Explore our premium range of industrial flame detectors, control interlocks, and low-voltage electrical boxes engineered for high-reliability environments.
A normally closed (NC) solenoid valve is an electromechanical safety device designed to block medium flow in its de-energized state. When power is applied to the electromagnetic coil, a magnetic field is generated that pulls the plunger against the force of the return spring, thereby opening the orifice and allowing flow. This fail-safe state is essential for critical emergency shutoff systems handling hazardous gases, combustible liquids, or high-pressure steam.
Unlike normally open configurations, the NC solenoid serves as a physical barrier during power loss or emergency stops. This design choice is fundamental in designing modern safety system loops, such as Safety Integrity Level (SIL) certified systems in oil and gas processing plants.
Our standard engineering specifications outline the robust design parameters required by modern industrial facilities:
| Parameter | Specification Range |
|---|---|
| Valving Orifice | DN15 to DN300 (Flanged/Threaded) |
| Body Materials | Forged Brass, SUS304, SUS316, Cast Iron |
| Pressure Range | 0 to 16 Bar (Zero-differential startup option) |
| Electrical Coils | Ex d II C T6 Gb Explosion-proof, IP65/IP67 |
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.
Why international EPC contractors and gas distribution firms partner with us for critical shutoff technology.
By producing our own solenoid coils, machining the valve bodies, and carrying out the precise vulcanization of seals in-house, we eliminate traditional sub-tier delay cycles and maintain rigid quality benchmarks from raw ingot to testing block.
Equipped with state-of-the-art multi-axis CNC machines and automated electromagnetic testing labs, our R&D center handles custom voltage demands (e.g. 12VDC, 24VDC, 110VAC, 220VAC), hazardous area explosion-proof housings, and customized pilot channels in days.
Every single normally closed solenoid valve unit undergoes automatic helium mass spectrometer leak detection, high-pressure strength checking, and minimum coil excitation voltage tests to ensure zero-defect shipment before leaving our facility.
Future Ready.
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 potential disasters before they can arise.
Explore Our Legacy
Year of Establishment
Exporting Nations
Operational Cycles Life Rating
Pre-Shipment Leak Tolerance
Adhering to local installation codes and operating standards across regional economic zones.
Operating across different geographic regulatory regions demands localized safety certifications. At Xinhaosi, our production line conforms strictly to standards such as ATEX for European explosive atmospheres, EAC for Eurasian Customs Union integrations, and CCC/Ex for Asian industrial zones. For global EPC projects, we offer engineering documentation with full material traceability (EN 10204 3.1 certification) and third-party verified test certificates.
The modern process control industry is moving rapidly toward digitalization. Modern solenoid valves are no longer isolated mechanical assets. Next-generation systems integrate directly with smart data gateways via RS-485 Modbus or wireless communication protocols.
Our research division is focusing on two primary industry trends:
Empowered by technology, we offer full-chain integration and comprehensive hazard mitigation. By combining precise sensing units, interlocked data systems, and heavy-duty normally closed shutoff valves, we shape a safer future using intelligence.
Discover Integrated SystemsWhen our household or industrial combustible detectors identify localized concentration spikes, the intelligent central interlock controller fires an immediate electrical impulse to the normally closed solenoid valve. The valve seals the mainline feed in less than 0.3 seconds, mitigating risks before ignition levels are achieved.
Expert engineering insights regarding installation, configuration, and performance optimization.
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 to enhance safety and efficiency in petrochemical, refrigeration, natural gas and industrial safety scenarios.
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, creating new opportunities for international business cooperation and overseas market development.
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 to strengthen industrial cooperation and explore new business opportunities in Southeast Asia.
Explore our industrial pressure transmitters, explosion-proof monitoring units, and high-performance wireless household shut-off valves.
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