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DHTW and UHTW pusher-type mechanical seals are custom engineered to deliver exceptional reliability in high energy, critical pumping applications.

DHTW and UHTW seals are balanced, flexible stator cartridge seals available in single or dual seal configurations.
Features
  • Unmatched Performance And Extended Seal Life Derived From FEA-Designed Seal Faces That Boast Zero Net Deflection From Thermal, Hydraulic, And Dynamic Forces.
  • Superior High Temperature, Slow Roll, And Hot Standby Operation Enabled By High Performance Circulating Features The Deliver Optimum Cooling At All Operating Speeds.
  • Reliable Operation In High Speed Services Achieved Via Precisely Controlled Seal Face Balance Ratio.
  • Withstands Torque From High Viscosity Fluids And High Speeds With Robust Drive Engagement.
  • Extended Equipment Uptime With Available Secondary Containment Options.

Specifications

Arrangement 1 Single Seal (Common Piping Plans 11, 13, 32, 62)

  • UHTW

Arrangement 1 Single Seal (Piping Plan 23)

  • DHTW

Arrangement 2 Unpressurized Dual Seal with Dry Running Back-Up (Common Piping Plans 72, 75, 76)

  • UHTW / GSLW

Arrangement 2 Unpressurized Dual Wet Seal (Common Piping Plans 52)

  • UHTW / DHTW

Arrangement 3 Pressurized Dual Wet Seal (Common Piping Plans 53A, 53B, 53C)

  • DHTW / DHTW

Arrangement 3 Pressurized Dual Wet Seal (Piping Plan 54)

  • UHTW / UHTW

Pressure

  • Up to 207 bar (3000 psi)

Sizes

  • 25.4 to 228.6 mm (1.000 to 9.000”)

Speed

  • Up to 76 m/sec (250 ft/sec)

Temperature

  • -40° to 371° C (-40° to 700° F)
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