Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump, perfectly engineered to meet EN 22858 / ISO 2858 standards. This versatile pump caters to a broad spectrum of applications across industrial and marine sectors. Designed for reliability, it effortlessly handles low viscosity clean or slightly contaminated fluids, making it ideal for pumping fresh water, sea water, and fuels such as diesel, petrol, and kerosene. Experience seamless operations in fuel transfer, chemical processes, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine-related activities.
Behold a robust and powerful centrifugal chemical process pump designed for demanding tasks, boasting high flow and pressure capabilities to tackle even the toughest industrial challenges.
The long coupled centrifugal chemical process pump design offers a host of advantages for your operations.
Maintenance is a breeze with the long coupled configuration, allowing easy access to the pump head without the need to remove the motor, ensuring minimal downtime and disruption.
Engineered for durability and constant use, this process pump features additional bearings installed within the pump head, drastically reducing operational strain on the motor for continuous performance.
The innovative back pull out design allows for swift and effortless motor removal while the pump remains connected to the pipework, significantly cutting down service and maintenance time.
Featuring independent shafts for both pump and motor, this design ensures that only the pump shaft needs replacement if broken, unlike other models that necessitate a full motor replacement, enhancing cost-effectiveness and ease of maintenance.
The strategic long coupled design creates ample space between the pump and motor, safeguarding the motor against fluid ingress during a seal failure, promoting longevity and reliability.
Product Summary
• Capable of handling a wide array of clean, low viscosity, or slightly contaminated fluids with efficiency.
• Available with a choice of closed or semi-open impellers to suit your specific needs.
• Back pull out design ensures quick, hassle-free maintenance, minimizing downtime.
• Handles maximum fluid temperatures up to a scorching 175°C with ease.
• Equipped with a heavy-duty shaft that remains untouched by the fluid, enhancing durability.
• Optional external seal cooling system to maintain optimal performance.
• Features independent pump and motor shafts for simplified upkeep and longevity.
• Available in a variety of materials, including cast iron, 316 stainless steel, duplex stainless steel, bronze, and custom materials upon request.
• Suction and discharge flanges conform to EN 1092-2 / PN 16 standards, with options for steel and stainless steel casings as per EN 1092-1 / PN 16.
• Choose from gland packing or single, double, and cartridge mechanical seal options for optimal sealing.
• Equipped with three-phase motors, compatible with 50Hz / 60Hz, and IP55 rated as standard.
• ATEX version available upon request for use in explosive environments.
• Independent certification is obtainable upon request, ensuring compliance and quality assurance.
• Manufactured in accordance with the robust specifications of EN 22858 / ISO 2858 standards.
• Designed to operate with low NPSH for enhanced efficiency and reliability.
• Assembly without alignment simplifies installation and reduces setup time.
• All impellers are meticulously balanced to ISO 1940 class 6.3 standards for smooth, reliable operation.
• Long coupled design with baseplate for secure and stable installation.
• API Seal installation available, compliant with API682 standards for superior sealing solutions.
• Oil-lubricated ball bearings ensure minimal friction and extended operational lifespan.
| 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 are engineered with precision, incorporating renowned brand bearings to deliver unparalleled performance. Designed for longevity, these pumps excel even in the most challenging and demanding environments.
To expertly counterbalance axial thrust, our impellers are crafted with wear rings strategically placed both in front and at the back, complemented by a balance hole on the rear shroud. In cases where axial thrust is minimal, the design efficiently omits the need for these components, ensuring smooth operation.
Our impellers are a testament to high-precision casting, guaranteeing optimal performance. Available in robust materials such as cast iron, stainless steel, and bronze, they are engineered for reliability and strength.
Our system is categorized into two principal groups:
1) "Flush" - This technique injects a pristine, cooling liquid into the seal chamber, significantly enhancing the operational conditions. A secondary, downward-facing port serves as a critical point for leakage monitoring or venting, ensuring safety and efficiency.
2) "Barrier or Buffer" for dual seals - Here, a secondary fluid is introduced between two mechanical seals, effectively preventing ambient air from compromising the pumped fluid. This method not only improves seal cooling but also elevates safety standards.
It's important to note that many mechanical seals function without the necessity for additional external flush systems.
Versatile Couplings
Flexible couplings distinguish themselves from rigid counterparts by accommodating movement such as vibrations and thermal expansion. This adaptability makes them perfect for applications with unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations significantly reduces operational noise. Despite the more intricate and costly design, the long-term benefits include reduced shaft and bearing damage, culminating in maintenance savings.
Shanghai Semhai's chemical pumps adhere to the esteemed API 671 Standard, employing superior Disc Couplings for unmatched performance.
Our pumps are equipped with couplings that exhibit lower reaction loads, offering superior balancing quality over traditional couplings. This ensures enhanced efficiency and efficacy in total pump power transmission, setting new standards in performance.
| 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
In an effort to ensure the highest quality and reliability, Shanghai Semhai Pump Co., Ltd. has cultivated enduring partnerships with several prestigious domestic pump-testing institutions that lead the industry, such as:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shenyang City,
The distinguished Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City,
The renowned Ministry of Agriculture, Water Pump Quality Supervision and Testing Center situated in Chongqing City,
and the highly regarded Shanghai Mechanical and Electrical Products Quality Inspection Center nestled in the heart of Shanghai City, among others.
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