Introducing the versatile SLZ end suction pump: a long coupled, single stage centrifugal chemical process pump meticulously standardized to EN 22858 / ISO 2858. A true workhorse in both industrial and marine settings, this pump excels in handling low viscosity clean or slightly contaminated fluids, safeguarding against solid or fibrous contaminants. Seamlessly pump fluids like fresh water, sea water, and a range of fuels including diesel, petrol, and kerosene. Its diverse applications span across fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurisation, grey water management, dewatering, and marine operations.
Presenting a powerhouse in the realm of centrifugal chemical process pumps, this robust machine boasts exceptional high flow and high pressure capabilities, perfect for tackling the most demanding industrial tasks.
Discover the myriad advantages of our innovative long coupled centrifugal chemical process pump design, crafted for efficiency and reliability.
Ease of maintenance is a hallmark of our long coupled configuration, allowing effortless access to the pump head without the tedious task of removing the motor.
Built to endure, this process pump is engineered for unwavering continuous use. With additional bearings installed in the pump head, it remarkably minimizes strain on the motor, ensuring enhanced longevity.
The ingenious back pull out design revolutionizes maintenance—effortlessly remove the motor while the pump remains connected to the pipework, significantly reducing downtime during service operations.
Featuring independent shafts for both pump and motor, our centrifugal chemical process pump guarantees that only the pump shaft requires replacement if broken. Many competitors use the motor shaft, leading to costly motor replacements upon shaft failure.
The spacious long coupled design strategically positions a large gap between pump and motor, providing superior protection against fluid ingress in the unlikely event of a seal failure.
Product Summary
• Expertly engineered to handle a wide array of clean, low viscosity or slightly contaminated fluids with ease.
• Choose between closed or semi-open impeller designs for optimal performance.
• Simplified maintenance courtesy of the back pull out design, ensuring quick and hassle-free servicing.
• Capable of handling fluids with temperatures soaring up to 175°C.
• Features a heavy-duty shaft designed to remain untouched by the fluid, enhancing durability.
• Option for an external seal cooling system elevates operational efficiency.
• Enjoy the reliability of independent pump and motor shafts.
• Constructed from a selection of materials including cast iron, 316 stainless steel, duplex stainless steel, and bronze, with additional options available upon request.
• Suction and discharge flanges meet the rigorous standards of EN 1092-2 / PN 16, with EN 1092-1 / PN 16 specifications for steel and stainless steel casings.
• Versatile seal options available: gland packing or single, double, and cartridge mechanical seals.
• Equipped with three-phase 50hz/60hz motors standard at IP55.
• ATEX version can be provided upon request, ensuring safety in explosive environments.
• Independent certification available upon request, affirming product quality and reliability.
• Precision manufactured in full compliance with EN 22858 / ISO 2858 standards.
• Engineered for low Net Positive Suction Head (NPSH), optimizing operational efficiency.
• Simplified assembly process requires no alignment, enhancing setup efficiency.
• All impellers meticulously balanced to ISO 1940 class 6.3, ensuring smooth operation.
• Crafted for excellence with a long coupled baseplate design.
• Option for API Seal installation, aligning with API682 standards for added reassurance.
• Durable oil-lubricated ball bearings enhance operational stability and longevity.
| 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 take advantage of renowned brand bearings, ensuring exceptional durability and longevity even in the most challenging operational conditions. Experience extended service life for your equipment, enhancing reliability and performance across the board.
To expertly balance axial thrust, most impellers feature precision-engineered wear rings both at the front and rear, complemented by a strategically placed balance hole on the back shroud. In certain cases where axial thrust is minimal, these components may not be necessary, ensuring a streamlined and efficient design.
Crafted with high-precision casting, our impellers promise superior performance and reliability. Available in materials such as cast iron, stainless steel, and bronze, they are designed to meet the highest standards of excellence and durability.
Our products are generally categorized into two main groups:
1) "Flush" - This technique introduces clean, cool liquid into the seal chamber, optimizing the operational environment. A secondary, often downward-oriented port serves as a convenient leakage observation point or vent, enhancing functionality and maintenance.
2) "Barrier or Buffer" for dual seals - A secondary fluid is introduced between two mechanical seals, effectively preventing ambient air contact with the pumped fluid. This method not only improves seal cooling but also significantly enhances safety.
It's important to note that not every mechanical seal mandates a specialized external flush setup, offering flexibility in design and application.
Flexible couplings
Flexible couplings stand out for their ability to accommodate movement such as vibrations and thermal expansion, unlike their rigid counterparts. Ideal for scenarios with inherent misalignment between drive and pump shafts, these couplings effectively absorb vibrations, minimizing operating noise. While they boast a more intricate, costlier design, the maintenance savings due to reduced damage and wear to shafts and bearings make them a valuable investment.
Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings, setting a benchmark in quality and performance.
These couplings offer reduced reaction loads and superior balancing quality compared to standard couplings, 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 |
Elite Professional Cooperation Agencies: Your Trusted Partners in Success
Our company, Shanghai Semhai Pump Co., Ltd., has proudly forged enduring partnerships with numerous prestigious domestic pump-testing institutions, ensuring the highest standards of quality and innovation.
We collaborate closely with the National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shenyang City, a leading authority in pump quality assurance.
Our partners include the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, renowned for its rigorous quality assessments.
We are aligned with the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, a testament to our commitment to agricultural innovation and quality.
Our cooperation extends to the Shanghai Mechanical and Electrical Products Quality Inspection Center, located in Shanghai City, maintaining our reputation for excellence and reliability.
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