Skip to main content

Mark One-X

Linear Globe/Angle Control Valves - Mark One-X

BRAND: Valtek

The Mark One-X offers a cost-effective means of installing a small valve in a much larger line without line reducers or
expanders. It is identical to a standard Mark One except for its body, which has expanded outlets.


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

industry sectors

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

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 400°C
(-320°F to 752°F)

Design Range

Size Range: DN up to 300; NPS up to 12

Pressure Class Range: PN 50 to 100; Class 300 to 600

Features & Benefits

• Lower valve and installation costs made possible by using a smaller, lighter valve and eliminating line expanders and reducers (plus their associated welding and radiography requirements)
• Reliable, predictable performance provided by the position accuracy, repeatability and assured response of the stiff and high-thrust, spring-cylinder actuator
• Reduced downtime with clamped-in seat and self-aligning seat ring
• Decreased inventory carrying costs from a high degree of interchangeability with Mark One Series valves


Our global expertise and local service centers ensure that you stay up and running. Learn more about our services.

Learn More

Use Flowserve VirtualPlant 3D models of various plant types to help you 'see' our capabilities in key industrial applications.

Explore Now