Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump: a paragon of engineering excellence adhering to EN 22858 / ISO 2858 standards. This versatile powerhouse serves diverse industrial and marine applications, seamlessly handling low viscosity, clean, or slightly contaminated fluids free from solid or fibrous intrusions. It excels in transferring an array of liquids such as fresh and sea water, alongside fuels like diesel, petrol, and kerosene. The SLZ pump is the preferred choice for fuel transfer, chemical processing, energy plants, mining operations, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine endeavors.
This robust centrifugal chemical process pump is designed for heavy-duty applications, boasting remarkable high flow and pressure capabilities that cater to demanding industrial needs.
The ingenious long coupled centrifugal chemical process pump design offers an array of remarkable advantages.
Experience the convenience of the long coupled configuration, where maintenance becomes a breeze. Accessing the pump head is hassle-free, eliminating the need to detach the motor.
Engineered for endurance, this process pump is fortified for continuous operation. Equipped with extra bearings in the pump head, it significantly alleviates the motor's strain during operation, ensuring durability and reliability.
The innovative back pull-out design is a game-changer, allowing for motor removal without disconnecting the pump from the pipework. This results in significant time savings during service or maintenance.
Designed with precision, the centrifugal chemical process pump and motor feature independent shafts. In the unlikely event of a pump shaft failure, only the pump shaft requires replacement. This is a significant advantage over less robust pumps that use the motor shaft, necessitating complete motor replacement if the shaft breaks.
The strategic long coupled design provides a generous gap between the pump and motor, safeguarding the motor from any fluid ingress should a seal failure occur.
Product Summary
• Expertly crafted to pump a broad spectrum of clean, low viscosity, or slightly contaminated fluids with precision.
• Available with the choice of closed or semi-open impellers to meet specific application needs.
• Back pull-out design ensures maintenance is swift and straightforward.
• Capable of handling fluid temperatures up to an impressive 175°C.
• Features a heavy-duty shaft that remains untouched by the fluid, enhancing durability.
• Equipped with an external seal cooling system to optimize performance.
• Ingeniously designed with independent pump and motor shafts for ease of maintenance.
• Constructed from durable materials like cast iron, 316 stainless steel, duplex stainless steel, bronze, with custom material requests available.
• Designed with suction and discharge flanges adhering to EN 1092-2 / PN 16, aligning with EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers a variety of sealing options including gland packing or single, double, and cartridge mechanical seals.
• Operates with three-phase 50Hz / 60Hz motors, IP55 as standard, ensuring robust performance.
• Available in ATEX-certified versions upon request, catering to specific safety requirements.
• Optional independent certification available upon request, adding an extra layer of assurance.
• Meticulously manufactured in compliance with EN 22858 / ISO 2858 standards, exemplifying quality.
• Designed for low NPSH, reducing the possibility of cavitation.
• Streamlined assembly process requires no alignment, enhancing installation efficiency.
• All impellers are meticulously balanced to ISO 1940 class 6.3, ensuring smooth operation.
• Features a long coupled design with a baseplate for stability and ease of setup.
• Compatible with API Seals, specifically API682, to meet stringent sealing standards.
• Reliable oil-lubricated ball bearings engineered for longevity and reduced maintenance.
| 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 are meticulously engineered with renowned brand bearings, ensuring extraordinary durability and extended service life, even under the most challenging conditions.
To expertly manage axial thrust, our pumps are equipped with strategically placed wear rings at the front and rear of most impellers, along with a precision-engineered balance hole on the back shroud. In pumps where axial thrust is minimal, the rear wear ring and balance hole are ingeniously omitted, optimizing design efficiency.
Our high-precision casting impellers, available in premium materials such as cast iron, stainless steel, and bronze, guarantee unparalleled performance and reliability.
Our innovative design categorizes into two primary groups:
1) "Flush" - A pristine, cooling liquid is expertly introduced into the seal chamber, enhancing the operational environment. A secondary, ingeniously positioned downward port serves as a meticulous leakage observation or vent opening, optimizing function.
2) "Barrier or Buffer" for dual seals - A secondary fluid is meticulously introduced between two mechanical seals, expertly preventing ambient air contact with the pumped fluid and optimizing seal cooling, thereby elevating safety and performance.
It's noteworthy that not all mechanical seals necessitate specialized external flush arrangements, showcasing our tailored engineering solutions.
Flexible couplings
Flexible couplings are a marvel of engineering excellence, adeptly accommodating movement such as vibrations and thermal expansion without damage, making them ideal for applications with unavoidable misalignment. Their capacity to absorb vibrations not only reduces operating noise but also extends maintenance intervals, offering substantial savings over time.
Our Semhai API standard chemical pumps are equipped with the superior API 671 Standard Disc Couplings, exemplifying excellence.
These couplings are designed with precision to achieve lower reaction loads and superior balancing quality, significantly enhancing the efficiency and effectiveness of 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 forged enduring partnerships with a range of prominent domestic pump-testing powerhouses, including:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, nestled in Tiexi District, Shenyang City,
The prestigious Irrigation Machinery Products Quality Inspection Center of Machinery Industry, located in Zhenjiang City,
The authoritative Ministry of Agriculture's Water Pump Quality Supervision and Testing Center, based in Chongqing City,
The renowned Shanghai Mechanical and Electrical Products Quality Inspection Center, situated in Shanghai City, and many more.
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