Double Packing Fractional Flow Control Valve

An alternative to a bellows stem seal, it is used when standard packing will not adequately contain the controlled media. With a double packed bonnet, lubricant is pumped into the packing sets, providing a tight seal similar to bellows stem seal.

  • Pilot plant installations
  • Test stands
  • R & D facilities
  • Processing plants
  • Specialized processing plants
  • Government agencies
  • Hazardous service


  • Chemical, refining & petrochemical
  • Oil & gas
  • Process or industrial
  • Test equipment & services
Features & Benefits
  • Ideal for applications where service conditions can damage a bellows assembly
  • Features standard bonnet port for use in lubricating the packing for added protection against leakage, or for use as a detection port for monitoring potential fugitive emissions
  • Optional side mounted or top mounted positioner

Seat Type: Globe – Class IV or VI

Sizes: 1/4″ – 3/4″ (DN8 – DN20)

End Connections: Threaded, Socket Weld, Integral Tube Nuts, 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 side-mounted positioner


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.


ATEX Certified

Get A Quote

Related Products

Mark 708 Series

Precision Control, Fractional Flow Control Valve

Quick Quote

Know what you need and want a quote quickly? We can help! Fill out this form and we will get back to you shortly.