Keystone Figure 638 F638 Series E/Series 2

Keystone Figure 638 F638 Series E/Series 2

The F638 SE/S2 is an extreme heavy duty slurry control valve, with an extended body style and replaceable body sleeve.

Certifications PED
End Connection Wafer
Application Metals Processing, Hard Surface, Dirty Service, Erosive, Control
Body Design Long Pattern
Material Carbon Steel
Operating Temperature Less Than 200 C
Pressure Class ASME
Process Connection Type CL150RF, CL300RF, CL600RF
Seat/Seal Type Metal
Standards ASME B16.34
Valve Size NPS 10 / DN 250, NPS 12 / DN 300, NPS 14 / DN 350, NPS 16 / DN 400, NPS 18 / DN 450, NPS 2 / DN 50, NPS 1-1/2 / DN 40, NPS 2-1/2 / DN 65, NPS 20 / DN 500, NPS 8 / DN 200, NPS 6 / DN 150, NPS 3 / DN 80, NPS 24 / DN 600, NPS 4 / DN 100
Valve Size Standard DN
Valve Type Butterfly
Media Solid
Stem Adjustable packing
  • Heavy robust construction.
  • Full repairability with replaceable internals for significantly extending valve life.
  • Extended body for protection of down stream piping.
  • Chrome Iron internals on the Series 2 coated with tungsten carbide.
  • Series 2 features tungsten carbide disc end spacers.
  • Swing through disc for minimal leakage at elevated temperatures.
  • Wing-style disc for optimum flow and wear resistance.
  • Venturi liner for improved flow control and thicker liner for wear resistance.
  • Improved mechanical seal to prevent the ingress of media to the bearing journals.
  • KTFE stem seals for ultimate resistance against caustic and acid applications.
  • Superior multiple stem seals.
  • Standardized mounting and drive adaptor connection allowing direct mounting of Keystone actuators and also allows for in-line actuator removal.

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