Explore our high-performance line of safety shut-off systems and intelligent gas controllers.
A comprehensive analysis of design architectures, safety parameters, and materials for commercial-grade fluid control.
A 1 Inch Solenoid Valve Normally Closed (NC) system functions as the primary mechanical safety sentinel in complex distribution frameworks. In its default state, the valve prevents fluid or gas movement, requiring continuous or pulse electrical excitation to pull the internal piston back and permit flow. Under power failure, emergency triggering, or structural faults, the magnetic flux drops to zero, and the high-tension return spring instantaneously seals the orifice, preventing volatile gas accumulation or system flooding.
Choosing the correct DN25 (1-inch) valve architecture requires a balance of fluid dynamics, pressure ratings, and coil duty cycles. For medium-pressure municipal installations (typically up to 0.5 Bar for household gas grids and 4 Bar to 6 Bar for light industrial applications), direct-pilot structures or kick-pilot configurations are chosen over simple direct-acting designs. These designs use line pressure to assist in sealing the valve seat, allowing smaller, low-power electromagnets to control large flows.
Future Ready Gas Safety Solutions
Founded in 2003, Xinhaosi is one of the most influential and reliable brands in the gas safety industry. We provide customer-focused products and services to safeguard the safe operation of every factory, the comfort of every city, and the peace and happiness of every home. Powered by cutting‑edge production systems and technology, we deliver more advanced, intuitive, and precise gas safety solutions for shaping a safer future world.
We utilize advanced electronic detection technology to make unknown gas leak risks clear and visible, eliminating safety gaps through integrated automated valve shutoff arrays and distributed sensor networks.
Integrated gas safety frameworks designed for industrial processing, urban distribution, and domestic environments.
Detection Systems. Safety First from Precision Sensing.
Gas Detectors. Home Safety from Gas Monitoring.
Gas Solenoid Valves. Protecting from the Source.
Distribution & Monitoring. Smart Sensing for Urban Gas.
How vertical integration, modern metallurgy, and automated calibration reduce costs while improving system quality.
By using locally sourced, high-grade brass, corrosion-resistant aluminum alloys, and structural steel, Chinese manufacturers can supply materials that withstand mechanical stress, preventing stress-corrosion cracking (SCC).
Our valve seats and guide tubes are machined on multi-axis Japanese CNC lines to tolerances within 0.005mm. This degree of dimensional control ensures consistent closing speeds and reduces friction, extending seal lifespan.
Every single 1-inch solenoid valve undergoes a multi-point inspection loop: Helium mass spectrometer leak testing (exceeding Class VI shutoff levels), pressure decay testing, and 24-hour coil heat testing under continuous current.
From custom lead wires and explosion-proof terminal boxes to unique flow coefficients (Cv values) and specialized elastomeric seals (FKM, NBR, EPDM), our R&D cycle produces custom engineering samples in weeks instead of months.
Located near major shipping hubs like Shanghai, Shenzhen, and Ningbo, our factories operate integrated logistics networks that guarantee transit times, complete export clearance, and safe transport to global ports.
By working directly with the manufacturer instead of brokers, procurement teams gain real-time visibility into production schedules, direct contact with engineering staff, and clear accountability for quality control.
Our commitment to precision engineering, continuous safety innovation, and international standards.
Providing emergency shutdown and precise flow control across commercial, municipal, and industrial installations.
In hotels and high-capacity restaurants, a 1-inch normally closed solenoid valve is installed inline with the main gas supply line. Linked directly to methane, CO, and thermal sensors, the valve automatically cuts off gas flow in the event of a leak. This system meets building code requirements for automatic isolation and reduces the risk of fires in busy kitchens.
On heat treatment furnaces, kilns, and industrial steam boilers, our 1-inch valves control the startup preheat cycles. Designed for high cycle rates and high temperatures, these valves provide tight shutoff and precise gas dosing, reducing fuel waste and keeping process control parameters consistent.
At pressure reduction substations and gas gate systems, DN25 solenoid valves act as final safety elements. If system pressure rises or low-voltage conditions occur, our low-power solenoid coils close the valve, isolating residential distribution lines from high upstream line pressures.
