ZS Series Stainless Steel End-Suction Pump — Compact Corrosion-Resistant Design for Industrial Liquid Transfer
When an industrial facility needs a pump that handles clean water and mildly corrosive liquids reliably while taking up minimal floor space, the ZS Series Stainless Steel Horizontal End-Suction Centrifugal Pump from Chaodun Pump delivers a focused solution. Built using stainless steel stamping, bulging, and welding processes, this pump combines compact size with corrosion resistance and quiet operation across a wide range of industrial applications.
Stainless Steel Construction — Built for Corrosive Environments
The ZS series is constructed entirely from stainless steel using a stamping, bulging, and welding manufacturing process. Unlike cast iron or bronze pumps that corrode over time when exposed to mildly acidic or alkaline liquids, the stainless steel body resists chemical attack and maintains structural integrity across its service life. This makes the ZS series suitable for applications in water treatment, chemical processing, HVAC systems, and food-grade liquid transfer where material compatibility matters.
The stainless steel construction also means the pump can handle liquids with a pH range of 2 to 12 and temperatures between -20°C and +100°C. Whether pumping weak acids, alkalis, condensate, or treated water, the pump body does not degrade, flake, or introduce contamination into the fluid stream. For facilities that process varying liquid types on the same line, the ZS pump’s broad chemical compatibility eliminates the need to swap pumps when the medium changes.
Compact Horizontal End-Suction Design
The ZS pump features a horizontal end-suction configuration where the suction inlet is positioned on the horizontal axis and the discharge outlet points vertically upward. This layout simplifies piping connections and allows the pump to be installed directly in-line with the suction pipeline. The suction and discharge port diameters are matched to the pump model — for example, the ZS 65-50-200 has a 65 mm suction inlet, 50 mm discharge outlet, and a 200 mm nominal impeller diameter — making it easy to select the right size for your system’s flow and pressure requirements.
The compact footprint is one of the ZS series’ defining characteristics. Because the pump, shaft, and standard motor are directly coupled in a single unit, there is no need for separate base frames, alignment procedures, or coupling guards. The entire assembly mounts on a single foundation, reducing installation space and simplifying maintenance access. For facilities with limited pump room space — such as retrofit installations, vessel engine rooms, or modular water treatment skids — the ZS pump’s small size is a practical advantage.
Wide Application Range Across Industries
The ZS series serves as a versatile workhorse across multiple industries:
| Industry | Application |
|---|---|
| Municipal Water Supply | Water plant filtration, distribution network pressure boosting, zone delivery |
| Industrial Processing | Process water systems, cleaning systems, boiler feed water, condensate return |
| HVAC & Cooling | Cooling water circulation, air conditioning systems, chilled water transfer |
| Water Treatment | Distillation systems, separators, swimming pool filtration and circulation |
| Agriculture & Healthcare | Farmland irrigation, medical and pharmaceutical liquid transfer |
| Machine Tool Support | Coolant supply, cutting fluid circulation for CNC and machining centers |
Motor and Electrical Specifications
The ZS pump is equipped with a fully enclosed, air-cooled, two-pole standard motor rated at IP55 protection and Class F insulation. This motor configuration provides reliable operation in industrial environments where dust, moisture, and temperature variations are present. The standard voltage options include single-phase 220V at 50Hz and three-phase 380V at 50Hz, with the motor power matched to the pump’s hydraulic performance for each model.
The IP55 rating ensures that dust ingress is sufficiently prevented to not interfere with operation, and water jets from any direction will not cause harmful effects. The Class F insulation allows the motor winding to withstand operating temperatures up to 155°C, providing a thermal safety margin even under sustained high-load conditions.
Installation and Operating Conditions
The ZS pump should be installed in a ventilated location protected from freezing. The pump must be mounted horizontally with the suction inlet facing horizontally and the discharge outlet oriented vertically. Adequate clearance must be provided around the unit for inspection and maintenance access. For outdoor installations, an appropriate enclosure must be fitted to protect electrical components from water ingress and condensation.
The pump handles clean, thin, non-flammable, and non-explosive liquids that do not contain solid particles or fibers. The maximum system operating pressure is 10 bar, and the maximum ambient temperature is 40°C at altitudes up to 1000 meters. The installation must ensure that the pump is not subjected to piping tension — flexible rubber joints are recommended at both suction and discharge connections, and independent pipe supports should be provided.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Series | ZS Series Stainless Steel Horizontal End-Suction Pump |
| Construction Material | Stainless steel (stamping, bulging, welding process) |
| Example Model | ZS 65-50-200/11.0 (65mm suction, 50mm discharge, 200mm impeller, 11kW motor) |
| Motor Type | Fully enclosed, air-cooled, two-pole standard motor |
| Protection Rating | IP55 |
| Insulation Class | Class F (up to 155°C) |
| Standard Voltage | 50Hz, 1×220V / 3×380V |
| Liquid Temperature Range | -20°C to +100°C |
| Maximum System Pressure | 10 bar |
| Maximum Ambient Temperature | +40°C |
| Maximum Altitude | 1000 m |
Why Choose the ZS Series from Chaodun Pump
Chaodun Pump manufactures the ZS series using precision stainless steel forming techniques that produce a pump with consistent dimensions, smooth internal surfaces, and reliable hydraulic performance. The direct-coupled motor-pump design eliminates alignment issues and reduces vibration compared to belt-driven configurations. Combined with competitive pricing, standard motor compatibility, and straightforward maintenance procedures, the ZS series offers a cost-effective solution for facilities that need a durable, corrosion-resistant pump for clean and mildly corrosive liquid transfer applications.
Frequently Asked Questions
Q: What liquids can the ZS series pump handle?
The ZS series is designed for clean, thin, non-flammable, and non-explosive liquids without solid particles or fibers. It handles water, weak acids, weak alkalis, condensate, and other chemically similar liquids with a pH range of 2 to 12 and temperatures from -20°C to +100°C.
Q: What is the maximum system pressure?
The maximum system operating pressure is 10 bar. This covers most industrial water supply, HVAC, and liquid transfer applications.
Q: Can the ZS pump be installed outdoors?
Yes, but an appropriate protective enclosure must be installed to prevent water ingress and condensation from affecting the electrical components. The pump body itself is stainless steel and weather-resistant, but the motor and electrical connections require protection.
Q: What maintenance does the ZS series require?
Routine maintenance includes periodic inspection of mechanical seals, bearing lubrication checks, and verification that the motor current remains within rated limits. The stainless steel construction minimizes corrosion-related maintenance compared to cast iron pumps.
Q: How does the ZS series differ from the ISW horizontal centrifugal pump?
The ZS series is constructed from stainless steel using stamping and welding processes, making it suitable for corrosive and food-grade applications. The ISW series typically uses cast iron construction and is optimized for higher-flow clean water applications where corrosion resistance is less critical.