Mark Eight

Mark Eight

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

Brand: Valtek
Category: Linear Control Valves
Valve Size 1" to 18"
Pressure Class Standard ASME B16.34
Pressure Class Range Class 150, 300, 600, 900, 1500, 2500
Body Y-Pattern Globe
End Connections Separable Flange, Integral Flange, Screwed (NPT), Socket Weld, Butt Weld, Grayloc
Face-to-Face Standard Manufacturer Standard
Bonnet Standard, Extended, Cold Box Extended, Cryogenic, Bellows Seal
Packing Standard, Twin Seal, Vacuum Seal, Environment Fugitive Emissions, Live-Loaded
Guiding Double Top Stem Internal to Bonnet
Trim Plug & Clamped Seat, Special Cage & Stack Designs
Trim Characteristics Equal Percentage, Linear, Quick-Open
Seating Metal-to-Metal & Soft
Shut-Off Classification ANSI FCI 70-2 Class IV, V, VI

Lower valve recovery factor and higher Cv per given size over traditional globe style valves due to straight-through passage

Significantly reduced noise and vibration owing to less restrictive body style, which generates less line turbulence

Double Top Stem Guiding moves the critical function of assuring alignment of the trim out of the flow path

Single Piece Plug & Stem assures integrity of the assembly, avoiding side load fracturing

Oversized Stem provides greater durability for high-pressure applications

Plug Contours provide flow characteristics with higher rangeability than cage designs

Floating Seat is clamped in-place after alignment to ensure tight-shutoff and easy service

Seat Retainer (Cage) is not a throttling component, allowing for more cost effective material selection

Bolted Bonnet eliminates service issues related to threaded designs

Severe Service Trim options can easily be designed or retro-fitted into standard trim valve

Certifications Canadian Registration Number (CRN)
PED Directive 97/23/EC
Design Standards ASME B16.5 – Pipe Flanges & Flanged Fittings
ASME B16.9 – Factory-Made Wrought Buttwelding Fittings
ASME B16.10 – Face to Face & End Dimensions of Valves
ASME B16.11 – Forged Fittings, Socket-Welding & Threaded
ASME B16.25 – Buttwelding Ends
ASME B16.34 – Valve Flanged, Threaded, and Welding End
ASME SA Materials
ASTM A Materials
Quality IS0 9001:2008
ATEX QAN
IECEX QAR