Explore our primary array of high-caliber solenoid valves, gas detection systems, and integrated control safety devices designed to support massive-scale operations.
A technical whitepaper overview covering working mechanisms, materials, and crucial specifications for industrial procurements.
A 1 inch solenoid valve normally closed (NC) is a core control instrument widely adopted across piping networks to regulate fluids and gases. By design, the valve remains in a closed position when de-energized, stopping fluid flow instantly to prevent leakage, pressure surges, or potential environmental hazards. When an electrical current is applied to the solenoid coil, a magnetic field is generated, attracting the plunger and opening the seal to permit medium flow.
For industrial automation, normally closed valves act as crucial safety mechanisms. For example, if a sudden power disruption occurs, these valves default to their closed state, isolating hazardous gases or volatile chemical media safely. The 1-inch pipe diameter is globally standard, offering an ideal compromise between optimal flow rate (Cv value) and localized pressure management, making it standard for industrial gas pipelines, heating systems, and manufacturing processing lines.
Years R&D Experience
Patents & Copyrights
| Orifice Size | DN25 (1 Inch) |
| Operation Type | Direct-Acting / Pilot-Operated |
| Body Material Options | Brass, Stainless Steel (304/316), Cast Iron |
| Sealing Elements | NBR (Standard), Viton/FKM (High-Temp), EPDM |
| Voltage Profiles | AC220V, AC110V, DC24V, DC12V |
| Explosion-Proof Ratings | Ex d IIC T6 Gb / SIL Certified |
Unlocking unparalleled manufacturing efficiency, reliable raw materials, and robust quality control metrics from Sichuan's industrial hubs.
From raw brass casting and stainless steel forging to electrical coil copper winding, our Chengdu and Deyang factories have direct local access to key mineral and metallurgical resources. This localized cluster keeps lead times low and guarantees absolute consistency in alloy composition.
We deploy precision high-axis CNC centers to machine valve bodies with micron-level tolerances. Achieving smooth interior geometries minimizes fluid drag, ensures high flow coefficients (Cv), and guarantees zero pressure drop variation across continuous operational periods.
Our factories are managed under strict ISO9001 standards. The products satisfy multiple prestigious regulatory certificates, including Chinese Fire Safety codes, Ex explosion-proof standards, CE directives, and SIL safety integrity level certifications.
The shift toward smart networks, energy efficiency, and safety systems Integration.
The modern industry is moving beyond standard mechanical operation. Advanced valves now feature integrated diagnostics. By embedding sensors that track temperature changes, coil resistance variations, and media pressure drop ratios, AI-powered systems can predict diaphragm fatigue and physical wear. In cooperation with cloud platforms, safety systems calculate structural decay models, reducing unplanned industrial downtime by up to 30%.
Additionally, modern systems emphasize low-wattage, energy-saving coils. By utilizing pulse width modulation (PWM) power supplies, power consumption is reduced by up to 70% once the valve is activated. This limits thermal stress on the solenoid coil, extending its lifetime and improving safety in areas processing combustible gases.
Industrial facilities increasingly link combustible gas alarm controllers directly to emergency shut-off valves. If a detector senses a gas leak, the control panel drops the electrical current to the normally closed 1-inch valve, triggering a shutoff within 0.3 seconds. This rapid, automated isolation of flammable, pressurized media prevents hazardous gas buildup, protecting both personnel and valuable capital equipment.
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.
Chengdu Factory & Office
Deyang Factory
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.
Over two decades of dedicated engineering excellence and steady development, charting the path of innovation.
Providing customizable valve integrations tailored to municipal networks, residential compounds, and industrial chemical facilities.
Used at primary municipal city gates and district pressure regulating cabinets, these 1-inch valves act as localized protection line elements. Connected directly to controllers, they automatically close to prevent overpressure in residential downstream pipes.
Hotels, schools, and large residential complexes rely on automated gas-fired boilers. A 1-inch normally closed valve integrated into the fuel supply manifold ensures fuel lines seal closed if gas levels exceed safe limits.
Engineered from durable materials like stainless steel with explosion-proof enclosures, these valves handle harsh environments. They resist aggressive corrosive chemicals, offering safe operations on refining offshore platforms.
Technical answers to key selection criteria for 1-inch normally closed solenoid valves.
A professional selection of industrial and residential sensing systems to establish a fully integrated safety loop.
