Water supply and drainage equipment research and development, production and sales

DG type boiler water supply pump

Model DG pump is a horizontal multi-stage centrifugal pump and suitable for transporting clear water (with the contained foreign matters' content less than 1% and graininess less than 0.1mm) and other liquids of both physical and chemical natures similar to those of pure water.

DG model middle and low pressure boiler water supply pump is applicable to transport medium with temperature of not higher than 105℃, and is also applicable for small boiler water supply or transporting medium similar to hot water.

Head:

75~650m

Capacity:

0.3~280m³/h

Medium temperature:

≤105℃

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Product Information

For this series horizontal multi-stage 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. 1 for the structure of it.

Shaft seals are classified as packing seal and mechanical sea l.The water seal water of packing seal is industrial water, with pressure of 2 3kg/cm². The flushing water of mechanical seal is softened water, whose pressure shall be 3kg/cm² higher than the inlet pressure.

Detail description

Stator portion

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.

Rotor portion

Consists of a shaft, impeller, balancing disk, muff etc. parts.

Bearing portion

The whole rotor is supported by the roller bearings or sliding bearings on both ends of the shaft and the bearings are lubricate d with grease or 20# engine 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 sea l 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.

The shaft seal should perform to hold water and seal water

When temperature of the liquid transferred is above 80 , cooled water should be filled to the water cooling packing gland and shaft seal cooling chamber. Cooled water and seal water should be clean water in normal degree. The pressure of cooled water should be 1.5~3Kg/cm2, pressure of seal water should be more than 0.5 ~1 Kg/c m of the seal chamber. The positions of cooling water pipe joints are different for various kind of water pump.

Product Display

Model meaning

specifications

1	Column resilient clutch part	2	Shaft	3	Roller bearing part	4	Water cooled packing gland	5	Suck-in section
6	Seal ring	7	Middle section	8	Impeller	9	Guide vane	10	Guide vane sleeve
11	Take-up bolt	12	Spitting section	13	Balancing sleeve	14	Balancing disk	15	Packing
16	Cover of water cooling room	17	Bearing

1	Column resilient clutch part	2	Shaft	3	Bearingpart	4	Water cooled packing gland	5	Mechanica seal gland
6	Suck-in section	7	Stuffing	8	Mechanical seal	9	Seal ring	10	Middle section
11	Impeller	12	Guide vane sleeve	13	Spitting section	14	Guide vane	15	Balancing sleeve
16	Balancing ring	17	Balancing disk	18	Stuffing content	19	Bearingpart

1	Column resilient clutch part	2	Shaft	3	Bearing part	4	Stuffing gland	5	Suck-in section
6	Mechanical seal gland	7	Stuffing	8	Mechanicalseal	9	Middle section	10	Impeller
11	Seal ring	12	Guide vane sleeve	13	Spitting section	14	Guide vane	15	Balancing sleeve
16	Balancing ring	17	Balancing disk	18	(Front)Behind cover	19	Bearing part

size

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