Eliminate the risk of gas leaks during earthquakes. Our seismic shut-off valve instantly cuts gas flow when ground motion is detected β fully compliant with ANSI/UL, CE, and international seismic standards. Designed for plant managers, facility engineers, and gas utility operators who demand zero-compromise safety.
β ISO 9001:2015 certified • 10+ years export experience • 500+ installations across USA, Saudi Arabia, South Africa, Italy
Seismic events damage gas pipelines in seconds. Without an automatic shut-off, escaping gas creates fire and explosion hazards. 60% of post-earthquake fires are caused by ruptured gas lines (USGS data).
California, Washington, Oregon, and 12+ US states now mandate seismic shut-off valves for commercial and industrial buildings. Non-compliance can lead to $50k+ fines, legal liability, and shutdown orders.
Expecting staff to manually close valves during a quake is unrealistic. Studies show average response time is 4β8 minutes β too late for a gas leak that ignites in seconds.
βCheapβ valves fail to reseat properly after activation, requiring costly emergency replacements. One unplanned shutdown can cost a mid-sized plant $15,000β$80,000 per day.
Not all βseismic valvesβ meet US seismic certification. Poor welding, substandard materials, and lack of factory testing lead to failures when it matters most.
Overseas suppliers often quote 60β90 day lead times and surprise freight charges. You need a partner who ships fast, at fair rates, with full documentation.
Sound familiar? See how Thriveon eliminates each of these risks β
Our natural gas seismic shut off valve is an automatic, mechanical-trigger device that instantly stops gas flow when seismic acceleration exceeds a pre-set threshold (0.20g β 0.60g adjustable). No electricity required β truly fail-safe. Designed for natural gas, propane, and LPG systems in commercial buildings, industrial plants, schools, hospitals, and utility stations.
We own the entire production chain: casting, machining, assembly, testing. 15,000γ‘ facility, 200+ skilled workers, 12 engineers. You get factory pricing and total quality control.
Every valve is 100% pressure tested and calibrated before shipping. ISO 9001:2015, CE/PED, UL pending. 5-year warranty on mechanical components.
Need custom flange drilling, special trim, or branded packaging? We offer full OEM/ODM service with 15-day turnaround on prototypes. Over 200 custom configurations delivered in 2024.
Standard lead time 25β35 days (vs. industry average 60β90 days). Emergency rush orders in 15 days available. We maintain a buffer stock of 5,000+ units for quick dispatch.
Valves meet ASME B16.34, ANSI/UL 144, IBC 2024, and California Title 24 seismic requirements. Full documentation package: material certificates, calibration reports, CE Declaration of Conformity.
Our engineering team (average 12 years experience) provides free technical consultation, valve sizing, and installation guidance. Reply within 2 hours β real people, not chatbots.
| Parameter | Specification |
|---|---|
| Valve Size Range | 1/2β³ β 4β³ (DN15 β DN100) |
| End Connections | NPT threaded, ANSI 150/300 flanged, socket weld |
| Body Material | Cast steel WCB / Stainless steel CF8M (304/316) |
| Trim Material | 316 SS / Monel (optional) |
| Seismic Trigger Threshold | 0.20g β 0.60g (field adjustable) |
| Response Time | < 0.5 seconds from trigger to full closure |
| Maximum Operating Pressure | 150 PSI (10.5 bar) standard; up to 300 PSI optional |
| Operating Temperature | -40Β°F to 180Β°F (-40Β°C to 82Β°C) |
| Leakage Rate | Zero leakage (Class VI per ANSI/FCI 70-2) |
| Cycle Life | > 10,000 cycles without performance degradation |
| Certifications | ISO 9001:2015, CE/PED, UL pending, ASME B16.34 |
| Warranty | 5 years (mechanical parts) |
Note: Custom thresholds, materials, and end connections available for OEM/ODM orders. Request your custom spec sheet β
seismic gas shut off valve seismic gas shutoff valve seismic shut off valve gas
A natural gas seismic shut off valve is a safety device that automatically stops gas flow when it detects ground acceleration from an earthquake. It uses a mechanical pendulum or spring-mass trigger β no electricity needed. When seismic motion exceeds a preset threshold (e.g., 0.40g), the valve closes instantly and remains shut until manually reset. This prevents gas leaks that could cause fires or explosions.
