Model QD (G) pump is a horizontal multi-stage centrifugal pump and suitable for transporting pure water (with the contained foreign matters' content less than l % and graininess less than 0. 1mm) and other liquids of both physical and chemical natures similar to those of pure water.
QD (G) model middle and low pressure boiler water supply pump is applicable to transport medium with temperature of not higher than 120ºC, and is also applicable for small boiler water supply or transporting medium similar to hotwater.
QDG model hypo-high-pressure boiler water supply pump is applicable to transport medium with temperature of not higher than 180ºC, and is also applicable for small boiler water supply or transporting medium similar to hot water.
Performance range of mode QD (G) series
Flow: 3-684m3/h Corollary power: 4-3400kW
Head: 15.78-684m Inlet diameter: 25-450mm
For this series horizontal multistage centrifugal pump, both ends of it are supported, the casing portion is in a sectional form. it is connected to and actuated by a motor via a resilient clutch and the rotating direction of it. viewing from the actuating end. is clockwise. Refer to Fig. I for the structure of it.
Consists of suck-in section. middle-section, spitting section, guide vane, packing etc., which are linked together with a take-up bolt. with both suck-in and spitting mouths vertically upward.
Consists of a shaft, impeller, balancing disk, muff etc. Parts.
The whole rotor is supported by the roller bearings or
sliding bearings on both ends of the shaft and the bearings are lubricated with grease or 20# engin oil.
Cooling and seal of pump
The joint-part between suction section, intermediate
section and discharge section with be coated with molybdenum disulfide lubricating grease as seal. Rotor and fixed parts will be sealed by seal ring, guide-vane jacket and packing. The packing tensile degree of shaft seal should be proper and seep should be feasible dip by dip Unload run should be forbid. The seal ring and guide vane jacket should be replaced if they are too worn to be used any more and even do harm to pump work. There is spare shaft sleeve near shaft seal to protect shaft of pump.
|QD(G) Series multistage pump data|
Reliable and comprehensive quality assurance system ensures the excellent quality of our products. We have got the "International Standard" certification, manufactured according to GB, Department of superscript, and industry standards, we implement a comprehensive quality management during the entire process of production, accordance with the process file processing strictly, and a variety of detection methods etc.
We have meet the requirements of GB3216-89 national Class B accuracy, <>, computer test data monitoring of water test pumping station application. There are physical chemistry laboratory, metallographic analysis room in our factory, for testing material properties in different respects.
1. Quality Policy
Advocates quality is the life of enterprise, assiduous, the pursuit of excellence
2. Quality objectives
qualified products rate 99%, factory qualified pass rate: 100%
3. Quality Commitment
1) We will continue to improve the awareness of quality, implementing as GB/T19001-2000 quality assurance model standard, meeting technical requirements stipulated in the contract. We are not only discharge for the supplier host, but also for the quality of spare parts, external assistance products etc.
2) We promise the delivery time stipulated in the contract.
Shijiazhuang An Pump Machinery Co.,Ltd