CALIFORNIA (formerly known as Koso) Seismic Gas Shutoff
Valves are installed throughout the U.S. and in many countries
at risk from earthquakes. They performed well during the 1994
Northridge earthquake. CALIFORNIA Valves have a simple operation
principle, remain closed when tilted or bumped, and must be
manually reset, which enables safety inspections for leaks
and other hazards to be done before gas service is restored.
CALIFORNIA Valves have excellent flow characteristics, and
may be selected based on the size of a properly sized houseline.
CALIFORNIA Valves installed upstream of multiple houselines
should be selected based on the sum of the areas of each houseline.
CALIFORNIA Valves have a visual open/closed indicator and pressure
ratings up to 60 psi. For
all sizes, from ¾" through 8", we supply models
designed for horizontal flow, vertical flow from the bottom in, or
vertical flow from the top in. Valve ends are threaded for
¾" through 1-1/2" models, threaded or flanged
for 2" through 4" models, and flanged for 6" and 8"
models. Optional devices available at the time of order for any model of CALIFORNIA Valve can enable remote actuation or remote position monitoring.
Specification sheets are available by clicking
the desired category: 3/4" threaded, 1" threaded,
1-1/4" threaded, 1-1/2" threaded, 2" threaded,
2" flanged, 2-1/2" threaded, 2-1/2" flanged, 3" threaded, 3" flanged, 4"
threaded, 4" flanged, 6" flanged, & 8" flanged.
Basic installation instructions are available
for CALIFORNIA Valves designed for horizontal
flow from the bottom in, or vertical
flow from the top in. Additional information is
available for installations
for homes and small businesses, and for installations in vaults.
Information is also available in spanish: la
válvula sísmica KOSO.
CALIFORNIA Valves are listed by UL (to national
standard ASCE 25-97), certified by California's Division of
the State Architect (to State Standard 12-16-1), and approved
by Los Angeles (Research Report RR 5080). CALIFORNIA Valves have a limited factory warranty of 30 years when used in the USA or Canada, and 5 years when used elsewhere.
For more details, please review the capacity
charts for CALIFORNIA Valves and regulations
mandating the installation of seismic gas shutoff valves.
Since 1978, over 300,000 CALIFORNIA Valves have been installed on a wide variety of buildings supplied
with natural gas or vaporous propane. For partial lists of
buildings, companies, or facilities using CALIFORNIA Valves,
please click the desired category: Commercial
Parks, Museums, & Studios; Government
Management & Realty Companies; Religious
Facilities; and Residential
Our consulting services include arranging
permitted installations. To request a proposal, please submit
our seismic gas shutoff valve project questionnaire.