The vertical long axis semi submersible multi suction head multi-stage sump sewage pump is a special vertical centrifugal pump that is pressurized step by step through multiple impellers connected in series. The pump body is completely submerged below the liquid level, and the motor is arranged above the liquid level. The core advantage of the vertical long axis semi submersible multi suction head multi-stage sump sewage pump is that a single pump can achieve ultra-high head output, and the entire process can start automatically without pre filling water. The multi-stage semi submersible pump is the main equipment for high head deep liquid level transportation scenarios.
🔧  Core structural characteristics
Multi stage series boosting structure: The motor drives the pump shaft to drive multiple impellers to rotate synchronously. The liquid passes through each stage of the impeller in sequence to complete the "impeller pressurization guide vane stabilization" process. The pressure increases once after each stage, ultimately achieving ultra-high head output. The head height is directly determined by the number of impeller stages.
Segmented long axis design: The insertion depth can reach up to 10 meters, and a multi-point support structure is used to ensure smooth operation. The shaft system can be adjusted axially, suitable for deep installation scenarios of various deep water tanks and underground storage tanks.
Fully submerged overcurrent components: Core working components such as impellers and guide vanes are completely submerged below the liquid level, and there is no need to inject water or evacuate them during startup. They can be pressurized and supplied with water synchronously upon startup, completely eliminating the risk of cavitation.
Axial force balancing system: The rotor components consist of a pump shaft, impeller, balance plate, and shaft sleeve. The balance plate completely counteracts the huge axial force generated by the multi-stage impeller, greatly reducing bearing load and extending equipment life.
Sealing system optimization: A packing box is used to seal the gap between the pump casing and the pump shaft, maintaining the vacuum inside the pump. Some high-risk operating condition models have been upgraded to containerized mechanical seals to fundamentally eliminate the risk of medium leakage.
Modular combination design: The pump body is composed of an inlet section, an outlet section, and a middle section combined through a pull rod. Each middle section is equipped with an impeller, and the number of impeller stages can be flexibly adjusted by increasing or decreasing the number of middle sections, and the head parameters can be changed as needed.
📊  Typical performance parameters
parameter item
Industry wide scope
Rated flow rate 2~1500 m ³/h
The total head is 19-400 meters, which is 3-10 times that of a regular single-stage submersible pump
The standard model for underwater depth supports 3-10m, while the customized version with extra length can be extended to over 15m
The conventional medium temperature range is -20~150 ℃, while the customized high-temperature range with cooling structure can reach up to 350 ℃
Under normal operating conditions, the operating efficiency can reach 75%~88%, and the high-efficiency zone covers 70%~120% of the rated flow rate
Allow solid particle size wear-resistant machines to handle particles with a diameter ≤ 5mm
The design standards comply with ISO2858 and ISO5199 international standards, and some models meet API industrial pump specifications
🏭  Main application scenarios
Mining deep well drainage: Transporting mineral water containing solid particles, a single pump can directly transport hundreds of meters of mine water to the ground without the need for multiple pumps to relay and pressurize, suitable for high head and deep mining drainage scenarios.
Petrochemical industry: transporting crude oil, oil-water mixtures, and various corrosive acid-base solutions to meet the high head deep pool liquid extraction needs of oil extraction plants, chemical plants, and refineries.
High rise and industrial water supply: secondary water supply for high-rise buildings, boiler water supply, long-distance high lift water supply, a single pump can complete vertical transportation of hundreds of meters high, greatly simplifying the structure of the water supply system.
Water treatment and environmental engineering: urban sewage treatment plant discharge system, basement drainage station, municipal engineering slurry discharge, suitable for high lift sewage lifting scenarios.
Agricultural deep well irrigation: Extracting groundwater from bedrock deep wells several hundred meters deep and directly transporting it to sprinkler irrigation networks without the need for secondary pressurization, suitable for high lift water-saving irrigation scenarios in contiguous fields.
✨  Core operational advantages
Ultra high head output capability: The multi-stage impeller series structure can easily achieve a head of hundreds of meters or even thousands of kilometers. A single pump can complete deep liquid level high head transportation without the need to configure multiple pumps to relay pressure, greatly reducing system complexity.
Extremely reliable start-up: The impeller is always completely submerged below the liquid level, achieving self filling water supply throughout the entire process. Water can be discharged immediately upon start-up, completely eliminating the risk of start-up failure caused by suction and cavitation in ordinary high head centrifugal pumps.
Low land occupation and infrastructure costs: The vertical structure is directly installed on the top of the water tank and tank body, requiring only a small amount of foundation installation and no additional large space pump room. The infrastructure investment is reduced by more than 40% compared to horizontal multi-stage pumps with the same parameters.
Strong adaptability to working conditions: materials can be flexibly customized according to the characteristics of the medium. Cast iron is used for ordinary clean water, 304/316L stainless steel/duplex steel is used for highly corrosive media, and high chromium alloy wear-resistant materials are used for granular media, covering the transportation needs of all scenarios.
Convenient and safe maintenance: The motor is located on the ground, and daily inspections and maintenance do not require going underground. The modular structure does not require dismantling external pipelines, and internal components can be directly extracted for maintenance, greatly reducing downtime and maintenance time.
Stable operation and long service life: The radial runout of the shaft system is controlled within 0.05mm, with low operating noise and minimal vibration. The mean time between failures (MTBF) can exceed 20000 hours, and stable performance can be maintained even after long-term 24-hour continuous operation.
Key operating taboos: It is strictly prohibited to operate the vertical long shaft semi submersible multi suction head multi-stage sump sewage pump dry. A low water level automatic pump stop protection device must be installed to avoid bearing dry wear and burning caused by low water level; When installing the long shaft, it is necessary to ensure that the overall verticality deviation is ≤ 0.1mm/m, otherwise it will aggravate bearing wear and even cause the transmission shaft of the vertical long shaft semi submersible multi-stage suction head sewage pump to bend and break.