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Mark 708 – a complete line of pneumatic and electric control valves developed specifically for the unique properties and conditions encountered in fractional flow services.
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A valve that offers Cv’s ranging from 0.00001 through 0.2 (0,000009 to 0,17 Kv in DN8).
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The Mark 708 with bellows stem seals that eliminate fugitive emissions by surrounding the valve stem with a pressure-tight barrier, isolating the stem from the process fluid and preventing leakage to the atmosphere.
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The Mark 708 for cryogenic service features a 9” bonnet extension that provides protection for the packing and actuator by preventing ice build-up, which can interfere with movement of the valve stem and affect valve performance.
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The Mark 708 with double packing is an alternative to a bellows stem seal and is used when standard packing will not adequately contain the controlled media.
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A 8,000 psi (552 bar) maximum inlet fractional flow control valve.
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A 12,000 psi maximum inlet fractional flow control valve.
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THe Mark 708HT Series has a cooling fin bonnet option for protection of the stem packing from elevated temperatures associated with steam, hot water and high temperature oil, gas and liquid services.
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A lightweight control valve for use as a mixing valve in low flow process applications.
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A group of heavy-duty control valves specifically designed for process applications requiring full flow or fractional flow control.
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The three-way Mark 8000T can be specified for use on mixing or diverting services.
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The 8000 Series with bellows stem seals eliminates fugitive emissions by surround the valve stem with a barrier.
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