Introducing the SLZ, a state-of-the-art end suction, long coupled, single stage centrifugal chemical process pump. This sophisticated piece of engineering is standardized to EN 22858 / ISO 2858, making it the ultimate choice for an extensive range of industrial and marine applications. Specially crafted to handle low viscosity clean or slightly contaminated fluids, it ensures flawless operation without solid or fibrous contaminants. Expertly designed for pumping fresh water, seawater, and various fuels like diesel, petrol, and kerosene, it excels in diverse applications, including fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
This is a powerhouse in the realm of centrifugal chemical process pumps, boasting high flow and pressure capabilities, perfect for heavy-duty operations.
The cleverly engineered long coupled centrifugal chemical process pump design brings a host of advantages to your operations.
Maintenance has never been easier with the long coupled configuration, offering seamless access to the pump head without the need to remove the motor.
Designed for endurance, this robust process pump is built for continuous use. Thanks to additional bearings in the pump head, it significantly reduces motor strain during operation, ensuring longevity and reliability.
Experience unparalleled efficiency with the back pull out design, allowing motor removal while the pump remains connected to the pipework. This innovation not only saves time but also enhances service and maintenance processes.
With independent shafts for the centrifugal chemical process pump and motor, only the pump shaft requires replacement if it breaks, unlike less robust models that necessitate replacing the entire motor. This feature underscores our commitment to durability and cost-efficiency.
The long coupled design provides a generous space between the pump and motor, offering superior protection to the motor against fluid ingress in the event of a seal failure.
Product Summary
• Capable of pumping a vast array of clean, low viscosity, or slightly contaminated fluids with precision.
• Choose between closed or semi-open impeller options to suit your needs.
• Innovative back pull out design for swift and straightforward maintenance.
• Capable of handling fluid temperatures up to 175°C, ensuring versatile application.
• Heavy duty shaft designed to remain untouched by fluid, safeguarding its integrity.
• Optional external seal cooling system available for optimal performance.
• Features independent pump and motor shafts for enhanced reliability.
• Available in a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, and bronze, with custom materials available upon request.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, and EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers gland packing or single, double, and cartridge mechanical seal options to meet diverse requirements.
• Equipped with three-phase 50hz / 60hz motors, standard IP55 protection.
• ATEX version available upon request, catering to specific safety standards.
• Independent certification can be provided upon request, ensuring quality assurance.
• Engineered in compliance with EN 22858 / ISO 2858 standards.
• Low NPSH design ensures reduced cavitation.
• Assembly without alignment, for simplified setup.
• All impellers are meticulously balanced per ISO 1940 class 6.3 standards.
• Long coupled with a sturdy baseplate for enhanced stability.
• API Seal installation available, conforming to API682 for superior sealing solutions.
• 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 |
Renowned Brand Bearings: Our centrifugal and chemical pumps are engineered with premium-grade bearings from well-known brands, ensuring exceptional durability and reliability. These bearings are crafted to withstand even the most challenging operating conditions, delivering an extended service life for your peace of mind.
Ingenious Impeller Design: To expertly manage axial thrust, our pumps feature strategically placed wear rings both at the front and rear of the impeller. A sophisticated balance hole is incorporated into the back shroud for optimal thrust regulation. For pumps where axial thrust is minimal, the back impeller is thoughtfully designed without a wear ring or balance hole, enhancing design efficiency.
Precision-Engineered Casting: Our high-precision casting impellers are available in a selection of robust materials, including cast iron, stainless steel, and bronze. This precision engineering ensures superior performance, elevating your operational efficiency to new heights.
Discover the Two Main Groups of Sealing Techniques:
1) Innovative 'Flush' Technique: Injecting clean, cool liquid into the seal chamber transforms the operating environment. A secondary, smaller port, usually oriented downward, serves as a leak observation or vent opening, ensuring optimal performance.
2) Advanced 'Barrier or Buffer' Technique with Dual Seals: A secondary fluid is introduced between dual mechanical seals, effectively preventing ambient air from contacting the pumped fluid. This method enhances seal cooling and safety, providing a reliable barrier for heightened operational security.
Note: Not all mechanical seals require intricate external flush systems, allowing for streamlined operations.
Versatile Flexible Couplings
Flexible couplings, unlike their rigid counterparts, adeptly accommodate movement such as vibrations and thermal expansions, thereby avoiding damage. Ideal for applications with unavoidable misalignment between drive and pump shafts, these couplings also excel in minimizing operating noise through superior vibration absorption. Though they feature a more intricate and costly design, the long-term maintenance savings due to shaft and bearing protection make them a worthwhile investment.
Adopting the Semhai API Standard: Our chemical pumps integrate API 671 Standard Disc Couplings, ensuring top-tier performance and reliability.
Enhanced Power Transmission: Featuring lower reaction loads and superior balancing quality, our couplings surpass standard alternatives in efficiency and effectiveness, optimizing the entire pump power transmission process.
| 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 |
Esteemed Professional Cooperation Agencies
Shanghai Semhai Pump Co., Ltd. has forged robust, long-term partnerships with an array of prestigious domestic pump-testing institutions. Some of these esteemed partnerships include the following:
The prestigious National Quality Supervision and Inspection Center of Industrial Pumps, located in the heart of Tiexi District, Shengyang City,
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, based in the vibrant Zhenjiang City,
The highly respected Ministry of Agriculture, Water Pump Quality Supervision and Testing Center, situated in the bustling Chongqing City,
The illustrious Shanghai Mechanical and Electrical Products Quality Inspection Center, prominently positioned in Shanghai City, among others.
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