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The Mark 708 was developed to provide the most accurate control available for fractional flow services: whether for pilot plant installations, test stands, R & D facilities or for specialized processes such as dosing, injection and venting applications. With Cv’s ranging from 0.00001 to 4.0 available in 1/4″ through 3/4″ line sizes (0,000009 to 3,4 Kv in sizes DN8 through DN20), the Mark 708 offers design features that will provide enhanced performance to insure precision control on your most critical micro-flow applications.
Minimum Data Requirements to Size Valve
The Mark 8000 Series is a group of heavy-duty control valves specifically designed for process applications requiring full flow or fractional flow control. Available in a wide selection of body sizes and styles, this valve can be configured in two-way or three-way designs, for diverting or mixing service, and with globe or angle valve style seats. It can be ordered with a bellows stem seal, or an extended bonnet extension for cryogenic applications down to -425°F (-254°C), or with an electric actuator. It has a totally enclosed multi-spring actuator, which minimizes deadband and is field reversible without the use of special tools or extra parts. LowFlow Valve can also install a wide variety of positioners and actuators on the Mark 8000 to provide a valve that meets specific requirements. The Mark 8000 Series valve subassembly is manufactured completely from barstock, which combined with the standard heavy duty yoke and actuator, gives the valve the ability to handle pressure up to 6000 psi (414 bar), while still being able to offer Cv’s ranging from 0.05 – 17 (Kv’s 0,04 to 14.6). The barstock body design also allows greater flexibility when specialty materials are required. While the standard body materials are Stainless Steel and Carbon Steel, the Series 8000 can be manufactured in almost any exotic alloy, including Alloy 20, Hastelloy, Inconel and Monel. The Mark 8000 body material is not limited to alloys. I can also be manufactured in PVC or Kynar for applications where thermoplastics offer a better solution over alloy materials.
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