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DFW100-160(I) DFW125-125(I) DFG50-160/2/3 DFG100-200/2/22 mechanical seal


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DFW100-160(I) DFW125-125(I) DFG50-160/2/3 DFG100-200/2/22 mechanical seal

Pin     brand: Chuan Mi seal Scope of application: chemical pumps, clean water pumps, sewage pumps, waste water pumps, oil pumps Applicable industries: steelmaking, papermaking, chemical, electric power, cement industries, etc. Applicable host: Shanghai Dongfang Pump Industry
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Mechanical seal for water pump
product description


Structural features:

1. Single end face, rubber bellows compensation, strong anti-blocking ability. When in use, regardless of the spring rotation direction.

2. The auxiliary sealing ring is nitrile rubber, fluorine rubber, ethylene propylene rubber, silicon rubber.

3. It complies with ISO3069, DIN24960 and GB6556 standards and has strong versatility.

Applicable medium:

Oil, water, acid, alkali, salt and other clean water and waste water, sewage, and dirty oil containing particles.

Working parameters:

Fixed content: ≤10%

Temperature: ≤180℃

Pressure: ≤1.5MPa

Shaft diameter: ≤100mm

Material parameters:

Body material: 304, 316L or 2205, 2507, 1.4529

Seal ring material: graphite, silicon carbide, tungsten carbide

main application:

This type of mechanical seal is mainly used for various water pumps, chemical pumps, sewage pumps, waste water pumps, and slop oil pumps.

Common models:

DFW40-125(I)     DFW40-125A      DFW40-160(I)

DFW40-160A      DFW40-160B      DFW40-200(I)

DFW40-200A      DFW40-200B      DFW40-250(I)

DFW40-250A      DFW40-250B      DFW50-100(I)

DFW50-100(I)A    DFW50-125(I)     DFW50-125(I)A

DFW50-160(I)    DFW50-160A      DFW50-160B

DFW50-200(I)    DFW50-200A       DFW50-200B

DFW50-250(I)    DFW50-250A       DFW50-250B

DFW50-250C     DFW65-100(I)      DFW65-100A

DFW65-125(I)    DFW65-125A       DFW65-160(I)

DFW65-160A     DFW65-160B       DFW65-200(I)

DFW65-200A     DFW65-200B       DFW65-250(I)

DFW65-250A     DFW65-250B       DFW65-250C

DFW65-315(I)    DFW65-315A      DFW65-315B

DFW65-315C     DFW80-100(I)      DFW80-100A

DFW80-125(I)    DFW80-125A      DFW80-160(I)

DFW80-160A     DFW80-160B       DFW80-200(I)

DFW80-200A     DFW80-200B       DFW80-250(I)

DFW80-250A    DFW80-250B        DFW80-315(I)

DFW80-315A     DFW80-315B       DFW80-315C

DFW100-100(I)   DFW100-100A      DFW100-125(I)

DFW100-125A    DFW100-160(I)     DFW100-160A

DFW100-160B    DFW100-200(I)     DFW100-200A

DFW100-200B    DFW100-250(I)     DFW100-250A

DFW100-250B    DFW100-315(I)     DFW100-315A

DFW100-315B    DFW100-315C      DFW125-125(I)

DFW125-125A    DFW125-160(I)     DFW125-160A

DFW125-160B    DFW125-200(I)     DFW125-200A

DFW125-200B    DFW125-250(I)    DFW125-250A

DFW125-250B    DFW125-315(I)    DFW125-315A

DFW125-315B    DFW125-315C      DFW150-125(I)

DFW150-125(I)A  DFW150-160(I)     DFW150-160(I)A

DFW150-160(I)B  DFW150-200(I)     DFW150-250(I)

DFW150-315(I)   DFW150-200(I)     DFW150-400

DFW150-500     DFW200-200(I)      DFW200-250(I)

DFW200-315(I)   DFW200-400(I)A     DFW200-400(I)B

DFW200-500(I)A  DFW250-250        DFW250-315

DFW250-315A    DFW250-315B       DFW250-400(I)

