Precision Control, Fractional Flow Control Valve

The Mark 708 Series provides accurate control on fractional flow applications. It is a complete line of pneumatic and electrically actuated control valves designed to enhance performance to ensure precision control on your most critical micro flow applications.

  • Pilot plant installations
  • Test stands
  • R & D facilities
  • Processing plants
  • Specialized processing plants (dosing, injection and venting)

Industries

  • Aviation & aerospace
  • Chemical, refining & petrochemical
  • Oil & gas
  • Process or industrial
  • Test equipment & services
Features & Benefits

Rolling diaphragm

Spring-loaded TFE/Chevron packing

Bolted body/bonnet connection

Guided trim standard

Quick change trim standard (0.05 Cv and above)

Threaded bonnet for quick disassembly

Secondary stem connection eliminates stroke adjustment changing trim

Optional side mounted or top mounted positioner

Specifications

Seat Type: Globe – Class IV or VI

Sizes: 1/4″ – 3/4″ (DN8 – DN20)

End Connections: Threaded, Socket Weld, Integral Tube, Welded Flange

Body Materials: Carbon Steel, Stainless Steel, Hastelloy C, Monel, Alloy 20, others

Cv (Kv): 0.00001 to 4.0 (0,000009 to 3,4)

Ranges: 3-15 or 6-30 psi; split ranges are available with optional positioner

Resources

LowFlow Valve Express Shipments

Our LowFlow Valve Express Program offers you options to get the products you need, when you need them. Many of our products are available for next business day shipment. Look for LowFlow Valve Express in the product descriptions.

Installation and Maintenance Videos

We have designed a series of short videos to educate users about maintaining and installing our products.

Product Overview Videos

Watch our Product Overview videos that give a brief introduction to our products and their advantages in many applications.

Approvals

CRN Number

STEP Files

1/4″ MK708 with A105 CS Barstock, Hastelloy C, WCB CS, CF8M SS, or 316/316L SS Barstock with Integral Tube ends and 14M Actuator
1/4″ MK708 with A105 CS Barstock, Hastelloy C, or 316/316L SS Barstock with BSPT Ends and 14M Actuator
1/4″ MK708 with A105 CS Barstock, Hastelloy C, or 316/316L SS Barstock with BSPP Ends and 14M Actuator
1/4″ MK708 with A105 CS Barstock, Hastelloy C, or 316/316L SS Barstock with NPT Ends and 14M Actuator
1/4″ MK708 with A105 CS Barstock, Hastelloy C, or 316/316L SS Barstock with FSW Ends and 14M Actuator
1/4″ MK708 with WCB CS or CF8M SS with BSPP ends and 14M Actuator
1/4″ MK708 with WCB CS or CF8M SS with BSPT ends and 14M Actuator
1/4″ MK708 with WCB CS or CF8M SS with NPT ends and 14M Actuator
1/4″ MK708 with WCB CS or CF8M SS with FSW ends and 14M Actuator

1/2″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with BSPP ends and 14M Actuator
1/2″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with BSBT ends and 14M Actuator
1/2″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with NPT ends and 14M Actuator
1/2″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with FSW ends and 14M Actuator
1/2″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with Integral Tube ends and 14M Actuator
1/2″ MK708 with WCB CS or CF8M SS with BSPP ends and 14M Actuator
1/2″ MK708 with WCB CS or CF8M SS with BSPT ends and 14M Actuator
1/2″ MK708 with WCB CS or CF8M SS with 300#FE ends and 14M Actuator
1/2″ MK708 with WCB CS or CF8M SS with 150#FE ends and 14M Actuator
1/2″ MK708 with WCB CS or CF8M SS with PN16 ends and 14M Actuator
1/2″ MK708 with WCB CS or CF8M SS with NPT ends and 14M Actuator
1/2″ MK708 with WCB CS or CF8M SS with FSW ends and 14M Actuator
1/2″ MK708 with WCB CS or CF8M SS with Integral Tube ends and 14M Actuator

3/4″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with BSPP ends and 14M Actuator
3/4″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with BSPT ends and 14M Actuator
3/4″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with 150#FE ends and 14M Actuator
3/4″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with NPT ends and 14M Actuator
3/4″ MK708 with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with FSW ends and 14M Actuator
3/4″ MK708 with WCB CS or CF8M SS with BSPP ends and 14M Actuator
3/4″ MK708 with WCB CS or CF8M SS with BSPT ends and 14M Actuator
3/4″ MK708 with WCB CS or CF8M SS with 300#FE ends and 14M Actuator
3/4″ MK708 with WCB CS or CF8M SS with 150#FE ends and 14M Actuator
3/4″ MK708 with WCB CS or CF8M SS with NPT ends and 14M Actuator
3/4″ MK708 with WCB CS or CF8M SS with FSW ends and 14M Actuator

1/4″ MK708SP with A105 CS Barstock, Hastelloy C, WCB CS, CF8M SS, or 316/316L SS Barstock with Integral Tube ends and 14M Actuator and MK16IQ Positioner
1/4″ MK708SP with A105 CS Barstock, Hastelloy C, or 316/316L SS Barstock with BSPT Ends and 14M Actuator and MK16IQ Positioner
1/4″ MK708SP with A105 CS Barstock, Hastelloy C, or 316/316L SS Barstock with BSPP Ends and 14M Actuator and MK16IQ Positioner
1/4″ MK708SP with A105 CS Barstock, Hastelloy C, or 316/316L SS Barstock with NPT Ends and 14M Actuator and MK16IQ Positioner
1/4″ MK708SP with A105 CS Barstock, Hastelloy C, or 316/316L SS Barstock with FSW Ends and 14M Actuator and MK16IQ Positioner
1/4″ MK708 with A105 CS Barstock or CF8M SS with BSPP ends and 14M Actuator and MK16IQ Positioner
1/4″ MK708 with A105 CS Barstock or CF8M SS with BSPT ends and 14M Actuator and MK16IQ Positioner
1/4″ MK708 with A105 CS Barstock or CF8M SS with NPT ends and 14M Actuator and MK16IQ Positioner
1/4″ MK708 with A105 CS Barstock or CF8M SS with FSW ends and 14M Actuator and MK16IQ Positioner

1/2″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with BSPP ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with BSBT ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with 150#FE ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with NPT ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with FSW ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with Integral Tube ends and 14M Actuator and MK16IQ Positioner

1/2″ MK708SP with WCB CS or CF8M SS with BSPP ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with WCB CS or CF8M SS with BSPT ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with WCB CS or CF8M SS with 300#FE ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with WCB CS or CF8M SS with 150#FE ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with WCB CS or CF8M SS with PN16 ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with WCB CS or CF8M SS with NPT ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with WCB CS or CF8M SS with FSW ends and 14M Actuator and MK16IQ Positioner
1/2″ MK708SP with WCB CS or CF8M SS with Integral Tube ends and 14M Actuator and MK16IQ Positioner

3/4″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with BSPP ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with BSPT ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with 150#FE ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with NPT ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with A105 CS Barstock, Hastelloy C, 316/316L SS Barstock or Alloy 20 with FSW ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with WCB CS or CF8M SS with BSPP ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with WCB CS or CF8M SS with BSPT ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with WCB CS or CF8M SS with 300#FE ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with WCB CS or CF8M SS with 150#FE ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with WCB CS or CF8M SS with NPT ends and 14M Actuator and MK16IQ Positioner
3/4″ MK708SP with WCB CS or CF8M SS with FSW ends and 14M Actuator and MK16IQ Positioner

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Related Products

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Mark 708BS Series

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Mark 708CR Series

Extended Bonnet Fractional Flow Control Valve

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