Introducing our SLZ end suction, long coupled, single stage centrifugal chemical process pump, a masterpiece engineered to the rigorous standards of EN 22858 / ISO 2858. This pump stands as a versatile powerhouse, tailored to meet the diverse demands of both industrial and marine sectors. Its design facilitates the transfer of low viscosity clean or slightly contaminated fluids, free from solid or fibrous debris. From fresh water and sea water to various fuels such as diesel, petrol, and kerosene, this pump handles them all with finesse. It excels in applications ranging from fuel transfer and chemical processing to energy plant operations, mining, firefighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine endeavors.
Crafted for endurance, this is a robust centrifugal chemical process pump boasting high flow and pressure capabilities, making it ideal for heavy-duty operations.
Experience the numerous advantages of our long coupled centrifugal chemical process pump design, a hallmark of engineering excellence.
The long coupled configuration offers exceptional maintenance ease, allowing effortless access to the pump head without disengaging the motor.
Engineered for durability, this process pump is designed for non-stop operation with additional bearings in the pump head, significantly reducing motor strain during use.
Featuring a back pull-out design, this pump allows the motor to be detached while keeping the pump connected to the pipework, saving valuable time during maintenance.
With independent shafts for the pump and motor, only the pump shaft needs replacement if damaged, unlike less robust models that require whole motor replacement upon shaft failure.
The long coupled design provides ample space between the pump and motor, safeguarding the motor from fluid ingress in the event of seal failure.
Product Summary
• Capable of handling a diverse range of clean low viscosity or slightly contaminated fluids with ease.
• Offers options for closed or semi-open impellers to suit your specific needs.
• Designed with a back pull out feature for swift and straightforward maintenance.
• Operates efficiently with a maximum fluid temperature threshold of 175°C.
• Equipped with a heavy-duty shaft that remains untouched by the fluid.
• External seal cooling system available for enhanced operational safety.
• Built with separate pump and motor shafts for simplistic maintenance.
• Available in materials such as cast iron, 316 stainless steel, duplex stainless steel, bronze, and others upon request.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with flanges per EN 1092-1 / PN 16 for steel and stainless steel casings.
• Choose from gland packing or single, double, and cartridge mechanical seal options.
• Available with three-phase 50Hz / 60Hz motors, IP55 standard.
• ATEX version can be requested for specialized applications.
• Independent certification is available upon request, ensuring top-tier quality.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards.
• Features low NPSH for efficient fluid handling.
• Designed for seamless assembly without alignment hassles.
• All impellers are meticulously balanced to ISO 1940 class 6.3 guidelines.
• Long coupled with a sturdy baseplate ensuring stability.
• An API Seal can be installed, conforming to API682 standards.
• Incorporates oil-lubricated ball bearings for superior durability.
| 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 |
Incorporating Renowned Bearings: Our centrifugal and chemical pumps are equipped with famous-brand bearings, ensuring unparalleled durability and longevity even in the most challenging environments. Expect your pumps to deliver outstanding performance over an extended lifespan, thanks to these top-tier components.
Mastering Axial Thrust Balance: Our pumps are engineered with precision to manage axial thrust effectively. Most impellers feature wear rings at both the front and back, complemented by a balance hole on the back shroud. For pumps with minimal axial thrust, these components may not be included, ensuring customized efficiency without unnecessary elements.
High-Precision Casting Impeller: Our impellers, available in cast iron, stainless steel, and bronze, are crafted with high-precision casting techniques. This meticulous process guarantees peak performance and reliability, providing you with the ultimate pumping power.
Explore Two Principal Groups: Delve into the strategic design of our pumping solutions, categorized into two main groups that enhance operational efficiency.
1) "Flush" System: Enhance seal performance with our flush system, injecting clean, cool liquid into the seal chamber. This innovative setup features a secondary, downward-oriented port for leak observation or venting, optimizing the seal's operating conditions for peak efficiency.
2) "Barrier or Buffer" System: Elevate safety and seal cooling with our dual-seal configuration, employing a secondary fluid to isolate the pumped fluid from ambient air. This advanced design not only enhances cooling but also boosts safety and performance for demanding applications.
Note on Mechanical Seals: It's important to highlight that not all mechanical seals necessitate specialized external flush systems. Our pumps are designed with versatility in mind, accommodating various sealing needs seamlessly.
Flexible Couplings: Versatile and Efficient! Our flexible couplings are designed to adapt to movement such as vibrations and thermal expansion, providing superior protection against misalignment. Enjoy reduced noise and enhanced longevity with these advanced components, ideal for dynamic applications.
Flexible Couplings Explained: Unlike rigid couplings, flexible couplings handle vibrations and thermal expansion effortlessly, safeguarding against misalignment damage. Their ability to absorb vibrations makes them perfect for noise reduction, though they come with a more intricate design. The long-term maintenance savings from protecting shafts and bearings justify the investment.
Premium API Standard Couplings: Semhai's API standard chemical pumps utilize API 671 Standard Disc Couplings, renowned for their superior quality. Experience minimized reaction loads and enhanced power transmission efficiency, elevating your entire pump system's performance.
Superb Efficiency with API Couplings: Our API Standard Disc Couplings offer lower reaction loads and superior balancing quality, far surpassing standard couplings. This translates to improved effectiveness and efficiency in power transmission throughout your pump system, ensuring optimal operational success.
| 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 cemented strategic, long-term partnerships with several leading domestic pump-testing institutions, ensuring the highest standards of product reliability and performance. Our esteemed partners include:
The prestigious National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shenyang City,
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial situated in Zhenjiang City,
The esteemed Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City,
And the distinguished Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, among others.
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