Pump Model: CNSME 150ZJ-A60　　
ZJ --- High Head / High Pressure Slurry Pumps 
150 --- Discharge Diameter 　　
A60 --- 5-Vane Closed Impeller with Diameter of 600mm

In the classification of pumps, according to their slurry delivery conditions, we refer to pumps suitable for transporting liquids (mediums) containing suspended solids as slurry pumps. At present, the slurry pump is one of the indispensable equipment in various technological processes such as ore beneficiation, coal preparation, desulfurization, and filter press feeding. As people pay more attention to environmental protection, the sealing of slurry pumps is also being paid more and more attention.
There are three main types of shaft seals for slurry pumps: packing seal, expeller seal, and mechanical seal. These three types of shaft seals have their own advantages, which are introduced as follows:
Packing Seal:
The packing seal of the slurry pump relies on the soft and hard running-in between the packing and the shaft sleeve to achieve the sealing effect. The packing seal needs to add shaft seal water, the pressure of which must exceed the slurry pump discharge pressure. This sealing method is easy for Replacement and is widely used in ore dressing plants and coal washing plants.
Expeller Seal:
The expeller seal of the slurry pump relies on the pressure generated by the expeller to achieve the sealing effect. This sealing method is employed when the user is short of water resources.
Mechanical Seal:
The mechanical seal relies on the close contact between the rotary ring and the static ring in the axial direction to achieve the sealing purpose. The mechanical seal can prevent water from leaking and is especially popular in major domestic concentrators and power plants. However, it is necessary to protect the friction surface to avoid abrasion during installation. Mechanical seals are generally divided into single mechanical seals and double mechanical seals.


At this stage, we recommend the single mechanical seal with flushing water inmineral separation plants. This type of mechanical seal has been widely used. Although mechanical seals without flushing water are also recommended by mechanical seal manufacturers, they are not ideal in field applications.
In addition to the above three commonly used shaft seals, there is also a shaft seal, which is called "L"-shaped shaft seal in this industry. This kind of shaft seal is generally used in large or huge slurry pumps, but is rarely used in small and medium-sized slurry pumps.
Therefore, in the selection of the slurry pumps, not only the pump performance specifications must be considered, but the selection of the shaft seal is also very critical. Selecting the suitable shaft seal for slurry pumps, based on the characteristics of the transported medium at site and the working conditions, will extend the reliable operation time of the pump and reduce the down time caused by the replacement of shaft seal. In this way, not only the total ownership cost is very much reduced, but also the working efficiency is greatly improved.

The heavy duty SH(R) pump range is designed to perform continuous pumping of highly abrasive slurries. This range of pumps have been proved successful in processes from hydrocyclone feed to regrind, flotation and tailings in minerals processing plants as well as other industrial applications

If you have any questions about heavy-duty slurry pumps, you can contact us!

Horizontal slurry pump mainly includes the following series ‌ :

‌AH(R) type, L(R) type, HH type, M(R) type ‌ : These series belong to the county arm type double pump shell slurry pump, in which the finger with the letter R is lined with rubber material. Their flow parts can be made of high chromium alloy or wear resistant rubber.

‌ZJ series ‌ : This series is also a double pump housing structure, different from the AH series, it uses a central open bearing assembly. ZJ series is characterized by cutting the impeller to meet the needs of the lift, the same type of pump can have multiple sizes of the impeller, with the increase of the impeller, the lift will also increase.

ZGB series ‌ : This series of slurry pump is also double shell structure, but the flow parts do not have rubber material. It is characterized by large flow, high head, and can be multistage series.

‌G/GH series ‌ : called sand and gravel pump, is a single pump shell structure. It has wide flow channel and good cavitation performance, and is usually used in sand pumping and other working conditions.

‌DT series ‌ : called desulfurization pump, also single pump shell structure. It is mainly used for desulfurization projects, and the flow parts are generally made of A49 material, which has good corrosion resistance.

These range from county arm twin housing to single housing construction, from high wear materials to application-specific desulfurization pumps to meet the diverse needs of a wide range of industrial processes ‌

Reason I: Impeller unbalanced

Wear and clogging of the impeller will cause the uneven distribution of the impeller mass and then lead to vibration. Impellers should be checked and maintained at a regular time basis.

Reason II: Unreasonable assembly of bearings

Re-assemble the bearings onto the shaft, or change the bearings.

Reason III: Inadequate lubricants for the bearings

Too much or too little of the grease or oil or contaminated grease or oil will cause the short life of the bearings. Take out the bearings and use them again only after cleaned up.

Reason IV: Asymmetry or non-parallel of the motor shaft and the pump shaft

Adjust the motor shaft or the pump shaft, replace with a new shaft if the current one is deformed or bent.

Reason V: Uneven feeding of materials

Uneven feeding of materials or big solids entering will cause unstable flow inside the pump chamber, keep an even slurry feeding and protect large solids from entering into the pump.

Reason VI: Cavitation

Too low pressure inside the pump will generate bubbles and when the bubbles break, there will be vibration and noise. Raise the pump suction liquid level to increase static head.

Reason VII: Loose of the foundation or spare parts or incorrect installation

Loosened foundation or internal or external pump parts will cause vibration during pump operation. Check and maintain the slurry pump regularly.