Discover our signature line of gas detection systems, interlock control modules, and smart solenoid shutoff valves deployed globally.
A 2 Inch Solenoid Valve Normally Closed (DN50) represents a critical safety component in modern fluid and gas control systems. In its default state, the valve remains tightly shut via spring-loaded mechanism, blocking the flow of natural gas, LPG, water, or oil. Only when electrical power is applied to the solenoid coil does the magnetic field pull the plunger upward, allowing the passage of media.
For industrial applications, the 2-inch pipe size is a vital threshold. It enables large-scale flow routing without introducing excessive pressure drops, making it the perfect standard for main supply lines, industrial boiler feeds, and factory emergency shutoff configurations.
Our engineering architecture relies heavily on high-precision cast aluminum alloy and forged brass bodies. This guarantees not only mechanical robustness but also an optimized weight profile that minimizes mechanical strain on pipelines.
| Technical Parameter | Standard Specification (DN50) |
|---|---|
| Working Pressure | 0 - 0.5 MPa (Gas) / Up to 1.6 MPa (Liquid) |
| Body Material | CNAS Accredited Aluminum Alloy / Forged Brass |
| Sealing Material | NBR / Viton (FKM) for High Heat Performance |
| Electrical Control | DC24V, AC220V, AC110V (50/60Hz) |
| Explosion-Proof Class | Ex d IIC T6 Gb / ATEX Rated Coils Available |
| Response Time | < 1 Second (Immediate Emergency Shutdown) |
Exploring the commercial demands, industrial regulations, and market growth drivers across global territories.
With tightening environmental mandates and safety regulations (such as OSHA in the US and ATEX directives in the EU), industrial facilities must possess reliable emergency shutdown systems. 2-inch normally closed valves act as the primary firewall, cutting off fuel supplies instantly during power outages or alarm triggers.
Normally Closed (NC) configurations are favored in critical environments. If a chemical plant loses electric power, the valve must naturally close by mechanical spring tension. This prevents uncontrolled hazardous chemical leaks and stops fire propagation lines.
For gases such as methane, hydrogen, and propane, even micro-leakages present immense explosion hazards. Our DN50 solenoid valves utilize specialized elastomer compounds that ensure zero gas escape under persistent pressure differentials.
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.
Deploying world-class automation and specialized supply chain integration to deliver unmatched value.
Our Deyang and Chengdu manufacturing centers utilize advanced robotic assembly systems. Automated CNC machining centers ensure the body tolerances of our 2 Inch Solenoid Valves are accurate to within microns. This minimizes friction on the internal plunger guides, dramatically extending the mechanical lifespan of our normally closed structures.
Operating in China's industrial manufacturing heartlands allows Xinhaosi to secure premium raw materials (high-grade aluminum, chemical-resistant NBR gaskets, and pure copper wires for electromagnetic coils) at competitive rates. This cost efficiency is passed directly to global buyers, allowing us to supply industrial-grade safety valves without the high markups common in Western markets.
Unlike standard assembly shops, every single 2-inch gas valve produced by Xinhaosi is subjected to rigorous pressure-hold and leak tests prior to leaving the facility. Helium-based mass spectrometers trace microscopic defects down to 10⁻⁵ mbar·l/s, ensuring that when our clients install these systems on-site, they operate reliably and without leakages from day one.
With an experienced in-house R&D engineering division, we adapt standard DN50 configurations to meet custom connection standards (flange vs. thread), alternative voltage configurations (e.g., specific DC requirements for solar-powered outposts), or specialized corrosion-resistant coatings for offshore deployment.
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.
CNAS Accredited Laboratory operates under ISO/IEC 17025 standards.
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.
How our DN50 safety shutoff valves operate across critical infrastructure and commercial setups globally.
Installed directly on natural gas and LPG distribution headers inside industrial parks. These DN50 valves link with remote gas sensors to shut down gas flow the moment a leak is detected on the pipeline.
Integrated with steam generators and large-scale space heaters. If power is interrupted or temperature bounds are exceeded, the normally closed solenoid valve closes immediately to stop fuel gas supply.
Perfect for commercial kitchens, hotels, and multifamily complexes. Connected to our JB-MK-AT2042X Interlock Box, the 2-inch valve triggers instantly if a kitchen sensor detects high concentrations of gas.
From a regional starter to an international manufacturer of high-performance gas safety systems.
The industrial gas safety market is rapidly transitioning toward smart, integrated valve systems. Instead of simple mechanical open/close actions, modern 2 Inch Solenoid Valves are increasingly outfitted with smart diagnostics. These systems monitor coil resistance, operational temperatures, and cycling frequency in real-time.
With predictive maintenance protocols, these smart valves can alert site operators *before* a failure occurs, reducing downtime. Additionally, energy-efficient coils that use low-power holding currents are becoming standard, minimizing thermal stress and power consumption.
For international buyers and plant engineers, purchasing a solenoid valve involves balancing several safety and performance criteria. Key considerations include:
In-depth answers to common questions about selecting and installing 2-inch normally closed solenoid valves.
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