Experience unmatched efficiency and versatility with the SLZ end suction pump by Shanghai Semhai Pump Co., Ltd. This long-coupled, single-stage centrifugal chemical process marvel meets the EN 22858 / ISO 2858 standards, ready to excel across diverse industrial and marine settings. It's adept at handling low viscosity clean or slightly contaminated fluids, devoid of solid or fibrous particulates. Seamlessly transfer fresh water, sea water, and a variety of fuels like diesel, petrol, and kerosene. Its application spectrum spans fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
Discover the prowess of our robust, large-scale centrifugal chemical process pump, engineered for heavy duty tasks. Delivering high flow and high pressure, it's tailored to tackle the most demanding challenges.
The ingeniously designed long coupled centrifugal chemical process pump offers numerous advantages that elevate its performance to new heights.
With its long coupled configuration, maintenance becomes effortlessly straightforward, allowing for easy access to the pump head without disassembling the motor.
Built for durability, this process pump is designed to withstand continuous use, with additional bearings in the pump head relieving the motor of excessive strain during operation.
Thanks to its back pull out design, the motor can be detached without disconnecting the pump from the pipework, facilitating time-efficient servicing and maintenance.
Our centrifugal chemical process pump boasts independent shafts for the pump and motor. This innovation ensures that in the event of a pump shaft breakage, only the shaft needs replacement, unlike less robust models where motor shaft failure necessitates entire motor replacement.
The long coupled design introduces a generous gap between the pump and motor, effectively safeguarding the motor from fluid ingress in the unlikely event of a seal breach.
Product Summary
• Capable of handling a vast array of clean low viscosity or mildly contaminated fluids with precision.
• Available with either a closed or semi-open impeller to suit diverse needs.
• Features a back pull out design, ensuring maintenance is quick and straightforward.
• Handles fluids up to a maximum temperature of 175°C, demonstrating exceptional heat resistance.
• A durable, heavy-duty shaft that remains untouched by the fluid ensures longevity and reliability.
• Options for an external seal cooling system enhance operational efficiency.
• Independent shafts for the pump and motor enhance ease of maintenance and durability.
• Available in durable materials such as cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request, providing tailored solutions.
• Suction and discharge flanges align with EN 1092-2 / PN 16, with steel and stainless steel casings conforming to EN 1092-1 / PN 16.
• Choose from gland packing, single, double, or cartridge mechanical seal options to meet your specific needs.
• Equipped with three-phase 50Hz / 60Hz motors, with IP55 protection as a standard feature.
• ATEX-compliant versions available upon request, ensuring safety in hazardous environments.
• Independent certification available upon request, ensuring trust and reliability.
• Manufactured to the highest standards, adhering to EN 22858 / ISO 2858.
• Low NPSH characteristic ensures optimal performance under varying conditions.
• Designed for assembly without alignment, simplifying installation and setup.
• All impellers are precision balanced to ISO 1940 class 6.3, guaranteeing smooth and efficient operation.
• Long coupled with a baseplate for stable, robust operation.
• Optional API Seal installation available, adhering to API682 standards.
• Oil-lubricated ball bearings enhance 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 their excellence, our centrifugal and chemical pumps integrate famous brand bearings, ensuring remarkable durability even amidst the most challenging conditions. Experience prolonged service life with pumps that stand strong against adversity.
Our design meticulously balances axial thrust, featuring wear rings positioned at the front and rear of most impellers, complemented by a balance hole on the back shroud. For certain pumps with minimal axial thrust, the need for rear wear rings and balance holes is elegantly eliminated.
Crafted with meticulous precision, our casting impellers promise unmatched performance. Available in robust materials such as cast iron, stainless steel, and bronze, they exemplify reliability and excellence.
Our designs are categorized into two primary groups:
1) "Flush" - This method involves injecting a clean, cool liquid into the seal chamber, optimizing the operating environment. A second, strategically placed smaller port allows for leakage observation or venting, enhancing operational safety.
2) "Barrier or Buffer" for dual seals - Aids in maintaining a secondary fluid between two mechanical seals, effectively preventing ambient air intrusion, boosting cooling, and enhancing safety.
Notably, many mechanical seals operate efficiently without the need for special external flush arrangements, streamlining maintenance.
Flexible Couplings
Flexible couplings shine where flexibility is crucial, accommodating vibrations and thermal expansions seamlessly, unlike their rigid counterparts. Ideal for slight misalignments, they absorb vibrations to minimize noise. While their design is complex and costlier, they safeguard shafts and bearings, ensuring maintenance savings over time.
Our Semhai API standard chemical pumps embody API 671 Standard Disc Couplings, setting the benchmark in coupling technology.
With superior balancing quality and reduced reaction loads, these couplings surpass standard ones, boosting the entire pump's power transmission efficiency and effectiveness.
| 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. boasts a robust network of professional alliances, having forged enduring partnerships with a number of prominent national pump-testing authorities, ensuring unparalleled standards of excellence.
Among these esteemed collaborations is the National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang City, a beacon of quality assurance in industrial pump testing.
Further enhancing our credentials, we collaborate with the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, renowned for its meticulous quality assessments.
Our esteemed partners also include the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, a pivotal institution in agricultural pump quality validation.
Additionally, the Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City stands as a testament to our commitment to maintaining the highest quality standards in mechanical and electrical product testing, among other distinguished institutions.
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