Regulations vary. California (Title 24), Oregon, Washington, and Utah have adopted mandatory seismic shut-off valve requirements for commercial and multi-family buildings. Other states are following IBC 2024 guidelines. We recommend consulting your local building department. Thriveon can provide compliance documentation to help you pass inspection.
Absolutely. We offer full OEM/ODM services: custom body casting with your logo, specific flange drilling (ANSI, DIN, JIS), special trim materials, and custom packaging. Minimum order quantity for OEM is 50 units. Contact us with your requirements for a quick quote.
Standard lead time is 25β35 days. Rush orders (15 days) available for an additional fee. Shipping cost to US West Coast (Los Angeles, Seattle) by sea: approximately $500β$1,200 for a pallet of 20β50 units depending on size. We offer DDP (Delivered Duty Paid) options β no hidden fees. Air freight also available.
Reset is manual and straightforward: turn the external reset handle 90Β° clockwise until you feel a positive stop. A visual indicator shows "OPEN" position. No tools required. We include a reset instruction tag with every valve. Always perform a leak test after reset before restoring full gas flow.
All Thriveon seismic shut-off valves carry a 5-year mechanical warranty against defects in materials and workmanship. We offer free technical support for the lifetime of the product. Spare parts (trigger assemblies, seals) are in stock and ship within 7 days. Our engineering team can assist with installation troubleshooting via video call.
Yes, the trigger threshold is field adjustable from 0.20g to 0.60g using a simple screw mechanism (calibrated scale provided). Adjustment takes less than 5 minutes. Factory default is set to 0.40g, which meets most building codes. Sealing wire available to prevent tampering after calibration.
Yes, we offer free sample valves for qualified buyers (shipping cost only). Samples are fully calibrated and tested. You can verify performance, fit, and documentation before committing to volume orders. Request your free sample today.
"Weβve been using Thriveon seismic valves for 2 years across 14 facilities. Zero failures. The calibration consistency is remarkable β every valve we tested was within 2% of the set point. Their documentation package made our state inspection effortless. Highly recommended for any plant engineer."
"We imported 200 units for a large hotel project in Dubai. Thriveonβs OEM service was top-notch β they matched our brand color and logo perfectly. Delivery was 28 days, 2 weeks faster than our previous supplier. The valves performed faultlessly during site testing. Will definitely order again."
"Good quality for the price. We installed 30 valves in a school district retrofit project. The only hiccup was that one valve needed recalibration out of the box β but Thriveonβs support team sent a replacement via DHL within 3 days. No complaints overall, solid product."
"Weβve been sourcing valves from China for 8 years. Thriveon is the most reliable partner weβve found. Their communication is prompt, they actually understand US codes, and the product quality speaks for itself. Weβve reduced our valve costs by 37% compared to European suppliers."
"Outstanding technical support. I had a question about flange torque specifications for a high-pressure installation. Their senior engineer hopped on a WhatsApp video call within 30 minutes and walked me through it. That level of service is rare. Valve works perfectly."
Get your free sample and custom quote within 24 hours. No minimum first order β we help you start small and scale.
β³ Limited-time offer: Free sample shipping for first 50 inquiries in March 2026. Use code SEISMIC2026.
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Call us on:
+86-311-86935302
+86-311-86935302
Email Us:
info@thriveonvalve.com
South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China 
π€ Trusted by Gas Safety Professionals Across 4 Continents
"We installed 48 units across 12 school sites in Los Angeles. The calibration accuracy and fast closure give us peace of mind. Thriveonβs team helped us meet California Title 24 with full documentation."
"We switched from a European supplier to Thriveon for our natural gas seismic shut off valves. 40% cost savings, same quality, and 30-day delivery instead of 90. Their OEM service allowed us to brand under our own name."
"Thriveonβs engineers helped us select the correct valve size and trigger threshold for our chemical plant. The zero-leakage performance exceeded our expectations. Already placed 3 repeat orders."
π Certifications & Compliance