Long Trim Life —NotchFlo DST control valves feature a protected seat design whereby the shutoff function is separate from the throttling areas of the trim.
Class V Shutoff — Use of hardened metal seats provides tight shutoff to minimize seat erosion.
High Pressure Drops — Rugged cage guiding of the plug, combined with a staged pressure drop, enables the NotchFlo DST control valve to be effective in a wide range of allowable high pressure drop applications. It can be operated by either spring and diaphragm or piston actuators, depending on plug design (balanced or unbalanced) and application requirements.
Sour Service Capability — Materials are available for applications handling sour fluids. All references in this document are for NACE MR0175-2002 and MR0103 unless otherwise noted. Contact your Emerson sales office for information on NACE MR0175/ISO 15156.
Availability — NotchFlo DST control valves are available in both globe and angle valve body designs.
Specifications
Valve size: up to 8 inch
Pressure Rating:ANSI CL300-2500
End Connection Styles: flanged, butt-welded, RTJ, etc.
Materials:WCC, LCC, WC9,CF8M, CF8C,CD3MN
Other configurations: Contact us for more information.
Applications
FISHER NotchFlo DST control valves offer excellent control of liquid services with high pressure drops and entrained particulate.
The dirty service anti-cavitation trims feature multi-stage protection against damaging effects of cavitation and erosive solids.
Can be used in Sour Service.
Various high pressure and low pressure separator letdown in REFINING Plant