Empowered by technology, full-chain integration, comprehensive protection, shaping the future with intelligence.
Our engineering services go beyond valve manufacturing. We design and deliver complete, integrated safety loops that combine wireless gas detection transmitters, multi-channel control panels, emergency alarm units, and fast-acting solenoid valves. This end-to-end integration simplifies system commissioning, minimizes interface issues, and ensures all safety elements work together reliably.
More About Solutions
How we align manufacturing processes with international regulatory requirements to simplify local importing and installation approvals.
Industrial facilities where flammable gases, vapors, or mists are processed require explosion-proof electrical equipment. Our solenoid valves are designed to meet ATEX and IECEx standards, with housing classifications including Ex d IIC T6 Gb and Class I, Div 1 ratings. The cast aluminum or heavy stainless steel housing is built to contain an internal explosion without igniting the surrounding atmosphere.
In chemical and energy industries, safety systems are rated by Safety Integrity Levels (SIL). Our 1-inch normally closed solenoid valves are designed to meet SIL 3 standards, with low probability of failure on demand (PFD). Our robust spring-return mechanism operates reliably even after extended periods of inactivity.
The seal material must match the chemistry and temperature of the media to prevent leakage. We offer a range of sealing compounds:
Collaborating with global enterprises to secure infrastructure and protect lives.
Analyzing the shift toward IoT connectivity, energy-efficient coils, and hydrogen-ready gas materials.
Modern gas safety systems integrate sensors directly into the solenoid valve body. By tracking coil current, temperature, and open/close transit times, system operators can predict component failures before a shutdown occurs.
Traditional normally open/closed solenoid valves require continuous energy to hold their open state, producing heat. Our next-generation valves use dual-coil and pulse-drive designs, reducing energy use during operation by up to 85%.
As cities blend hydrogen into natural gas distribution networks, materials must adapt. Our latest R&D focuses on elastomers and metals that resist hydrogen embrittlement, ensuring safety in clean energy grids.
Stay informed about product launches, trade events, and industry developments at Xinhaosi.
Xinhaosi Electronic Detection Technology Co., Ltd. officially launched its new Handheld Uncooled Infrared Gas Leak Detector, featuring dual-technology fusion, ultra-fast response, and long-distance non-contact detection...
XINHAOSI recently participated in the 5th Western China Cross-Border E-Commerce Expo held in Chengdu. The event brought together cross-border e-commerce platforms, global buyers, manufacturers, and supply chain companies...
XINHAOSI recently participated in the 2026 Sichuan (Chengdu) – Indonesia Industry Matchmaking Conference held in Chengdu. The event gathered enterprises and industry representatives from China and Indonesia...
Addressing key design, installation, and operation questions from engineers and procurement teams.
Direct-acting valves use electromagnetic force alone to lift the plunger and open the seat, operating reliably from zero differential pressure up to their maximum rating. Pilot-operated valves require a minimum line pressure differential (typically 0.3 to 0.5 Bar) to operate, using the media pressure to lift the primary diaphragm.
Standard brass or aluminum gas valves are designed for clean, dry gases like methane and LPG. For wet gas, ammonia, or hydrogen sulfide, we recommend using stainless steel bodies (SS304 or SS316) paired with FKM or PTFE seals to prevent chemical attack and erosion.
We offer coils encapsulated in explosion-proof housings rated for EX d IIC T6. These are designed to contain internal electrical sparks or explosions, preventing the ignition of volatile surrounding gases.
Our spring-actuated 1-inch solenoid valves shut off in under 0.3 seconds once power is disconnected, providing rapid isolation in emergency situations.
Yes. Many of our industrial models require a manual reset. Once triggered closed by a safety interlock or power outage, the valve will not open when power returns until a technician inspects the system and manually resets the mechanism.
We supply G-thread (parallel ISO 228), NPT (tapered ANSI/ASME B1.20.1), and flanged connection configurations (such as EN1092-1 or ANSI standards) to match regional piping specifications.
Integrate our sensors and valves to protect your commercial and industrial pipelines.
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