8000 Series Control Valve with Bellows Stem Seals

Bellows Stem Seals, Control Valve

Bellows stem seals eliminate fugitive emissions by surrounding the valve stem with a pressure-tight barrier, isolating the stem from the process fluid and preventing leakage to the atmosphere. For an extra measure of protection, the bellows stem seal option provides a back-up seal of Teflon, braided or Graphite/Grafoil packing.

Pilot plant installations
Test stands
R & D facilities
Processing plants
Hazardous service
Fugitive emissions

Industries

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

Features & Benefits

Barstock, not cast, construction to avoid potential porosity issues
Available in Kynar, PVC and CPVC
Full compliance with most stringent requirements of the Clean Air Act
Secondary packing chamber with a bellows leak monitoring port for additional security
Two-piece stem allows stem adjustment without breaking the bellows bonnet extension seal

Specifications

Seat Type: Globe or Angle – Class III, IV or VI

Sizes: 1/2″ – 1-1/4″ (DN15 – DN32)

End Connections: NPT, BSPT, Raised-face Flanges (ANSI, DIN, JIS), Ring Type Joint Flanges, Socket Weld, Bolt-thru Flanged

Body Materials: Carbon Steel, Stainless Steel, Brass, Monel, Hastelloy B & C, Alloy 20, Kynar, PVC

Cv (Kv): 0.05 to 7.1 (0,04 to 6,2)

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

Documentation

Mark 8000BS Series Data Sheet

8000 Series I & M

CV vs Lift Chart

LowFlow Valve Product Overview Brochure