Process Valves > Control Valves > Lowflow Mark 708

Lowflow Mark 708 Fractional Flow Control Valve for Ultra-Low Cv

Lowflow's 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. The Mark 708's rolling diaphragm design ensures that the effective diaphragm area remains relatively constant, regardless of valve stem position. A bolted body/bonnet connection simplifies maintenance — remove and replace the trim to change flow rates without removing the valve body from the process line.

Key Specifications

  • For steam, air, gas, oil, water, and chemical service
  • Cv ranges from 0.00001 to 4.0 available in 1/4" to 3/4" line sizes
  • Carbon steel or stainless steel body and bonnet, 14M rolling Nylon diaphragm, spring-loaded TEF/Chevron stem packing (good to 450° F)
  • Extended orifice, plug guiding standard for improved shutoff and accuracy