The Flowserve Valtek Mark Six is a globe-style, single-seat, top-entry automatic control valve with a fabricated extension for cold box cryogenic applications to -425°F/?218°C. Mark Six bodies are constructed of bronze or austenitic stainless steel for high impact strength at low temperature and minimum heat transfer. Mark Six is designed for high flow capacity with a minimum of mass to reduce boil-off on valve cool-down.
| Valve Size | 1/2" to 10" |
| Pressure Class Standard | ASME B16.34 |
| Pressure Class Range | Class 150, 300, 600 |
| Body | Globe, Angle |
| End Connections | Integral Flange, Socket Weld, Butt Weld |
| Face-to-Face Standard | ANSI ISA S75.15 |
| Bonnet | Standard, Extended, Cold Box Extended, Cryogenic, Bellows Seal |
| Packing | Standard, Twin 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 |
| Certifications | Canadian Registration Number (CRN) |
| 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 |
