Introducing the SLZ End-Suction Long Coupled Single Stage Centrifugal Chemical Process Pump: meticulously standardized to EN 22858 / ISO 2858, this versatile pump excels across a wide spectrum of industrial and marine applications. Its exceptional design enables the seamless handling of low viscosity clean or slightly contaminated fluids, ensuring no solid or fibrous residues. Whether it's fresh water, sea water, or fuels like diesel, petrol, and kerosene, this pump is your go-to solution. It thrives in diverse applications ranging from fuel transfer, energy plants, mining, fire fighting, irrigation, water supply, and treatment, to pressurization, grey water, dewatering, and marine applications.
Engineered for peak performance, this is a robust and large centrifugal chemical process pump, designed to deliver high flow and formidable pressure capabilities, meeting the demands of heavy-duty operations.
The long coupled centrifugal chemical process pump design is loaded with a multitude of advantages, making it an indispensable asset.
Experience the ease of maintenance with the long coupled configuration; it allows effortless access to the pump head without the hassle of detaching the motor.
Built to last, this process pump boasts a robust design tailored for continuous operation. With additional bearings positioned in the pump head, it significantly reduces motor strain during use, ensuring durability and reliability.
Thanks to the innovative back pull out design, the motor can be conveniently removed without disconnecting the pump from the pipework, translating to significant time savings during service and maintenance.
The centrifugal chemical process pump features independent shafts for the pump and motor, meaning only the pump shaft needs replacement if broken. Unlike other less resilient pumps using the motor shaft, risking entire motor replacement upon shaft failure.
The thoughtfully designed long coupled configuration results in a generous space between the pump and motor, safeguarding the motor from potential fluid ingress in case of seal failure.
Product Summary
• Versatile fluid handling: Capable of pumping a wide range of clean, low viscosity or slightly contaminated fluids with precision.
• Impeller Options: Available with either closed or semi-open impeller to suit diverse requirements.
• Maintenance Made Easy: The back pull out design ensures quick and hassle-free maintenance procedures.
• Thermal Resilience: Handles maximum fluid temperatures up to an impressive 175°C.
• Durable Shaft: Features a heavy-duty shaft engineered to avoid contact with the fluid, enhancing longevity.
• Enhanced Cooling: An external seal cooling system is available to optimize performance.
• Independent Shafts: Separate pump and motor shafts ensure easy replacement and maintenance.
• Material Flexibility: Available in a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Superior Flanges: Suction and discharge flanges comply with EN 1092-2 / PN 16 standards, with options for EN 1092-1 / PN 16 for steel and stainless steel casings.
• Seal Options: Choose from gland packing or single, double, and cartridge mechanical seal options for tailored solutions.
• Motor Variety: Available with three-phase 50Hz / 60Hz motors, with IP55 as the standard protection.
• ATEX Ready: ATEX certification is available upon request for specific environments.
• Certification On Demand: Independent certification is available to meet specific regulatory requirements.
• Compliance Excellence: Manufactured in strict accordance with EN 22858 / ISO 2858 standards.
• Low NPSH: Designed to operate efficiently with low Net Positive Suction Head requirements.
• Hassle-Free Assembly: Engineered for assembly without the necessity for alignment.
• Balanced Performance: All impellers balanced according to ISO 1940 class 6.3 for smooth operation.
• Stable Design: Long coupled with a sturdy baseplate to enhance operational stability.
• API Seal Compatibility: Design accommodates an API Seal according to API682 for enhanced safety.
• Superior Bearings: Equipped with oil-lubricated ball bearings for optimal performance 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 |
Renowned for our precision-engineered centrifugal pumps and chemical pumps, we equip our products with top-tier Famous brand Bearings. Our pumps promise remarkable longevity, even amidst the most challenging operational conditions.
To expertly manage axial thrust, our design includes wear rings situated at both the front and back of most impellers, complemented by a balance hole on the back shroud. For pumps experiencing minimal axial thrust, the design is streamlined by omitting the rear wear ring and balance hole, ensuring efficient performance without unnecessary components.
Our impellers boast high-precision casting, guaranteeing exceptional performance. Available in robust materials like cast iron, stainless steel, and bronze, they deliver durability and reliability.
Our innovative solutions are categorized into two primary groups:
1) "Flush" - This method injects clean, cool liquid directly into the seal chamber, enhancing the operational environment. An additional, smaller port, typically oriented downward, serves as a vent or leakage observation point, ensuring optimal performance and safety.
2) "Barrier or Buffer" for dual seals - In this configuration, a secondary fluid is introduced between two mechanical seals, preventing ambient air from interacting with the pumped fluid. This approach significantly boosts seal cooling and enhances operational safety by providing a protective barrier.
It's important to note that the majority of mechanical seals do not necessitate specialized external flush setups, making them versatile and efficient.
Flexible couplings
Flexible couplings offer unparalleled adaptability by accommodating movements like vibrations and thermal expansions without incurring damage. Ideal for scenarios with inevitable misalignments between drive and pump shafts, they effectively diminish excessive operational noise with their vibration absorption capabilities. While they feature a more sophisticated, costly design than rigid couplings, they offer significant long-term maintenance savings by safeguarding shafts and bearings against wear and damage.
Our Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings, exemplifying cutting-edge design and efficiency.
With superior balancing quality and reduced reaction loads, our couplings surpass normal options, boosting overall pump power transmission efficiency and 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
Our esteemed company has cultivated robust, long-term partnerships with several premier domestic pump-testing institutions, ensuring unparalleled quality and reliability in our offerings. These distinguished alliances include:
The National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang City,
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City,
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center situated in Chongqing City,
The Shanghai Mechanical and Electrical Products Quality Inspection Center, proudly based in Shanghai City, among others.
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