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How Seismic Shut-Off Valves Work

Seismic valves automatically shut off the gas to your building when an earthquake occurs.

Seismic Automatic Gas Shut-off valves are a simple, but effective way to ensure you never experience the terror of a gas fire after an earthquake. They operate on movement and shut-off the supply of gas to a building, when triggered by a 5.4 magnitude or larger earthquake. The operation of a Horizontal Seismic Valve can be seen in the illustration below:
Cutaway view of horizontal Valve
Cutaway view of horizontal Valve
Cutaway view of horizontal Valve

Reach Out With Your Questions

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MBS Engineering
12855 Alcosta Blvd.
San Ramon, CA 94583, USA
Phone ​(925) 334-7200
info@mbs.engineering

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  • Home
  • Services
    • Gas Leak Detection & Repair >
      • Gas System Survey
      • Gas Pressure Regulators
      • Excess Gas Flow Valves
      • Leak Detection Technology
      • Natural Gas Leak Survey Glossary
    • Excavation, Trenching, Grading >
      • Excavation
    • Plumbing Services
    • Seismic Shut-Off Valve Installation >
      • How Seismic Shut-Off Valves Work
    • Gas Turbines >
      • About Gas Turbines >
        • Is A Turbine Right For My Company?
        • How To Get Your Gas Turbine Power Solution
      • Cogeneration or Combined Heat And Power
      • For Hemp Growers
      • For Breweries
      • For Refrigerated Storage And Food Processing
      • For Critical Infrastructure Emergency Power
      • For IT Data Centers
      • For Office Buildings, Stadia And Convention Centers
      • For Schools
      • For Manufacturing And Production
      • For Warehouses And Fulfillment Centers
      • For Agriculture
    • New Construction & Re-Piping >
      • Horizontal Drilling Or Directional Drilling And Directional Boring
      • Gas Bypass Line Construction
    • Custom Fabrication
    • Gas Line Maintenance
  • Regions
    • San Francisco Bay
    • Northern California
    • California Central Valley
    • California Central Coast
    • Greater Los Angeles
    • San Diego
  • Industries
    • Gas Services For Hotels
    • Gas Services For Hospitals
    • Gas Services For K-12 Schools
    • Gas Services For Colleges
    • Gas Services For JPAs And Insurers
    • Commercial Segments >
      • General Commercial
      • Municipal And Infrastructure Gas System Construction And Maintenance
      • Federal And Defense Gas System Construction And Maintenance
  • Resources
    • Library
    • Graphics >
      • Gas Safety Response Flow Chart
      • Gas Turbines
      • Problems With Older Gas Systems
      • How To Spot A Gas Leak
      • What Is A Seismic Shut-Off Valve?
      • How Does Natural Gas Get To Us?
      • Natural Gas Basics
      • Exercising Your Valves
      • The Road To Gas Safety
      • Sustainable Energy Comparison Chart
    • Natural Gas Free eBooks >
      • Are You Liable For A Gas Accident On Your Property?
      • Earthquakes And Natural Gas Fires
      • Natural Gas And School Safety
      • The Coming California Energy Shortage
      • JPA And Insurer eBook
  • Contact
  • About Us
    • Photo Gallery
    • Blog
    • MBS In The News
    • Our Company
  • Projects