In modern chemical, petrochemical, and municipal gas networks, the integrity of process control parameters determines not only operational profitability but also environmental compliance and human safety. The terminology "Close Valves" fundamentally refers to emergency shut-off valves (ESVs)—such as normally closed (NC) and normally open (NO) gas solenoid valves—designed to restrict fluid or gas flow instantly upon receiving electrical commands or triggering events.
As global industrial infrastructure transitions to smart networks under Industry 4.0 paradigms, the demand for high-integrity, safety-certified shut-off valves has grown exponentially. According to international safety integrity levels (SIL), a valve is no longer just a mechanical barrier but an active loop component in safety instrumented systems (SIS). Choosing a qualified OEM supplier ensures that critical processes utilize valves constructed with precise tolerances, appropriate metallurgy, and safety ratings required by standard bodies like ATEX, CE, and CNAS.
The valve industry is moving rapidly away from passive mechanical setups. Modern systems integrate smart positioners and IoT interfaces that stream diagnostic data to centralized controllers, enabling real-time status tracking of critical close valves.
Compliance with explosion-proof standards, safety integrity ratings (SIL 2/3), and environmental emission laws is mandatory. Global buyers rely on suppliers who can provide fully traceable certifications alongside their custom-engineered valve hardware.
Valves must withstand aggressive media such as hydrogen, ammonia, and sour natural gas. Research into corrosion-resistant alloys, robust elastomers for seals, and specialized coatings has become standard for top-tier OEM factories.
Procurement directors and engineering teams in chemical plants, oil refineries, and municipal distribution networks prioritize system reliability above all. When sourcing emergency shut-off valves, they typically focus on three distinct technical dimensions:
An emergency shut-off valve must actuate instantly when a gas detector logs hazardous levels. High coil insulation ratings, fast response times (often under 1 second), and high dust-water resistance (IP65+) are necessary to guarantee execution under extreme field conditions.
Whether using RS485, Modbus, or proprietary wireless IoT protocols, smart close valves must interface seamlessly with detector controllers. For example, our JB-TB-AT2020F controller provides centralized orchestration, instantly triggering shutdown valves when warning thresholds are breached.
The manufacturing landscape has shifted from basic assembly to intelligent, data-driven automation. Operating out of our Chengdu and Deyang facilities, Xinhaosi utilizes state-of-the-art automation systems to achieve high quality and manufacturing efficiency.
Our manufacturing processes leverage automated machining centers and computer-controlled testing lines. By minimizing manual interventions, we reduce defect rates to negligible levels and guarantee that every solenoid valve conforms to exact engineering specifications.
This automated setup extends directly to safety inspections. Every valve is verified for pressure tightness, electrical function, and response speed before leaving our factory doors.
Sourcing specialized alloys and high-performance elastomers requires a dependable supply network. Our facilities maintain deep integrations with domestic raw material suppliers, buffering against global raw material disruptions and ensuring reliable, on-time delivery schedules.
Figure 1: Chengdu Factory & Office Headquarters
Founded in 2003, Xinhaosi is one of the most influential and trusted brands in the global gas safety industry. Over the past two decades, we have steadily built a robust and comprehensive production and service system, which integrates cutting-edge R&D, intelligent manufacturing with advanced automation equipment, digital marketing across global channels, professional after-sales support with an experienced technician team, flexible OEM/ODM services, as well as CNAS-Accredited laboratory calibration services that meet international standards.
Our diversified product portfolio covers industrial & residential gas detection & alarm systems, industrial & household gas solenoid valves, and urban gas pipeline network monitoring systems—all engineered to adapt to complex working environments and strict safety requirements. We produce and sell tens of millions of units annually, catering to a wide range of industries that demand reliable gas detection solutions, including oil & gas exploration and production, petrochemicals, urban gas distribution, automotive manufacturing, pharmaceuticals, new energy, steel production, and beverage processing.
Guided by the core mission of “Making Gas Safety Accessible Everywhere,” we consistently deliver high-performance, reliable products and customized solutions tailored to each client’s unique needs. Every item we manufacture undergoes rigorous quality control tests, and every service we provide is backed by our professional technical team, fully embodying our unwavering commitment to safeguarding gas safety across both industrial workplaces and residential environments, and striving to build a safer world with sustainable gas safety technologies.
Figure 2: Deyang Intelligent Production Base
Figure 3: CNAS Accredited Calibration Laboratory
Adhering to ISO9001 quality management system standards, Xinhaosi's core products have obtained a full range of authoritative certifications, including national compulsory Products Certification, explosion-proof certification, fire product certification, CPA measurement instrument type approval certificate, and international approvals as CE, SIL. Additionally, Xinhaosi holds honors such as "National Quality Integrity Benchmark Enterprise" , "National Quality Leading Enterprise in the Gas Alarm Industry," member of the China Fire Protection Association, and the main drafting organization for the national standard of solenoid valves, further confirming its industry influence and reputation.
In the field of intellectual property, Xinhaosi has built a robust innovation system with over 50 patents and software copyrights . These patents cover core technological areas, including a graphical monitoring system for gas detection and alarm, which enables predictive maintenance based on historical data to reduce equipment failure rates by over 30%, and a solenoid valve with flow monitoring functionality that integrates flow detection and alarm capabilities . The company also pioneered China's first networked bus-type gas leakage monitoring system and the only maximum-point gas leakage monitoring system certified by the Ministry of Public Security, demonstrating its leading position in cutting-edge technological research.
Our in-house laboratory is accredited by the China National Accreditation Service for Conformity Assessment (CNAS), recognized both domestically and internationally under the ILAC-MRA framework. It operates in accordance with ISO/IEC 17025, the international standard for testing and calibration laboratories. It provides reliable and traceable testing services for gas detection and alarm products, solenoid valves, and related safety equipment. Test reports issued by the CNAS-accredited laboratory are widely accepted by regulatory authorities, certification bodies, and customers in China and overseas, helping to ensure product quality, safety compliance, and market access.
Emergency shut-off configurations vary considerably depending on the specific field application. Our designs adapt to various demanding environments:
Explosive atmospheres require explosion-proof gas detectors (such as the GTYQ-AT0602) paired with normally closed emergency shut-off valves. If a leak occurs, the system cuts off gas lines within milliseconds, isolating the hazard and preventing fire spread.
Urban infrastructure depends on continuous pressure and flow monitoring. Integrating our wireless smart pressure monitors with municipal shut-off stations allows utility companies to identify and address pressure anomalies remotely.
For homes and commercial kitchens, simpler, cost-effective detection is key. Solenoid valves like the XF3 Series link with household gas detectors, automatically closing gas supply lines the moment a domestic leak is detected.
Established on April 17th, 2003. Xinhaosi launched its 1st generation of gas leak alarms and fire fighting products, establishing a foundational presence in China's early gas safety market.
Expanded operations into safety valve production. Scaled up our OEM business and established our headquarters in Chengdu's Longtan Industrial Park.
Reached a milestone of 10 million units sold. Relocated to our dedicated Chengdu factory, expanded our service footprint across China, and introduced dedicated power monitoring systems.
Launched our in-house IoT cloud platform, obtained High-Tech Enterprise status, and became an official supplier to China’s top 5 gas suppliers.
Began constructing the Deyang manufacturing base. Formed our specialized Petrochemical & International Business Division, and earned recognition as a Provincial Technology Center.
Completed and opened the Deyang production facility. Today, we continue driving safety innovation by launching urban pipeline monitors, wireless detectors, and AI-enabled smart valves.
