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Service Support

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Why do pumps used for pumping sewage, seawater, and chemical wastewater experience particularly severe corrosion?

Many users are puzzled by this: Although the same pump can operate reliably for several years when used to pump clean water, as soon as it’s employed to transport sewage, seawater, or chemical wastewater, it quickly becomes riddled with rust, develops perforations and leaks, and may even become completely unusable.

2026-03-05

What are the common faults of multistage pumps used in mining?

Based on the instruction manual for multi-stage pumps used in mining and actual on-site operating conditions, the common faults mainly fall into the following categories—each of which frequently occurs at mining sites and can be directly addressed through troubleshooting guidance provided in the manual:

2026-02-28

What issues should be noted during the installation and maintenance of a double-suction, centerline-split pump?

In municipal water supply and drainage applications, double-suction split-case pumps typically operate continuously for 24 hours. The precision of installation directly affects the operational stability of the pump, while the timeliness of routine maintenance impacts both the service life of the equipment and the efficiency of water supply and drainage network operations. Based on the actual operating conditions of municipal engineering projects, we have systematically organized the key points for installation and subsequent maintenance into modular sections, ensuring practical applicability and alignment with the on-site operational requirements of water treatment plants, pressurized pumping stations, and drainage pumping stations.

2026-02-13

Features of SH-type split-case pumps

The SH-type split-case pump is a highly reliable and commonly used type in power plants. Its core features are particularly well-suited to the operational needs of power plants. Let’s take a closer look at its detailed design—each feature offers practical advantages: First, its structural design is exceptionally user-friendly and makes maintenance remarkably convenient. It adopts a horizontal, single-stage, double-suction configuration. Most importantly, the pump casing can be split horizontally right down the middle, and both the suction and discharge ports are located below the pump shaft’s centerline. During routine maintenance, there’s no need to disconnect the inlet and outlet pipelines or move the motor—simply open the pump cover to directly access and inspect internal components such as the impeller and bearings. This significantly reduces downtime for maintenance, making it especially ideal for power plant equipment that requires continuous operation and cannot afford prolonged shutdowns, thereby minimizing losses caused by unplanned outages.

2026-02-05

Corrosion-Resistant SH-Type Split-Casing Pump Selection Guide

Absolutely! In fact, many power plants—especially those handling media with slight corrosive properties—often find themselves torn when selecting pumps. That’s precisely where the corrosion-resistant SH-type split-case pump comes in as an exceptionally versatile choice. Below, we’ve put together a super practical selection guide to walk you through the process step by step, helping you make the right choice and avoid costly mistakes. The guide focuses on three key factors—operating conditions, materials, and parameters—making it easy even for beginners to get started:

2026-02-05

How do you select a double-suction, center-split pump for municipal water supply and drainage systems?

The core selection criteria for double-suction, mid-split pumps used in municipal water supply and drainage systems revolve around four key dimensions: water supply demand, operating conditions, installation environment, and compliance requirements. These criteria take into account high flow rates, low energy consumption, stability, and ease of subsequent maintenance. The selection process is clear and closely aligned with the actual application scenarios of municipal engineering projects. The specific selection procedure and key considerations are as follows:

2026-02-02

What makes high-temperature submersible pumps special?

The core feature of the high-temperature submersible pump is its ability to handle media at temperatures above 80°C—while conventional submersible pumps are designed only for use with normal-temperature clear water. To achieve this, key components such as materials, structure, sealing, and heat dissipation have been specifically upgraded. As a result, this pump can operate reliably and stably over extended periods in conditions involving hot water, high-temperature wastewater, and high-temperature chemical liquids. This is the most fundamental difference between it and ordinary submersible pumps—and also the very essence of its “special characteristics.”

2026-01-30

Precautions for Selecting Explosion-Proof Submersible Pumps for Mining Applications

An explosion-proof submersible pump for mineral processing is different from a regular submersible pump. Its core features—“explosion-proof, safe, and well-suited to mine conditions”—are crucial. Keep these key points in mind to avoid potential safety hazards later on and prevent disruptions to production. Let me explain it in simple, conversational terms—you’ll be able to put it directly into practice down in the mine!

2026-01-30

In which operating conditions are fire-fighting axial-flow pumps primarily used?

If you’re involved in firefighting or industrial infrastructure projects, you’re probably no stranger to fire-fighting axial-flow pumps. Unlike conventional fire pumps, these pumps aren’t so “particular” about their installation environment. Their key advantage lies in their ability to handle conditions such as **deep-water tanks, low liquid levels, and long-distance water supply**—and they offer stable operation and easy maintenance. The following scenarios are where they really shine. Let me break it down for you in simple, conversational terms:

2026-01-28

How do you choose a manufacturer of long-shaft seawater pumps?

If you’re involved in marine engineering, port and dock construction, seawater desalination, or marine equipment, when choosing a manufacturer of long-shaft seawater pumps, don’t just focus on the price quote! Seawater is highly saline and corrosive, with complex operating conditions. If you pick the wrong manufacturer, the pump body can easily corrode, leak, and frequently break down—actually slowing down your production. To ensure you make the right choice, pay close attention to these three key factors: **corrosion resistance, operational condition compatibility, and proven track record**. Here are five practical tips to help you select a reliable manufacturer—let’s break it down in simple, conversational language so you can put them straight to use!

2026-01-28

What are the daily maintenance methods for high-pressure stainless steel multistage pumps?

The core of daily maintenance for high-pressure stainless steel multistage pumps lies in corrosion prevention, blockage prevention, and wear prevention. Regular inspections and maintenance can extend the equipment’s service life and help avoid unexpected downtime due to failures. The specific methods are as follows:

2026-01-27

Multistage chemical pump

Method for selecting high-temperature, multi-stage chemical pumps: The core selection process should focus on three key factors—medium characteristics, temperature parameters, and operating condition requirements. Combined with the product design standards of Changsha Zhonglian Pump Industry, you can follow these steps to make an accurate selection:

2026-01-27

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Changsha Zhonglian Pump Industry Co., Ltd.
Changsha Zhonglian Pump Industry Co., Ltd.

Hotline:

+86 0731-88632200

Changsha Zhonglian Pump Industry Co., Ltd.

Export Trade/Technical Support:

+86 153-4831-2290

Changsha Zhonglian Pump Industry Co., Ltd.

Head Office Email:

zoomlian@yeah.net

Changsha Zhonglian Pump Industry Co., Ltd.

No. 210, Huanbao Zhong Road, Yuhua District, Changsha City, Hunan Province, Leowoju Wisdom Valley Building B, 8th Floor

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