DFW300-250     DFW300-315       DFW300-400A

DFG25-100/2/0.37         DFG50-160/2/3

DFG80-315/2/37          DFG150-160/2/22

DFG65-315/4/5.5          DFG25-125/2/0.75

DFG50-200/2/5.5          DFG100-125/2/11

DFG150-250/2/55          DFG80-200/4/3

DFG25-160/2/1.1          DFG50-250/2/11

DFG100-160/2/15          DFG40-200/4/0.75

DFG80-250/4/5.5          DFG32-100/2/0.55

DFG65-100/2/1.5          DFG100-200/2/22

DFG40-250/4/1.5          DFG80-400/4/15

DFG32-125/2/0.75          DFG65-160/2/4

DFG100-250/2/37          DFG40-315/4/3

DFG80-500/4/30           DFG32-200/2/3

DFG65-250/2/15           DFG100-315/2/75

DFG50-200/4/1.1          DFG100-315/4/15

DFG40-100/2/0.55         DFG65-315/2/30

DFG125-160/2/22          DFG50-315/4/4

DFG100-500/4/45          DFG40-160/2/2.2

DFG80-160/2/7.5          DFG125-200/2/37

DFG50-400/4/7.5          DFG125-315/4/22

DFG40-200/2/4            DFG80-200/2/15

DFG125-250/2/55           DFG65-200/4/1.5

DFG125-500/4/75           DFG50-100/2/1.1

DFG80-250/2/22            DFG150-125/2/15

DFG65-250/4/3            DFG80-250/2/22


Note: Because the pump has many uses, the sealing material (friction pair) is also different, in order to ensure the reliability of the seal

The manufacturer recommends as follows:

1. Clean water (working condition without particulate matter)-select the friction pair of moving ring (alloy), select the friction pair of static ring (graphite)

2. Strong corrosion (conditions containing particulate matter)-selection of moving ring friction pair (silicon carbide), static ring friction pair selection (silicon carbide)

3. Working conditions that contain particles and have large vibrations-use of moving ring friction pair (alloy), static ring friction pair (alloy)

4. It can also be customized according to customer requirements. If there is no requirement, the default is (clear water)

Installation and use requirements:

1. The radial runout of the shaft of the equipment should not be greater than 0.04 mm, and the axial runout is not allowed to be greater than 0.1 mm;

2. The sealing cavity of the equipment should be kept clean during installation, the sealing parts should be cleaned, and the sealing end face should be intact to prevent impurities and dust from being brought into the sealing part;

3. It is strictly forbidden to knock or knock during the installation process, so as not to damage the mechanical seal due to friction and seal failure;

4. During installation, the surface in contact with the seal should be coated with a layer of clean mechanical oil for smooth installation;

5. When installing the static ring gland, the tightening screws must be evenly stressed to ensure that the end face of the static ring is perpendicular to the axis line;

6. Push the moving ring by hand after installation, which can make the moving ring move flexibly on the shaft and have certain flexibility;

7. Rotate the shaft by hand after installation, and the shaft should not feel light or heavy;

8. The equipment must be filled with medium before operation to prevent dry friction and seal failure;

Operating parameters:
Line speed:
Suitable medium:
Oil, water, acid, alkali, salt and other clean water and waste water, sewage, and dirty oil containing particles.
product features:
Sealing surface:
Graphite, tungsten carbide, silicon carbide
Auxiliary seal:
Nitrile, ethylene propylene, fluorine rubber, silica gel, flexible graphite, etc.
Metal components:
Structural features:
Single end face, rubber bellows compensation, strong anti-blocking ability
Contact us

Service hotline:0813-3202978

Working days: Monday to Saturday



No. 339-5, Kechuang 4th Road, High tech Industrial Park, Yantan District, Zigong City, Sichuan Province, China

Zigong Chuanmi Mechanical seal Co., LTD    蜀ICP备12011709号-1