Mark 708CR Series
Extended Bonnet Fractional Flow Control Valve
The Mark 708CR controls fractional flows in cryogenic service down to −320°F (−195°C). Its 9-inch bonnet extension, with an optional 14-inch extension, helps protect the packing and actuator from ice buildup that can affect stem movement. Applications include pilot plants, research facilities, and low-temperature systems handling media such as liquid CO₂, nitrogen, and hydrogen.
- Pilot plant installations
- R & D facilities
- Liquid CO2
- Hydrogen
- Nitrogen
- Low temperature applications
Industries
- Aviation & aerospace
- Chemical, refining & petrochemical
- Oil & gas
- Process or industrial
- Test equipment & services
- Protects the packing and actuator by preventing ice build-up which can interfere with stem movement
- Wide range of interchangeable trims
- TFE chevron ring packing
- Optional side mounted or top mounted positioner
Seat Type: Globe – Class IV
Sizes: 1/4″ – 3/4″ (DN8 – DN20)
End Connections: Threaded, Socket Weld, Integral Tube, Welded Flange
Body Materials: Stainless Steel, Hastelloy C, Monel, Alloy 20, others
Cv (Kv): 0.05 to 4.0 (0,04 to 3,4)
Ranges: 3-15 or 6-30 psi; split ranges are available with optional positioner
Installation and Maintenance Videos
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Product Overview Videos
Watch our Product Overview videos that give a brief introduction to our products and their advantages in many applications.
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1/4″ MK708CR with CF8M SS with BSPP ends and 14M actuator
1/4″ MK708CR with CF8M SS with BSPT ends and 14M actuator
1/4″ MK708CR with CF8M SS with NPT ends and 14M actuator
1/2″ MK708CR with CF8M SS with BSPP ends and 14M actuator
1/2″ MK708CR with CF8M SS with BSPT ends and 14M actuator
1/2″ MK708CR with CF8M SS with NPT ends and 14M actuator
1/2″ MK708CR with CF8M SS with FSW ends and 14M actuator
3/4″ MK708CR with CF8M SS with BSPP ends and 14M actuator
3/4″ MK708CR with CF8M SS with BSPT ends and 14M actuator
3/4″ MK708CR with CF8M SS with NPT ends and 14M actuator
3/4″ MK708CR with CF8M SS with FSW ends and 14M actuator
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Mark 708 Series
Precision Control, Fractional Flow Control Valve
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