Valtek Mark One Control Valve

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  • States: NC, SC, VA
  • Summary: Valtek Mark One covers a wide range of applications in a single valve platform
  • Details
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  • Industry / Applications

Valtek Valve Product Selection

Founded in 1965, Valtek valves are known for reliability, long life, parts interchangeability, ease of maintenance and prompt delivery.

Key Features & Benefits:

  • Globe or Angle Design
  • Heavy Top Guiding
  • Severe Service Trim Available
  • Noise Reduction Trim
  • Anti-Cavitation Trim
  • VL Series Actuator
  • Field Reverable
  • Double Acting
  • Spring Return

Valtek Mark One Keeps It Simple

  • No special tools required
  • No close tolerance between the cage & plug
  • Seat ring is clamped into place 
  • Valtek Mark One covers a wide range of applications in a single valve platform.
  • Simplified spares w/ increased interchangeability
  • Simplified maintenance
  • Compact, field reversible actuator
  • State of the art digital positioner offerings

Speed is essential during routine maintenance and emergency repairs.  The Valtek Mark One Control Valve Quick-Ship Program sends quality, Flowserve-tested Mark One valves anywhere in North America in one week or less.  Often times a valve can be delivered within 24-48 hours.  The standard industry lead times for valves can range from 4 to 12 weeks.  Reduce maintenance-related downtime, receive high-quality control valves, and experience superior performance with the Valtek Mark One Control Valve.  


  • Body style: globe
  • Temperatures: -30°C to 400°C (-20°F to 750°F)
  • NPS sizes: 0.5 to 6
  • Pressure classes: 150 to 600
  • Body materials: WCC (carbon steel) and CF8M (316 SS)
  • Body bolting: A193-B7; nuts: A194-2H; zinc plate (or 304 SS,
  • studs: A193-B8; nuts: A194-8)
  • End flanges: integral or separable, 125 RMS raised face flange
  • Plug and seat: 316 SS, Alloy 6 overlay and 416 SS
  • Trims: full area and reduced
  • Bonnet: standard
  • Gaskets: PTFE, spiral graphite
  • Packing: PTFE V-ring, square graphite, SafeGuard™ Live Loaded, SureGuard™, SureGuard XT™
  • Actuator: VL series (aluminum — Buna-N and Viton® O-rings)
  • Handwheel: side-mounted and limit stop (25 and 50 VL)
  • Positioners: Logix 3800
  • Accessories: air filter, air filter regulator, coalescingair filter regulator (Valtek or selected boosters)

Valtek Mark One Sanitary Trim Valve

The Valtek® Mark One Sanitary Trim (Mark One-STM) valve is a high performance control valve designed to meet the special requirements of the food processing industry. The internal parts of the valve are built with streamlined flow passages, eliminating pockets which could cause fluid stagnation.

The Mark One-S features 316 stainless steel and PTFE wetted parts to prevent contamination and to promote easy cleaning. The special design assures self-drain- ing of the body gallery by allowing the process fluid to drain out of the downstream portion of the body when the valve is closed. Because of this design feature, normal flow direction is to open.

This valve includes all of the special features and ben- efits of the standard Mark One control valve.

The powerful cylinder actuator is compact and light weight – simplifying installation and maintenance.

Flowserve’s high thrust cylinder actuators are rated to 150 psi (10.3 Bar), eliminating the cost and maintenance of air regulators.

A characterizable cam positioner is mounted on most cylinder actuators. The cam allows modification of valve operation to match system requirements. Flowserve’s Valtek positioner, convertible between I/P and P/P, has four-way operation providing stable, accurate position- ing required for economical operation.

Separable end flanges are available, providing simple alignment of flange bolting for easy installation.

The valve’s simple design permits a high degree of interchangeability; thus, decreasing the number of required spare parts and saving money through sim- plified maintenance.

Watch Flowserve videos for product info, how-tos and repair info.

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