
• Independent pump and motor shafts offer ease of maintenance and minimize downtime.
• Available in materials such as cast iron, 316 stainless steel, duplex stainless steel, and bronze, with more options upon request.
• Suction and discharge flanges comply with EN 1092-2 / PN 16; options for steel and stainless steel casings conform to EN 1092-1 / PN 16.
• Flexible sealing options include gland packing or single, double, and cartridge mechanical seals.
• Equipped with three-phase motors (50Hz / 60Hz), IP55 standard.
• ATEX versions available upon request for environments requiring explosion protection.
• Independent certification can be provided upon request, ensuring compliance and quality.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards for assurance of quality.
• Low NPSH characteristics minimize the risk of cavitation, enhancing pump efficiency.
• Simplified assembly process, eliminating the need for meticulous alignment.
• All impellers are precision-balanced as per ISO 1940 class 6.3 for optimal performance.
• Long coupled design with a sturdy baseplate for enhanced stability during operation.
• Optional API Seal installation available, conforming to API682 standards.
• Features oil-lubricated ball bearings for smooth operation and extended service life.
| Pump Type |
Centrifugal |
| Max Flow Rate |
1500M³H |
| Max Head |
160M |
| Max Temp |
175°C |
| Max Viscosity |
200 cst |
| Max Solid Passage |
20mm |
| Self Priming |
N |
| Inlet/Outlet Sizes |
32mm to 250mm |
| Mechanical seal type |
Double mechanical seal, API plan |
| Pump Materials |
AISI304, AISI316, AISI316L, Bronze, Cast Iron, Cast Steel, Ductile Iron, Duplex, NiAl Bronze, Super Duplex |
Our centrifugal and chemical pumps proudly incorporate renowned brand bearings, ensuring exceptional longevity and reliability even under the most demanding operating conditions. Enjoy the confidence of extended service life with Shanghai Semhai Pump Co., Ltd.
To meticulously counteract axial thrust, most impellers are equipped with wear rings both at the front and back, complemented by a balance hole on the rear shroud. In cases where axial thrust is minimal, the innovative design eliminates the need for a rear wear ring and balance hole.
Our high-precision casting impellers are crafted to perfection, guaranteeing optimal performance. Available in robust materials such as cast iron, stainless steel, and bronze, these impellers exemplify strength and durability.
Our offerings are categorized into two primary groups:
1) "Flush" - This method injects clean, cool liquid into the seal chamber, enhancing the operational environment. An additional smaller port, typically oriented downward, serves as a leakage observation point or vent, ensuring optimal performance and safety.
2) "Barrier or Buffer" with dual seals - A secondary fluid is introduced between dual mechanical seals, preventing ambient air from contacting the liquid being pumped. This setup not only improves seal cooling but also enhances overall safety.
It's noteworthy that numerous mechanical seals function efficiently without the need for external flush arrangements, offering simplicity in design and operation.
Flexible Couplings
In contrast to rigid couplings, flexible couplings adeptly manage movement such as vibrations and thermal expansion, mitigating potential damage. Ideal for scenarios with unavoidable misalignment between drive and pump shafts, they also reduce noise due to their vibration-absorbing capabilities. Though more complex and costly, flexible couplings offer long-term maintenance savings by safeguarding shafts and bearings from early deterioration.
Semhai's API standard chemical pumps feature the prestigious API 671 Standard Disc Couplings, exemplifying engineering excellence and reliability.
These couplings boast lower reaction loads and superior balancing quality compared to standard couplings, enhancing overall efficiency and effectiveness in pump power transmission.
| Industry |
Services |
| Chemicals, dyes & intermediates |
Organic/inorganic chemicals |
| Oil extraction & waste oil refineries |
Hydrocarbons/Volatile liquids |
| Bulk drugs & Pharmaceuticals |
Dyes & Intermediates |
| Effluent treatment plants |
Water treatment & distribution system |
| Heating & air conditioning plants |
Thermic fluid/ hot oil |
| Cooling towers |
Corrosive/abbrasive liquids |
Professional Cooperation Agencies:
Partner with prestige! At Shanghai Semhai Pump Co., Ltd., we pride ourselves on our network of esteemed collaborators who share our commitment to excellence in pump technology.
This company has established long-term cooperation relationships with a number of large domestic pump-testing institutions, such as:
Shanghai Semhai Pump Co., Ltd. has forged robust alliances with top-tier domestic pump-testing institutions, ensuring the superior quality and reliability of our products.
National Quality Supervision and Inspection Center of Industrial Pumps (Tiexi District, Shengyang city),
We proudly partner with the National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang city, a beacon of excellence in industrial pump quality oversight.
Irrigation Machinery Products Quality Inspection Center of Machinery Industrial (Zhenjiang City),
Our collaboration with the Irrigation Machinery Products Quality Inspection Center in Zhenjiang City guarantees unmatched precision in quality validation of our irrigation machinery.
Ministry of Agriculture, Water Pump Quality Supervision and Testing Center (Chongqing city),
We maintain a pivotal alliance with the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing city, underscoring our dedication to agricultural innovation.
Shanghai Mechanical and Electrical Products Quality Inspection Center (Shanghai city) and so on.
With our esteemed association with the Shanghai Mechanical and Electrical Products Quality Inspection Center, located in the heart of Shanghai, we affirm our commitment to excellence and precision in mechanical and electrical pump solutions.
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