The SLZ end suction, long coupled, single stage centrifugal chemical process pump is a marvel of engineering, built to the rigorous standards of EN 22858 / ISO 2858. This pump is the embodiment of versatility, seamlessly adapting to an extensive range of applications in both industrial and marine markets. It is specifically crafted to handle low viscosity fluids, whether pristine or slightly tainted, with grace and precision, excluding those with solid or fibrous particulates. Its fluid repertoire includes fresh water, sea water, and an array of fuels such as diesel, petrol, and kerosene. This pump is pivotal in applications like fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
This robust and imposing centrifugal chemical process pump is designed for greatness, offering high flow and high pressure capabilities to meet the most demanding industrial challenges.
The ingenious long coupled centrifugal chemical process pump design boasts numerous advantages, making it a standout choice in the industry.
One of the key benefits of the long coupled configuration is its remarkable ease of maintenance, allowing the pump head to be accessed effortlessly without displacing the motor.
Engineered for relentless performance, this process pump is fortified with additional bearings in the pump head. This thoughtful design detail alleviates much of the operational strain from the motor, ensuring durability and continuous use.
The back pull out design is a marvel of convenience, enabling the motor to be detached while the pump remains connected to the pipework. This innovation significantly reduces downtime during maintenance or servicing.
With independent shafts for the pump and motor, this centrifugal chemical process pump ensures that only the pump shaft requires replacement if damaged, sparing the motor. In contrast, other less robust pumps necessitate total motor replacement for shaft issues.
A spacious gap between the pump and motor characterizes the long coupled design, safeguarding the motor from fluid exposure in the event of a seal failure.
Product Summary
• Expertly crafted to manage an extensive variety of clean low viscosity or slightly contaminated fluids with proficiency.
• Offers the flexibility of a closed or semi-open impeller to suit diverse needs.
• Equipped with a back pull out design to guarantee swift and straightforward maintenance.
• Capable of handling maximum fluid temperatures up to a scorching 175°C.
• Features a robust heavy-duty shaft expertly designed to remain untouched by the fluid it manages.
• Optional external seal cooling system to enhance operational efficiency.
• Incorporates independent pump and motor shafts for optimized durability and maintenance.
• Available in a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and others upon request, ensuring adaptability to specific needs.
• Conforms to EN 1092-2 / PN 16 for suction and discharge flanges, with EN 1092-1 / PN 16 standards for steel and stainless steel casings.
• Offers a range of seal options including gland packing, single, double, and cartridge mechanical seals for customized sealing solutions.
• Equipped with three-phase 50hz / 60hz motors, with IP55 protection as standard to ensure reliable performance.
• Available in an ATEX version upon request for hazardous environments.
• Independent certification can be provided upon request to assure compliance with the highest standards.
• Meticulously manufactured in accordance with the esteemed EN 22858 / ISO 2858 standards.
• Designed with low NPSH characteristics to prevent cavitation and ensure smooth operation.
• Facilitates assembly without the need for alignment, streamlining the installation process.
• Every impeller is expertly balanced according to the rigorous ISO 1940 class 6.3 standards for optimal performance.
• Features a long coupled design with a robust baseplate for enhanced stability and durability.
• Can accommodate an API Seal, compliant with API682 standards, for specialized sealing needs.
• Equipped with oil lubricated ball bearings for smooth and efficient operation.
| 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 pumps and chemical pumps integrate renowned brand bearings, delivering unmatched durability and longevity. Even under the most challenging conditions, expect our pumps to perform exceptionally, ensuring a longer service life that surpasses expectations.
To expertly balance axial thrust, our pumps feature wear rings both at the front and back of the impeller, complemented by a balance hole on the impeller's back shroud. In instances where axial thrust is minimal, these components may be omitted, showcasing our tailored engineering solutions.
Our high-precision casting impellers are crafted to guarantee optimal performance. Available in materials like cast iron, stainless steel, and bronze, these impellers exemplify excellence and reliability.
Explore the Two Main Groups of Seal Arrangements:
1) "Flush" Technique: Infusing clean, cool liquid into the seal chamber enhances the operational environment. Additionally, a second, smaller, downward-oriented port serves as a leakage observation or vent opening, ensuring peak performance.
2) "Barrier or Buffer" for Dual Seals: This method introduces a secondary fluid between two sets of mechanical seals. It prevents ambient air from contact, improves seal cooling, and elevates safety standards.
It's noteworthy that not all mechanical seals necessitate special external flush arrangements, offering flexibility for various applications.
Flexible Couplings: The Cornerstone of Versatility
Unlike their rigid counterparts, flexible couplings accommodate movement such as vibrations and thermal expansion effortlessly, making them perfect for scenarios with unavoidable misalignment between drive and pump shafts. They excel in absorbing vibrations, reducing operational noise, and offering long-term maintenance savings despite their intricate design, thereby protecting shafts and bearings from premature wear and damage.
Our Semhai API standard chemical pumps are equipped with the superior API 671 Standard Disc Couplings.
Enjoy lower reaction loads paired with advanced balancing quality, resulting in enhanced efficiency and effectiveness in the entire pump power transmission system.
| 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
Shanghai Semhai Pump Co., Ltd. has cultivated prestigious and enduring partnerships with several esteemed domestic pump-testing institutions. Our alliances include:
The National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City, renowned for its rigorous standards and state-of-the-art testing facilities.
The prestigious Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, known for its expertise in quality assurance and industry-leading inspection technology.
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, a beacon of excellence in agricultural pump quality testing.
The Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, offering cutting-edge inspection services for mechanical and electrical products. Our collaborations ensure superior product performance and reliability.
Audited Supplier 
){kind=link}