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U/D Series Pusher Seal
Brand: Flowserve CorporationUC Series seals are balanced pusher seals with a substantial single coil spring that provides exceptional performance in the most demanding services including refineries, pipelines, and petrochemical services.
UC seals are fully compliant with API 682, Type A requirements.
D Series seals are based on the UC Series, and add a pumping ring built into the rotating seal face body that establishes an exclusive Plan 23 cooling chamber around the seal faces.
D Series seals excel in high temperature boiler feed water and hot hydrocarbon services.
Features- Extended Service Life In Heavy-Duty Services Assured By Rugged Single Pusher Seal With Thick Cross Section Components.
- Increased Reliability Via Large, Low Spring Rate Single Coil Spring That Tolerates Axial Setting Dimensions While Reducing Opportunity For Clogging And Hang-Up From Solids.
- Consistent Seal Face Contact Provided By Robust U-Cup Seal And Spring Holder.
- Low-Emissions Performance Enabled By Silicon Carbide Rotating Face Mounted On Graphite Ring In UC And UCQ Seals, Preventing Shrink Fit Distortions And Sustaining A Flat Seal Face.
- High Pressure Performance In UO, UOP, D, And DP Seals Enabled By Silicon Carbide Rotating Face Mounted On O-Ring, Preventing Shrink Fit Distortions And Sustaining A Flat Seal Face.
- Cost-Effective Operation Ensured By Integrated Pumping Ring In D And DP Seals That Establishes An Exclusive Plan 23 Cooling Chamber Around The Seal Faces And Eliminates The Expense Of Cool Injection Systems.
Specifications
Configurations
- Arrangement 1 Single Seal (Common Piping Plan 23)
- Arrangement 1 Single Seal (Common Piping Plans 11, 13, 32, 62)
- Arrangement 2 Unpressurized Dual Seal with Dry Running Backup (Common Piping Plans 72, 75, 76)
D Series
- -73 to 343° C (-100° to 650° F)
U Series
- -40 to 204° C (-40 to 400° F)
UC
- Up to 27.6 bar (400 psi)
UO & D
- Up to 68.9 bar (1000 psi)
UOP & DP
- Up to 103.4 bar (1500 psi)