Three Way Control Valve

The Mark 709 is a lightweight control valve for use as a mixing valve in low flow process applications. Featuring a three-way body design, it is constructed with two inlets to blend two separate flow streams into a common outlet, creating a third fluid.

  • Mixing
  • Bypass
  • Chemical injection
  • Dosing
  • Pilot plants
  • Research labs


  • Aviation & aerospace
  • Chemical, refining & petrochemical
  • Oil & gas
  • Process or industrial
  • Test equipment & services
Features & Benefits
  • For low flow process applications requiring a three way body for mixing two separate flow sources into one common line
  • Compact, lightweight design for precise control
  • Multiple spring actuators in a choice of sizes for differential pressures up to 1460 psi (100 bar)

Seat Type: Globe – Class IV or VI

Sizes: 1/2″ & 3/4″ (DN15 & DN20)

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

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

Cv (Kv): 1.25 to 4.0 (1,1 to 3,4)

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


CRN Number
ATEX Certified

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