Integrate our precision-manufactured safety equipment directly into your pipeline networks for real-time risk mitigation.
Within the spectrum of global industrial processes, chemical manufacturing, and civil utility grids, the safety profile of gas handling structures dictates both operational continuity and local safety. As networks modernize, the requirement for standard size-critical elements—primarily the 1 Gas Shut Off Valve (commonly referring to DN25 and associated Class 1 emergency shutdown systems)—has grown exponentially.
These components do not merely function as mechanical isolators. Under modern regulatory parameters, a 1-inch solenoid or motorized safety valve functions as the primary execution node in a broader Safety Instrumented System (SIS). The integration of fast-acting electromagnetic actuators, bubble-tight sealing mechanics, and low power ratings ensures compatibility with volatile gas types including natural gas, methane, propane, butane, and hydrogen-mixed fuels.
As the international gas grid shifts toward higher automation, manufacturers and suppliers must deliver valves with certified functional reliability (such as SIL levels) to comply with ATEX, IECEx, and CE requirements, reducing explosive and emissions risks globally.
Founded in 2003, Xinhaosi stands as an influential brand within the global gas safety and control landscape. Over more than two decades, we have established a highly robust production and service ecosystem. This integrates advanced R&D divisions, highly automated smart manufacturing lines, worldwide digital logistics, professional support teams, and fully accredited calibration laboratories.
Our product portfolio reaches into high-demand applications, providing residential & industrial gas detection systems, specialized gas solenoid shut-off valves, and comprehensive urban pipeline monitoring architectures. Engineered for demanding, harsh operational parameters, we produce and deliver tens of millions of components yearly.
Our technologies serve critical industries worldwide, including petrochemical manufacturing, public utility distribution networks, industrial heat treatment plants, pharmaceutical labs, automotive paint lines, steel works, and food and beverage manufacturing. Guided by our core mission, "Making Gas Safety Accessible Everywhere," we support each deployment with comprehensive testing and expert localized service.
Explore the certified technical parameters and rigorous standardization that support every single gas safety valve and control unit we manufacture.
Xinhaosi operates in strict alignment with the ISO9001 Quality Management System. Our product lines hold national and international regulatory certifications, including national compulsory Products Certification (CCC), explosion-proof certifications, fire safety product listings, CPA measurement instrument type approvals, and European CE and Safety Integrity Level (SIL) accreditations. In recognition of our industry leadership, Xinhaosi is honored as a "National Quality Integrity Benchmark Enterprise" and is a primary drafter of China's national standards for gas safety solenoid valves.
Our technological patents exceed 50 active filings and software copyrights. Key innovations include graphical monitoring software that reduces field device failure rates by up to 30% via historical data analysis, and integrated flow-monitoring safety valves. Xinhaosi also developed the first networked bus-type gas monitoring system certified by specialized safety ministries.
Our internal laboratory is accredited by the China National Accreditation Service for Conformity Assessment (CNAS), recognized internationally under the ILAC-MRA framework. Operating to ISO/IEC 17025 laboratory standards, we execute verification on all solenoid valves and detector units, ensuring full market entry compliance globally.
A 1 Gas Shut Off Valve (nominally corresponding to DN25 or a 1-inch pipe diameter, as well as Class 1 safety-critical ratings) forms the core boundary between high-pressure source supply manifolds and downstream usage networks. Selecting and manufacturing these units requires deep engineering expertise. Below, we break down the critical performance vectors required for industrial and commercial compliance.
Modern emergency isolation relies on fast-release solenoid mechanisms. When gas detection controllers (such as the JB-TB-AT2020 series) sense concentration spikes exceeding pre-configured Lower Explosive Limits (LEL), they output an electrical impulse (typically 9V to 24V DC, pulsed for <1 second) to the valve's electromagnet. The electromagnetic field acts on the internal plunger, releasing the latching spring and allowing the valve to seal instantly. In safety-focused installations, manual reset configurations are preferred. This ensures that after a gas leak triggers the valve, it cannot reopen automatically, preventing gas release until safety personnel clear and inspect the area.
The valve body material defines its chemical resistance and pressure boundaries. Cast brass, forged steel, and aluminum alloys are chosen depending on the environment. For outdoor utility meters exposed to temperature extremes (-40°C to +60°C) or corrosive chemical plants, protective coatings and corrosion-resistant alloys prevent mechanical failure. Internally, seal materials like Viton (FKM) or Nitrile butadiene rubber (NBR) are selected based on the gas medium, preventing degradation from trace chemical additives and maintaining bubble-tight shutoff (ANSI Class VI standard) over thousands of cycles.
The internal flow profile (Cv value) of a 1-inch safety valve determines the pressure drop across the device. Standard safety-valve bodies feature optimized flow pathways that minimize turbulence and prevent low pressure downstream. A high flow coefficient (Cv) ensures that industrial burners receive steady gas volume and pressure, avoiding flameout issues that could trip boiler safety controls.
| Performance Parameter | DN25 (1 Inch) Brass Valve Specifications | DN25 (1 Inch) Explosion-Proof Cast Valve | Functional Application Impact |
|---|---|---|---|
| Nominal Diameter (DN) | 25 mm (1 Inch) | 25 mm (1 Inch) | Direct coupling to commercial/industrial lines |
| Operating Media | Natural Gas, Methane, Propane, LPG | Town Gas, Corrosive/Non-corrosive Gases | Versatile media compatibility |
| Closing Speed | < 0.3 Seconds | < 0.5 Seconds | Mitigates downstream gas leaks instantly |
| Ex-Proof Rating | Exmb II T4 Gb | Exd II C T6 Gb | Safe for Zone 1 and Zone 2 hazardous areas |
| Sealing Material | NBR Rubber / Viton Option | Viton / FKM Synthetic Elastomer | Zero-leakage integrity (ANSI Class VI) |
| Working Pressure | 0 to 50 kPa | 0 to 200 kPa / High-pressure option | Handles low-pressure and mid-pressure lines |
| Control Signal | 9-24V DC Pulse (Current < 2A) | 24V DC / 220V AC Continuous or Pulse | Compatible with diverse fire control panels |
From micro-commercial configurations to massive petrochemical grids, our valve systems deliver reliable hazard protection.
Integrated in enclosed basement parking lots, multi-tenant commercial kitchens, and central boiler plant facilities. Connected directly with localized CO/CH4 detectors to automatically close gas feeds during early leak detection.
Designed for chemical processing reactors, semiconductor furnace gas boxes, pharmaceutical synthesis zones, and automotive paint lines where fuel supply isolation must be coupled with emergency stop systems.
Deployed at city gate stations, district gas pressure regulating boxes, and multi-story high-rise buildings. Operates as an independent safeguard against pressure anomalies and earthquake-induced pipe breaks.
A retrospective look at our strategic milestones, highlighting our technical development from 2003 through the present and into the future.
Looking ahead, Xinhaosi focuses on integrating digital technologies directly into the mechanical structures of our valves. Our next-generation pipeline safety development focuses on three primary technological areas:
Detailed technical advice on selecting, installing, and maintaining gas shut-off valve equipment.
Complete your safety system loop with our certified industrial gas detectors, flame sensors, and solenoid control configurations.
