Level Controllers

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Series EVS Pneumatic Liquid Level Controller

Easy-access, back-mounted unit that provides liquid level or interface control for gas separator and scrubber applications. Series EVS controllers feature patented Envirosave® snap (on/off) pilots, which prevent fugitive emissions and reduce bleeding of valuable gases. The Envirosave® pilot was rated at zero leakage in a U.S. EPA Natural Gas STAR Program report.*

*Natural Gas STAR Program report: Technical Support Documents; Options for Reducing Methane Emissions from Pneumatic Devices in the Natural Gas Industry; Appendix A: Gas Bleed Rate for Various Pneumatic Devices; August 18th, 2003.

Series EVS controllers operate using Norriseal’s force-balance technology, which delivers proven reliability and long service life. Service-enhanced design makes units simpler to install and easy to access for routine maintenance. EVS controllers accommodate both low- and high-pressure applications, making them ideal for a wide range of uses in natural gas production, compression and gas processing.

  • Back-mount design with flush-mount internals simplifies installation and inspection
  • Envirosave pilot rated at zero leakage in U.S. EPA Natural Gas STAR Program report
    *Natural Gas STAR Program report: Technical Support Documents; Options for Reducing Methane Emissions from Pneumatic Devices in the Natural Gas Industry; Appendix A: Gas Bleed Rate for Various Pneumatic Devices; August 18th, 2003.
  • Uses Norriseal’s force-balance technology, for proven reliability and long service life
  • High sensitivity for either Top Level or Interface control
  • Weather-resistant sealed enclosure
  • Complies with NACE MR0175-2002

Output:
Envirosave, snap: 0–20 psig, 0–30 psig
Optional: Throttle, proportional 3–15 psig, 6–30 psig
Snap, on/off: 0–20 psig, 0–30 psig
Supply Pressure Required:
3–15 psig, 0–20 psig: 20–30 psig (min.)
6–30 psig, 0–30 psig: 35– 40 psig (min.)
Ambient Temperature:
–20° to +180°F
(–29° to 82°C)
Materials:
Body:
Throttle: Aluminum w/Aluminum Seat
Snap: Aluminum w/Aluminum Seat
Envirosave: Aluminum w/Elastomeric Seat
Gasket/diaphragm: Nitrile
Internal Valving: Nylon
Filter Element: 40 Micron SST
Screws & Nuts: SST