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Mark Eight

Linear Globe/Angle Control Valves - Mark Eight™

BRAND: Valtek

The Mark Eight features a unique Y-style globe body that provides higher flow capacities and less process turbulence than
conventional globe valves.


  • Power
  • Oil & Gas
  • Chemical
  • Water
  • General Industry

industry sectors

  • Nuclear
  • Conventional Steam
  • Geothermal
  • Combined Cycle
  • Concentrated Solar Power
  • Biomass and MSW
  • Upstream Exploration & Production
  • Midstream Transportation
  • Downstream Processing
  • Basic
  • Specialty
  • Biofuels
  • Pharmaceutical
  • Water
  • Waste Water
  • Agriculture
  • Water Management
  • Pulp & Paper
  • Mining
  • Steel & Primary Metals
  • Food & Beverage
  • Corn Wet Milling & Ethanol
  • Other Industries

IS0 9001:2008
PED Directive 97/23/EC
ATEX QAN Quality Registration
IECEX QAR Quality Registration
SIL Certification
CRN Certification (Canadian Registration)
EMC Directive 2004/108/EC
ATEX Directive 94/9/EC
CE Mark
SSOV (FM Safety Shut-off Valve Fuel Service
API 607 Fire Safe

Electronic Certifications for Logix Positioners mounted on Mark series valves

Design and Material Standards for Mark series valves
ASTM B16.5
ASTM B16.9
ASTM B16.10
ASTM B16.11
ASTM B16.25
ASTM B16.34
ASTM A (material)
ASTM SA (material)

Operating Parameters

-196°C to 815°C
(-320°F to 1500°F)

Design Range

Size Range: DN 25 to 500; NPS 1 to 20

Pressure Class Range: PN 10 to 400; Class 150 to 2500

Features & Benefits

• Lower valve recovery factor and higher Cv per given size over traditional globe style valves due to the nearly straight-through passage of the Y-style body
• Significantly reduced noise and vibration owing to less restrictive body style, which generates less line turbulence
• Easy, low-cost maintenance and extremely tight shutoff made possible by clamped-in seat and self-aligning seat ring
• Decreased inventory carrying costs from a high degree of interchangeability with Mark One Series valves


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