GVS MALEMA Valves

GVS MXF Emergency Excess Flow Shut Off Valves

SIL 3

The GVS MXF is a fail-safe emergency shut-off valve designed to operate in critical scenarios where power, internet connectivity, or air supply may be compromised. Engineered and calibrated in Canada to meet the specific needs of global applications, the MXF responds to line-break-induced pressure differentials by automatically closing the flow. Once downstream repairs are complete, the valve can be manually reset to resume operation.

Technical Specifications

  • Sizes: 3/4″ and larger
  • Pressures: ANSI Class 150 – 2500
  • Ends: RF, SW, BW, and Threaded Connections
  • Materials: Casting in Ductile Iron, WCB, LCB, CF8M, and Exotic Alloys
  • Fire Safe Design Available Fire Safe Design Available
  • SIL 3 Certified SIL 3 Certified

Features

  • In-Line Resettable
  • Broad Calibration Range
  • Effective Operation with Liquid, Gas or a Mix
  • In-line Flow

Applications

  • Fuel Lines
  • Pollution Control Systems
  • Chemical Processing
  • Gas & Hydraulic Lines
  • Petroleum & Gas Installations
  • LPG Systems

Options & Catalog

Catalogue

PDF

Swipe left or right to see other products
GVS MXF Safety Excess Flow Valve

GVS MXF Safety Excess Flow Valves

GVS MXF Safety Excess Flow Valves are used in the energy industry to provide automatic shut-off in the event of a sudden flow surge or line rupture, preventing uncontrolled gas or fluid discharge. These valves are commonly installed in fuel gas supply lines, LNG systems, compressed gas networks, and emergency distribution manifolds, where mechanical closure is required without reliance on electricity, air supply, or control systems. Their passive, pressure-differential design makes them ideal for remote installations, off-grid facilities, and critical safety systems where rapid isolation is essential to minimize risk to personnel, equipment, and the environment.

  • Fuel Gas Supply Lines: Automatically shut off gas flow in the event of a rupture or downstream line break, protecting combustion systems.
  • LNG Systems: Provide mechanical shut-off during rapid discharge or failure in cryogenic transfer lines, preventing hazardous spills.
  • Compressed Gas Networks: Serve as passive safety devices that isolate sections of piping during sudden pressure drops or equipment failure.
  • Emergency Distribution Manifolds: Ensure safe, immediate flow interruption in critical gas or fluid supply systems without external power.
  • Remote Installations: Offer fail-safe protection in off-grid energy sites where electronic or pneumatic actuation is not feasible.
  • Turbine Fuel Trains: Prevent excessive fuel discharge in the event of line damage, enhancing fire safety around high-temperature rotating equipment.