Seismic Valves

Earthquake Gas Shut Off Valves

MB Services is dedicated to saving lives and property in the event of an earthquake with our earthquake gas shut off valves. Because no one can accurately predict an earthquake we developed this automatic gas shutoff valve that activates and shuts off your home or business natural gas supply in the event of a 5.4 or greater earthquake. Peace of mind and safety for your family is why we developed it. Endorsed by the City of Los Angeles & JAPA, our valves are tested and approved.

Our valves are manufactured using state of the art CNC machining equipment that allows us to build consistent and reliable valves you can trust. Quality and safety are paramount in the production of our valves. Your families lives depend on our product working properly and we test every valve that leaves our plant for that very reason.


How It Works

Firefighter Gas Safety Valve Operation

Firefighters seismic valves work on a simple, consistent and accurate principle. Each valve is tested and certified before leaving the factory to meet approval from the State Board of Architect and LA Counties stringent requirements:

  • Both Valve Styles Shut-Off Gas Flow When Triggered by a 5.4 Magnitude Earthquake at the Valves Location.
  • All Designs are Patented or Patent Pending.
  • Valves Have Been Tested to ASCE 25-97, State of California 12-23-1 & ANSI Z21.70-1981 Standards for Seismic Gas Valves.

AGV Series
Horizontal Valve Operation

VAGV Series
Vertical Valve Operation