Application
Series EZG(S) is widely used for handling the mixture of abrasive and corrosive slurries for high head in power plant, metallurgy, coal mining, building materials and chemical industrial departments.
Design
1.This series of slurry pump is designed as horizontal, single-stage, single-suction, cantilevered, double-casing centrifugal pumps; Reliability design ensures long MTBF (mean time between events)
2.Broad passage, good anti-clogging performance, excellent performance of NPSH
3.The metric bearing with oil lubrication, setting lubricating and cooling systems reasonably ensure the bearing operate under the low temperature;
Material advantage
The main wear parts of slurry pump are wet parts. Excellence Pump Industry Co., Ltd uses many kinds anti-abrasive to extend the lifetime of wet parts.
The wet parts material in standard EZG series pump is high chrome alloy KmTBCr26, which is a kind of wear resistant white iron that offers excellent performance under erosive conditions. In order to meet different requirements, Excellence Pump Industry Co., Ltd is always making the continuous optimization of material to replace high chrome alloy and nature rubber, such as EPDM, Hapalon, Hastealloy, CD4MCU, chloroprene rubber adhesive and other anti-abrasive material.
The casing adopts double-casing structure, which makes the wet parts easy to be replaced. According to the pressure requirements, the outer casing uses ductile cast iron or grey cast iron, and the wet parts adopts the high-chrome alloy or cast steel.
Shaft Seal
Series EZG(S) pumps can adopt centrifugal seal with packing seal, packing seal and mechanical seal. They have been well adopted to prevent the slurry from leakage.
(1)Centrifugal seal with packing seal:
Centrifugal seal make use of the pressure from impeller and expeller running in series and the packing or lip seal to prevent the leakage when the pump stops running. When the pressure at the suction is less than 10% of the pressure at the discharge side for single stage pump or the first stage of the pump in series, this kind of seal can be adopted. It can run without flush water, and has the advantages of not diluting the slurry and good sealing effect etc. It will increase the power consumption (usually increase 5% of the shaft power).
(2) Packing seal
Packing seal is a common seal type and can be used in various work conditions. The packing materials use the PTFE, the asbestos or other special materials, which can be used under corrosive and high temperature conditions. It has advantages of simple structure and easy maintenance.
(3) Mechanical Seal:
It adopts the international leading seal technology to achieve good sealing effect. Cartridge structure makes it easy to install and replace, and different structures are suitable different work conditions. The material of faces adopts high-hardness ceramics and alloy material. The design and the match of mechanical seal and seal box conform to the medium flow conditions, so the seal is with higher performances of anti-abrasive and anti-vibration. This can satisfy the clients’ requirements under various hard work conditions.
Ralated Article: Beijing wastewater utility selects Flygt pumps
Xylem Inc has secured a US$2.9 million contract from the Beijing Drainage Group (BDG) to install Flygt pumps in 19 pumping stations in downtown Beijing, China.
The new Flygt submersible centrifugal sewage pumps will improve the stations’ water storage capability and prevent overflow.
“We are proud to have been chosen to be part of this meaningful project with the BDG,” said Shuping Lu, vice president and country director for Xylem China.
BDG is a wholly state-owned wastewater utility established with the approval of the Beijing Municipal Government.
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