PRODUCTS
D-type Horizontal Mult-stage Centrifugal Pump
The D-type Horizontal Multistage Centrifugal Pump is a high-efficiency and energy-saving upgraded product developed by our company based on three-dimensional turbulence theory, utilizing CAD and CFD software for design. It has given rise to the DG, MD, DF, D/S, D/G, and D/P series of pumps based on the input medium and temperature, making it particularly suitable for applications such as mine drainage, long-distance water transport, and seawater desalination.” This version maintains the original meaning while incorporating the specified keywords in a way that flows naturally with the existing content. The High-Efficiency Centrifugal Pump concept is already present in the first sentence, and the other terms are added as specific application areas.
Performance range
Flow rate 6.3-1450 m³/h
Head 17-1990 m
Main Applications
D-type pumps are designed for conveying clean water or other liquids with physical and chemical properties similar to water. The medium temperature should not exceed 80°C. They are suitable for mine drainage, industrial and urban water supply, and long-distance water transportation.
DG-type pumps are used for conveying clean water or other liquids with properties similar to water. The medium temperature should not exceed 105°C, making them ideal for small boiler feedwater or transporting hot water and similar media. They can also be customized for applications with medium temperatures not exceeding 150°C upon request.
MD-type single-stage multi-stage wear-resistant pumps are an improved version of the D-type pump, featuring high efficiency, energy savings, excellent wear resistance, and a long service life. They are particularly suitable for mine drainage, conveying mine water with a solid particle content of no more than 1.5% (particle size < 0.5 mm) and other similar liquids, with liquid temperatures not exceeding 80°C.
DF-type single-stage multi-stage corrosion-resistant pumps are designed for conveying corrosive liquids without solid particles, with temperatures ranging from -20°C to 105°C. They are primarily used in industries such as chemical, petroleum, metallurgy, light industry, printing and dyeing, pharmaceuticals, environmental protection, seawater desalination, offshore oil production, and mining.
Structural Description
Fixed Part of the Pump: The fixed part mainly consists of the inlet section, middle section, outlet section, guide vanes, bearing housing, etc., forming the working and supporting structure of the pump. The suction inlet is oriented horizontally, while the discharge outlet points vertically upward.
Rotating Part of the Pump: The rotating part primarily includes the shaft, several impellers mounted on the shaft, a balance disc used to counteract axial thrust, a coupling , and bearings. The entire rotating assembly is directly connected to the motor via the coupling. The bearings are lubricated with grease or thin oil.
Sealing of the Pump: The stationary joint surfaces between the inlet section, middle section, and outlet section are sealed with paper gaskets or sealant. The sealing between the fixed and rotating parts at each stage is achieved through small clearances between the sealing ring , the guide vane sleeve, and the impeller. During maintenance, if excessive clearance is found, the relevant parts should be replaced. To prevent water from entering the bearings, O-ring oil-resistant rubber seals and water rings are used. The packing serves as a seal to prevent air ingress and excessive liquid leakage. The tightness of the packing must be appropriate: if too tight, the shaft sleeve may overheat and consume more power; if too loose, excessive liquid leakage will reduce pump efficiency. The tightness of the packing is adjusted using the packing gland.
Rotation Direction of the Pump: When viewed from the motor side, the pump rotates in a clockwise direction.
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