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HOME > DURASHIELD SEALS > SD SERIES
 

 

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An industry standard for over 30 years! The SD series unique design allows for simple installation and operation while providing effective sealing results. Widely used throughout the Dairy, Food and Bulk Materials processing industry as a dependable solution for sealing Bucket Elevators, Ribbon Blenders, Mixers, Screw Feeders, Crushers, Dryers and equipment under pressure or vacuum.

Durashield SD series seals address costly problems such as shaft leakage and material loss which lead to failed machinery and contaminated bearings. Our comprehensive seal rebuild kits allow for easy on-site maintenance. Please contact us for additional information

• Standard production shaft sizes from 0.500” to 6.00” (metric sizing is also available)
• Custom designs and additional larger shaft sizes up to 20" are available upon request.
• Durashield Shaft Seals come in Fully-Split, Semi-Split & Non-Split configurations.
• Easy on-site rebuilding with comprehensive rebuild kits

• General installation: download
• Air purge installation notes: download
• General maintenance: download
• SDNS rebuild and assembly procedure: download
• SDFS rebuild and assembly procedure: download
• SD series installation guide: download
• Technical specs & sizes: download

 


 

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• Housing : Machined High-Density Polyethylene (HDPE)
• Compression Sleeves: 304 Stainless Steel
• Faceplate: 304 Stainless Steel
• Elastomer Boot: EPDM-Silicone (FDA Compliant)
• Wear Plates: PTFE-Teflon (FDA Compliant)
• Wear Ring: 304 Stainless Steel
• Purge: Air
• Standard Process rated: -60˚F to 300˚F
• Seal thickness: 1.750"
 

 
• Pressure holding: 20 psig.
• Vacuum holding: 10 inHG
• Air purge connection start pressure: 15 psig. / 5psi-RUNNING
• Typical air loss: 1.5 - 2.0 SCFM
• Maximum shaft run out: .250" TIR.
• Stuffing box misalignment: .015 TIR per inch of shaft
• Shaft growth: ± 1/16”
• Shaft tolerance: ± 1/16”
• Max. out of square mounting deviation: 1°
• Field Repairable: Yes (Rebuild Kits)
• Torque setting for seal mounting: 50 pounds
• Shaft Speed: Variable by shaft diameter
• Processing Compatibility: Food, Dairy, Bulk materials &
Non-Corrosive Chemicals.

 
Shaft Dia.
-A-
Housing
-B-
Bolt Sq. Max
-C-
Bolt Sq. Min
-D-
Slot Width
-E-
Elastomer Adjust
-F-
Air Connect
-G-
Seal Width
-H-
0.500"- 1.00"
4.25"
3.25"
2.75"
.47"
1.54"
2.70"
1.75"
1.19" - 1.25"
4.75"
3.63"
2.88"
.47"
1.80"
3.00"
1.75"
1.38" - 1.44"
5.25"
4.00"
3.50"
.65"
2.05"
3.28"
1.75"
1.50" - 1.69"
5.50"
4.25"
3.85"
.65"
2.05"
3.50"
1.75"
1.75"- 2.00"
6.50"
5.13"
4.25"
.65"
2.50"
4.05"
1.75"
2.187"
7.25"
5.63"
4.88"
.75"
2.70"
4.55"
1.75"
2.25" - 2.50"
7.50"
5.88"
4.90"
.75"
2.90"
4.70"
1.75"
2.69" - 3.00"
8.00"
6.25"
5.60"
.80"
2.95"
5.10"
1.75"
3.38"- 3.50"
9.25"
7.48"
6.17"
.80"
3.45"
6.00"
1.75"
3.94"- 4.00"
10.25"
8.16"
6.67"
.93"
3.85"
6.50"
1.75"
4.43"- 4.937"
10.88"
8.88"
7.75"
.93"
3.97"
7.05"
1.75"
4.937"- 6.00"
11.50"
9.63"
8.63"
1.00"
4.20"
7.40"
1.75"


Dimensionally configured for type E and SCM medium duty 4-bolt flange bearings. Dura-Shield seals are also available for heavy duty RB end thrust bearings. Please contact us for more information.